Docs: Simplify SECURITY.md.

This does the previous commit with CMake.

AC_EGREP_CPP uses AC_REQUIRE so the outermost if-commands must
be changed to AS_IF to ensure that things wont break some day.
See 5a5bd7f871.

.github/SECURITY.md

@@ -4,7 +4,7 @@
 
 We provide security updates to the development branch and the stable
 branches. Security patches for old releases are available on the
-[project website](https://tukaani.org/xz).
+[project website](https://xz.tukaani.org/xz-utils/).
 
 ## Reporting a Vulnerability
 
@@ -16,13 +16,7 @@ the chance that the exploit will be used before a patch is released.
 You may submit a report by emailing us at
 [xz@tukaani.org](mailto:xz@tukaani.org), or through
 [Security Advisories](https://github.com/tukaani-project/xz/security/advisories/new).
-While both options are available, we prefer email. In any case, please
-provide a clear description of the vulnerability including:
-
-- Affected versions of XZ Utils
-- Estimated severity (low, moderate, high, critical)
-- Steps to recreate the vulnerability
-- All relevant files (core dumps, build logs, input files, etc.)
+While both options are available, we prefer email.
 
 This project is maintained by a team of volunteers on a reasonable-effort
 basis. As such, please give us 90 days to work on a fix before

.github/workflows/ci.yml

@@ -1,10 +1,9 @@
+# SPDX-License-Identifier: 0BSD
+
 #############################################################################
 #
 # Author: Jia Tan
 #
-# This file has been put into the public domain.
-# You can do whatever you want with this file.
-#
 #############################################################################
 
 name: CI
@@ -38,7 +37,7 @@ jobs:
         if: ${{ matrix.os == 'ubuntu-latest' && matrix.build_system == 'autotools' }}
         run: |
             sudo apt-get update
-            sudo apt-get install -y autoconf automake build-essential po4a autopoint gcc-multilib doxygen
+            sudo apt-get install -y autoconf automake build-essential po4a autopoint gcc-multilib doxygen musl-tools
 
       # Install Autotools on Mac
       - name: Install Dependencies
@@ -50,7 +49,7 @@ jobs:
         if: ${{ matrix.os == 'ubuntu-latest' && matrix.build_system == 'cmake' }}
         run: |
             sudo apt-get update
-            sudo apt-get install -y build-essential cmake
+            sudo apt-get install -y build-essential cmake musl-tools
 
       # Install CMake on Mac
       - name: Install Dependencies
@@ -80,15 +79,34 @@ jobs:
 
       # ifunc must be disabled for this test because __attribute__ ifunc is
       # incompatible with -fsanitize=address.
+      #
+      # The sandbox must also be disabled because it will prevent access to
+      # the /proc/ filesystem on Linux, which is used by the sanitizer's
+      # instrumentation.
       - name: Build with -fsanitize=address,undefined
         if: ${{ matrix.os == 'ubuntu-latest' && matrix.build_system == 'autotools' }}
-        run: ./build-aux/ci_build.sh -b autotools -p build -f "-fsanitize=address,undefined" -d ifunc
+        run: ./build-aux/ci_build.sh -b autotools -p build -f "-fsanitize=address,undefined" -d ifunc,sandbox
       - name: Test with -fsanitize=address,undefined
         if: ${{ matrix.os == 'ubuntu-latest' && matrix.build_system == 'autotools' }}
         run: |
-            ./build-aux/ci_build.sh -b autotools -p test -f "-fsanitize=address,undefined" -d ifunc
+            ./build-aux/ci_build.sh -b autotools -p test -f "-fsanitize=address,undefined" -d ifunc,sandbox
             cd ../xz_build && make distclean
 
+      # musl libc has some slight differences compared to glibc, including
+      # the lack of ifunc support. This tests if the ifunc detection
+      # functions properly since musl-gcc can compile with ifunc support,
+      # but will fail at runtime.
+      - name: Build with musl libc
+        if: ${{ matrix.os == 'ubuntu-latest'}}
+        run: ./build-aux/ci_build.sh -b ${{ matrix.build_system }} -p build -m "/usr/bin/musl-gcc"
+      - name: Test with musl libc
+        if: ${{ matrix.os == 'ubuntu-latest'}}
+        run: |
+            ./build-aux/ci_build.sh -b ${{ matrix.build_system }} -p test -m "/usr/bin/musl-gcc"
+      - name: Clean up musl libc run
+        if: ${{ matrix.os == 'ubuntu-latest' && matrix.build_system == 'autotools' }}
+        run: cd ../xz_build && make distclean
+
       - name: Build with full features
         run: ./build-aux/ci_build.sh -b ${{ matrix.build_system }} -p build
       - name: Test with full features
@@ -135,7 +153,7 @@ jobs:
         run: ./build-aux/ci_build.sh -b ${{ matrix.build_system }} -d small -p test -n small
 
       # Attempt to upload the test logs as artifacts if any step has failed
-      - uses: actions/upload-artifact@a8a3f3ad30e3422c9c7b888a15615d19a852ae32 #v3.1.3
+      - uses: actions/upload-artifact@c7d193f32edcb7bfad88892161225aeda64e9392 #v4.0.0
         if: ${{ failure() }}
         with:
           name: ${{ matrix.os }} ${{ matrix.build_system }} Test Logs

.github/workflows/windows-ci.yml

@@ -1,10 +1,9 @@
+# SPDX-License-Identifier: 0BSD
+
 #############################################################################
 #
 # Author: Jia Tan
 #
-# This file has been put into the public domain.
-# You can do whatever you want with this file.
-#
 #############################################################################
 
 name: Windows-CI
@@ -118,7 +117,7 @@ jobs:
       ###############
 
       # Upload the test logs as artifacts if any step has failed.
-      - uses: actions/upload-artifact@a8a3f3ad30e3422c9c7b888a15615d19a852ae32 #v3.1.3
+      - uses: actions/upload-artifact@c7d193f32edcb7bfad88892161225aeda64e9392 #v4.0.0
         if: ${{ failure() }}
         with:
           name: ${{ matrix.msys2_env }} ${{ matrix.build_system }} Test Logs

.gitignore

@@ -67,6 +67,7 @@ coverage
 /tests/test_index
 /tests/test_index_hash
 /tests/test_lzip_decoder
+/tests/test_microlzma
 /tests/test_memlimit
 /tests/test_stream_flags
 /tests/test_vli

AUTHORS

@@ -9,15 +9,13 @@ Authors of XZ Utils
     specifically the LZMA SDK <https://7-zip.org/sdk.html>. Without
     this code, XZ Utils wouldn't exist.
 
-    The SHA-256 implementation in liblzma is based on the code found from
-    7-Zip <https://7-zip.org/>, which has a modified version of the SHA-256
-    code found from Crypto++ <https://www.cryptopp.com/>. The SHA-256 code
-    in Crypto++ was written by Kevin Springle and Wei Dai.
+    The SHA-256 implementation in liblzma is based on code written by
+    Wei Dai in Crypto++ Library <https://www.cryptopp.com/>.
 
-    Some scripts have been adapted from gzip. The original versions
-    were written by Jean-loup Gailly, Charles Levert, and Paul Eggert.
-    Andrew Dudman helped adapting the scripts and their man pages for
-    XZ Utils.
+    A few scripts have been adapted from GNU gzip. The original
+    versions were written by Jean-loup Gailly, Charles Levert, and
+    Paul Eggert. Andrew Dudman helped adapting the scripts and their
+    man pages for XZ Utils.
 
     The initial version of the threaded .xz decompressor was written
     by Sebastian Andrzej Siewior.
@@ -25,15 +23,31 @@ Authors of XZ Utils
     The initial version of the .lz (lzip) decoder was written
     by Michał Górny.
 
-    CLMUL-accelerated CRC code was contributed by Ilya Kurdyukov.
+    Architecture-specific CRC optimizations were contributed by
+    Ilya Kurdyukov, Hans Jansen, and Chenxi Mao.
 
     Other authors:
       - Jonathan Nieder
       - Joachim Henke
 
-    The GNU Autotools-based build system contains files from many authors,
-    which I'm not trying to list here.
+    Many people have contributed improvements or reported bugs.
+    Most of these people are mentioned in the file THANKS.
 
-    Several people have contributed fixes or reported bugs. Most of them
-    are mentioned in the file THANKS.
+    The translations of the command line tools and man pages have been
+    contributed by many people via the Translation Project:
+
+      - https://translationproject.org/domain/xz.html
+      - https://translationproject.org/domain/xz-man.html
+
+    The authors of the translated man pages are in the header comments
+    of the man page files. In the source package, the authors of the
+    translations are in po/*.po and po4a/*.po files.
+
+    Third-party code whose authors aren't listed here:
+
+      - GNU getopt_long() in the 'lib' directory is included for
+        platforms that don't have a usable getopt_long().
+
+      - The build system files from GNU Autoconf, GNU Automake,
+        GNU Libtool, GNU Gettext, Autoconf Archive, and related files.
 

COPYING

@@ -6,71 +6,95 @@ XZ Utils Licensing
     is a rough summary of which licenses apply to which parts of this
     package (but check the individual files to be sure!):
 
-      - liblzma is in the public domain.
+      - liblzma is under the BSD Zero Clause License (0BSD).
 
-      - xz, xzdec, and lzmadec command line tools are in the public
-        domain unless GNU getopt_long had to be compiled and linked
-        in from the lib directory. The getopt_long code is under
-        GNU LGPLv2.1+.
+      - The command line tools xz, xzdec, lzmadec, and lzmainfo are
+        under 0BSD except that, on systems that don't have a usable
+        getopt_long, GNU getopt_long is compiled and linked in from the
+        'lib' directory. The getopt_long code is under GNU LGPLv2.1+.
 
       - The scripts to grep, diff, and view compressed files have been
-        adapted from gzip. These scripts and their documentation are
-        under GNU GPLv2+.
+        adapted from GNU gzip. These scripts (xzgrep, xzdiff, xzless,
+        and xzmore) are under GNU GPLv2+. The man pages of the scripts
+        are under 0BSD; they aren't based on the man pages of GNU gzip.
 
-      - All the documentation in the doc directory and most of the
-        XZ Utils specific documentation files in other directories
-        are in the public domain.
+      - Most of the XZ Utils specific documentation that is in
+        plain text files (like README, INSTALL, PACKAGERS, NEWS,
+        and ChangeLog) are under 0BSD unless stated otherwise in
+        the file itself. The files xz-file-format.txt and
+        lzma-file-format.xt are in the public domain but may
+        be distributed under the terms of 0BSD too.
+
+      - Doxygen-generated HTML version of the liblzma API documentation:
+        While Doxygen is under the GNU GPLv2, the license information
+        in Doxygen includes the following exception:
+
+            Documents produced by doxygen are derivative works
+            derived from the input used in their production;
+            they are not affected by this license.
 
         Note: The JavaScript files (under the MIT license) have
-        been removed from the Doxygen-generated HTML version of the
-        liblzma API documentation. Doxygen itself is under the GNU GPL
-        but the remaining files generated by Doxygen are not affected
-        by the licenses used in Doxygen because Doxygen licensing has
-        the following exception:
+        been removed from the Doxygen output.
 
-            "Documents produced by doxygen are derivative works
-            derived from the input used in their production;
-            they are not affected by this license."
+      - The XZ logo (xz-logo.png) included in the Doxygen-generated
+        documentation is under the Creative Commons BY-SA 4.0 license.
 
-      - Translated messages are in the public domain.
+      - Translated messages and man pages are under 0BSD except that
+        some old translations are in the public domain.
 
-      - The build system contains public domain files, and files that
-        are under GNU GPLv2+ or GNU GPLv3+. None of these files end up
-        in the binaries being built.
+      - Test files and test code in the 'tests' directory, and
+        debugging utilities in the 'debug' directory are under
+        the BSD Zero Clause License (0BSD).
 
-      - Test files and test code in the tests directory, and debugging
-        utilities in the debug directory are in the public domain.
+      - The GNU Autotools based build system contains files that are
+        under GNU GPLv2+, GNU GPLv3+, and a few permissive licenses.
+        These files don't affect the licensing of the binaries being
+        built.
 
-      - The extra directory may contain public domain files, and files
-        that are under various free software licenses.
+      - The extra directory contain files that are under various
+        free software licenses.
 
-    You can do whatever you want with the files that have been put into
-    the public domain. If you find public domain legally problematic,
-    take the previous sentence as a license grant. If you still find
-    the lack of copyright legally problematic, you have too many
-    lawyers.
+    For the files under the BSD Zero Clause License (0BSD), if
+    a copyright notice is needed, the following is sufficient:
 
-    As usual, this software is provided "as is", without any warranty.
+        Copyright (C) The XZ Utils authors and contributors
 
-    If you copy significant amounts of public domain code from XZ Utils
+    If you copy significant amounts of 0BSD-licensed code from XZ Utils
     into your project, acknowledging this somewhere in your software is
     polite (especially if it is proprietary, non-free software), but
-    naturally it is not legally required. Here is an example of a good
-    notice to put into "about box" or into documentation:
+    it is not legally required by the license terms. Here is an example
+    of a good notice to put into "about box" or into documentation:
 
-        This software includes code from XZ Utils <https://tukaani.org/xz/>.
+        This software includes code from XZ Utils
+        <https://xz.tukaani.org/xz-utils/>.
 
     The following license texts are included in the following files:
+      - COPYING.0BSD: BSD Zero Clause License
       - COPYING.LGPLv2.1: GNU Lesser General Public License version 2.1
       - COPYING.GPLv2: GNU General Public License version 2
       - COPYING.GPLv3: GNU General Public License version 3
+      - COPYING.CC-BY-SA-4.0: Creative Commons Attribution-ShareAlike 4.0
+                              International Public License
 
-    Note that the toolchain (compiler, linker etc.) may add some code
-    pieces that are copyrighted. Thus, it is possible that e.g. liblzma
-    binary wouldn't actually be in the public domain in its entirety
-    even though it contains no copyrighted code from the XZ Utils source
-    package.
+    A note about old XZ Utils releases:
 
-    If you have questions, don't hesitate to ask the author(s) for more
-    information.
+        XZ Utils releases 5.4.6 and older and 5.5.1alpha have a
+        significant amount of code put into the public domain and
+        that obviously remains so. The switch from public domain to
+        0BSD for newer releases was made in Febrary 2024 because
+        public domain has (real or perceived) legal ambiguities in
+        some jurisdictions.
+
+        There is very little *practical* difference between public
+        domain and 0BSD. The main difference likely is that one
+        shouldn't claim that 0BSD-licensed code is in the public
+        domain; 0BSD-licensed code is copyrighted but available under
+        an extremely permissive license. Neither 0BSD nor public domain
+        require retaining or reproducing author, copyright holder, or
+        license notices when distributing the software. (Compare to,
+        for example, BSD 2-Clause "Simplified" License which does have
+        such requirements.)
+
+    If you have questions, don't hesitate to ask for more information.
+    The contact information is in the README file.
 

COPYING.0BSD

@@ -0,0 +1,11 @@
+Permission to use, copy, modify, and/or distribute this
+software for any purpose with or without fee is hereby granted.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
+WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
+WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL
+THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR
+CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
+NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

COPYING.CC-BY-SA-4.0

@@ -0,0 +1,427 @@
+Attribution-ShareAlike 4.0 International
+
+=======================================================================
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+Section 5 -- Disclaimer of Warranties and Limitation of Liability.
+
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+     EXTENT POSSIBLE, THE LICENSOR OFFERS THE LICENSED MATERIAL AS-IS
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+
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+
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+     possible, most closely approximates an absolute disclaimer and
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+
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+Section 6 -- Term and Termination.
+
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+     Similar Rights licensed here. However, if You fail to comply with
+     this Public License, then Your rights under this Public License
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+
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+
+       2. upon express reinstatement by the Licensor.
+
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+     right the Licensor may have to seek remedies for Your violations
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+     Licensed Material under separate terms or conditions or stop
+     distributing the Licensed Material at any time; however, doing so
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+
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+     License.
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+
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+     terms or conditions communicated by You unless expressly agreed.
+
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+
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+     conditions on any use of the Licensed Material that could lawfully
+     be made without permission under this Public License.
+
+  b. To the extent possible, if any provision of this Public License is
+     deemed unenforceable, it shall be automatically reformed to the
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+     cannot be reformed, it shall be severed from this Public License
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+
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+     failure to comply consented to unless expressly agreed to by the
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+     as a limitation upon, or waiver of, any privileges and immunities
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+Creative Commons may be contacted at creativecommons.org.

ChangeLog

@@ -1,6 +1,6 @@
 See the commit log in the git repository:
 
-    git clone https://git.tukaani.org/xz.git
+    git clone https://github.com/tukaani-project/xz
 
 Note that "make dist" doesn't put this tiny file into the package.
 Instead, the git commit log is used as ChangeLog. See dist-hook in

INSTALL

@@ -143,43 +143,37 @@ XZ Utils Installation
 
 1.2.7. Windows
 
-    If it is enough to build liblzma (no command line tools):
+    The "windows" directory contains instructions for a few types
+    of builds:
 
-      - There is CMake support. It should be good enough to build
-        static liblzma or liblzma.dll with Visual Studio. The CMake
-        support may work with MinGW or MinGW-w64. Read the comment
-        in the beginning of CMakeLists.txt before running CMake!
+      - INSTALL-MinGW-w64_with_CMake.txt
+                Simple instructions how to build XZ Utils natively on
+                Windows using only CMake and a prebuilt toolchain
+                (GCC + MinGW-w64 or Clang/LLVM + MinGW-w64).
 
-      - There are Visual Studio project files under the "windows"
-        directory. See windows/INSTALL-MSVC.txt. In the future the
-        project files will be removed when CMake support is good
-        enough. Thus, please test the CMake version and help fix
-        possible issues.
+      - INSTALL-MinGW-w64_with_Autotools.txt
+                Native build under MSYS2 or cross-compilation from
+                GNU/Linux using a bash script that creates a .zip
+                and .7z archives of the binaries and documentation.
+                The related file README-Windows.txt is for the
+                resulting binary package.
 
-    To build also the command line tools:
+      - INSTALL-MSVC.txt
+                Building with MSVC / Visual Studio and CMake.
 
-      - MinGW-w64 + MSYS (32-bit and 64-bit x86): This is used
-        for building the official binary packages for Windows.
-        There is windows/build.bash to ease packaging XZ Utils with
-        MinGW(-w64) + MSYS into a redistributable .zip or .7z file.
-        See windows/INSTALL-MinGW.txt for more information.
+      - liblzma-crt-mixing.txt
+                Documentation what to take into account as a programmer
+                if liblzma.dll and the application don't use the same
+                CRT (MSVCRT or UCRT).
 
-      - MinGW + MSYS (32-bit x86): I haven't recently tested this.
+    Other choices:
 
-      - Cygwin 1.7.35 and later: NOTE that using XZ Utils >= 5.2.0
-        under Cygwin older than 1.7.35 can lead to DATA LOSS! If
-        you must use an old Cygwin version, stick to XZ Utils 5.0.x
-        which is safe under older Cygwin versions. You can check
-        the Cygwin version with the command "cygcheck -V".
+      - Cygwin: https://cygwin.com/
+        Building on Cygwin can be done like on many POSIX operating
+        systems. XZ Utils >= 5.2.0 isn't compatible with Cygwin older
+        than 1.7.35 (data loss!). 1.7.35 was released on 2015-03-04.
 
-    It may be possible to build liblzma with other toolchains too, but
-    that will probably require writing a separate makefile. Building
-    the command line tools with non-GNU toolchains will be harder than
-    building only liblzma.
-
-    Even if liblzma is built with MinGW(-w64), the resulting DLL can
-    be used by other compilers and linkers, including MSVC. See
-    windows/README-Windows.txt for details.
+      - MSYS2: https://www.msys2.org/
 
 
 1.2.8. DOS
@@ -359,20 +353,20 @@ XZ Utils Installation
                 with --docdir=DIR.
 
     --disable-assembler
-                liblzma includes some assembler optimizations. Currently
-                there is only assembler code for CRC32 and CRC64 for
-                32-bit x86.
+                This disables CRC32 and CRC64 assembly code on
+                32-bit x86. This option currently does nothing
+                on other architectures (not even on x86-64).
 
-                All the assembler code in liblzma is position-independent
-                code, which is suitable for use in shared libraries and
-                position-independent executables. So far only i386
-                instructions are used, but the code is optimized for i686
-                class CPUs. If you are compiling liblzma exclusively for
+                The 32-bit x86 assembly is position-independent code
+                which is suitable for use in shared libraries and
+                position-independent executables. It uses only i386
+                instructions but the code is optimized for i686 class
+                CPUs. If you are compiling liblzma exclusively for
                 pre-i686 systems, you may want to disable the assembler
                 code.
 
     --disable-clmul-crc
-                Disable the use carryless multiplication for CRC
+                Disable the use of carryless multiplication for CRC
                 calculation even if compiler support for it is detected.
                 The code uses runtime detection of SSSE3, SSE4.1, and
                 CLMUL instructions on x86. On 32-bit x86 this currently
@@ -383,13 +377,15 @@ XZ Utils Installation
                 required extensions (-msse4.1 -mpclmul) then runtime
                 detection isn't used and the generic code is omitted.
 
-    --disable-ifunc
-                Disable the use of __attribute__((__ifunc__())) for
-                function dispatching even if support is detected.
+    --disable-arm64-crc32
+                Disable the use of the ARM64 CRC32 instruction extension
+                even if compiler support for it is detected. The code will
+                detect support for the instruction at runtime.
 
-                The ifunc attribute is incompatible with
-                -fsanitize=address so it may need to be disabled in
-                debug builds with extra instrumentation.
+                If using compiler options that unconditionally allow the
+                required extensions (-march=armv8-a+crc or -march=armv8.1-a
+                and later) then runtime detection isn't used and the
+                generic code is omitted.
 
     --enable-unaligned-access
                 Allow liblzma to use unaligned memory access for 16-bit,
@@ -400,8 +396,43 @@ XZ Utils Installation
                 slow. This option shouldn't be used on systems that
                 rely on such emulation.
 
-                Unaligned access is enabled by default on x86, x86-64,
-                big endian PowerPC, some ARM, and some ARM64 systems.
+                Unaligned access is enabled by default on these:
+                  - 32-bit x86
+                  - 64-bit x86-64
+                  - 32-bit big endian PowerPC
+                  - 64-bit big endian PowerPC
+                  - 64-bit little endian PowerPC
+                  - some RISC-V [1]
+                  - some 32-bit ARM [2]
+                  - some 64-bit ARM64 [2] (NOTE: Autodetection bug
+                    if using GCC -mstrict-align, see below.)
+
+                [1] Unaligned access is enabled by default if
+                    configure sees that the C compiler
+                    #defines __riscv_misaligned_fast.
+
+                [2] Unaligned access is enabled by default if
+                    configure sees that the C compiler
+                    #defines __ARM_FEATURE_UNALIGNED:
+
+                      - ARMv7 + GCC or Clang: It works. The options
+                        -munaligned-access and -mno-unaligned-access
+                        affect this macro correctly.
+
+                      - ARM64 + Clang: It works. The options
+                        -munaligned-access, -mno-unaligned-access,
+                        and -mstrict-align affect this macro correctly.
+                        Clang >= 17 supports -mno-strict-align too.
+
+                      - ARM64 + GCC: It partially works. The macro
+                        is always #defined by GCC versions at least
+                        up to 13.2, even when using -mstrict-align.
+                        If building for strict-align ARM64, the
+                        configure option --disable-unaligned-access
+                        should be used if using a GCC version that has
+                        this issue because otherwise the performance
+                        may be degraded. It likely won't crash due to
+                        how unaligned access is done in the C code.
 
     --enable-unsafe-type-punning
                 This enables use of code like
@@ -487,14 +518,25 @@ XZ Utils Installation
                                 calls any liblzma functions from more than
                                 one thread, something bad may happen.
 
+    --enable-ifunc
+                Use __attribute__((__ifunc__())) in liblzma. This is
+                enabled by default on GNU/Linux and FreeBSD.
+
+                The ifunc attribute is incompatible with
+                -fsanitize=address. --disable-ifunc must be used
+                if any -fsanitize= option is specified in CFLAGS.
+
     --enable-sandbox=METHOD
-                There is limited sandboxing support in the xz tool. If
-                built with sandbox support, it's used automatically when
-                (de)compressing exactly one file to standard output and
-                the options --files or --files0 weren't used. This is a
-                common use case, for example, (de)compressing .tar.xz
-                files via GNU tar. The sandbox is also used for
-                single-file 'xz --test' or 'xz --list'.
+                There is limited sandboxing support in the xz and xzdec
+                tools. If built with sandbox support, xz uses it
+                automatically when (de)compressing exactly one file to
+                standard output when the options --files or --files0 aren't
+                used. This is a common use case, for example,
+                (de)compressing .tar.xz files via GNU tar. The sandbox is
+                also used for single-file 'xz --test' or 'xz --list'.
+                xzdec always uses the sandbox, except when more than one
+                file are decompressed. In this case it will enable the
+                sandbox for the last file that is decompressed.
 
                 Supported METHODs:
 
@@ -506,7 +548,7 @@ XZ Utils Installation
                         no      Disable sandboxing support.
 
                         capsicum
-                                Use Capsicum (FreeBSD >= 10) for
+                                Use Capsicum (FreeBSD >= 10.2) for
                                 sandboxing. If no Capsicum support
                                 is found, configure will give an error.
 
@@ -514,10 +556,50 @@ XZ Utils Installation
                                 sandboxing. If pledge(2) isn't found,
                                 configure will give an error.
 
-    --enable-symbol-versions
-                Use symbol versioning for liblzma. This is enabled by
-                default on GNU/Linux, other GNU-based systems, and
-                FreeBSD.
+                        landlock
+                                Use Landlock (Linux >= 5.13) for
+                                sandboxing. If no Landlock support
+                                is found, configure will give an error.
+
+    --enable-symbol-versions[=VARIANT]
+                Use symbol versioning for liblzma shared library.
+                This is enabled by default on GNU/Linux (glibc only),
+                other GNU-based systems, and FreeBSD.
+
+                Symbol versioning is never used for static liblzma. This
+                option is ignored when not building a shared library.
+
+                Supported VARIANTs:
+
+                        no      Disable symbol versioning. This is the
+                                same as using --disable-symbol-versions.
+
+                        auto    Autodetect between "no", "linux",
+                                and "generic".
+
+                        yes     Autodetect between "linux" and
+                                "generic". This forces symbol
+                                versioning to be used when
+                                building a shared library.
+
+                        generic Generic version is the default for
+                                FreeBSD and GNU/Linux on MicroBlaze.
+
+                                This is also used on GNU/Linux when
+                                building with NVIDIA HPC Compiler
+                                because the compiler doesn't support
+                                the features required for the "linux"
+                                variant below.
+
+                        linux   Special version for GNU/Linux (glibc
+                                only). This adds a few extra symbol
+                                versions for compatibility with binaries
+                                that have been linked against a liblzma
+                                version that has been patched with
+                                "xz-5.2.2-compat-libs.patch" from
+                                RHEL/CentOS 7. That patch was used
+                                by some build tools outside of
+                                RHEL/CentOS 7 too.
 
     --enable-debug
                 This enables the assert() macro and possibly some other

Makefile.am

@@ -1,9 +1,5 @@
-##
+## SPDX-License-Identifier: 0BSD
 ## Author: Lasse Collin
-##
-## This file has been put into the public domain.
-## You can do whatever you want with this file.
-##
 
 # Use -n to prevent gzip from adding a timestamp to the .gz headers.
 GZIP_ENV = -9n
@@ -21,11 +17,11 @@ if COND_DOC
 dist_doc_DATA = \
 	AUTHORS \
 	COPYING \
+	COPYING.0BSD \
 	COPYING.GPLv2 \
 	NEWS \
 	README \
 	THANKS \
-	TODO \
 	doc/faq.txt \
 	doc/history.txt \
 	doc/xz-file-format.txt \
@@ -38,13 +34,9 @@ dist_examples_DATA = \
 	doc/examples/02_decompress.c \
 	doc/examples/03_compress_custom.c \
 	doc/examples/04_compress_easy_mt.c \
+	doc/examples/11_file_info.c \
 	doc/examples/Makefile
 
-examplesolddir = $(docdir)/examples_old
-dist_examplesold_DATA = \
-	doc/examples_old/xz_pipe_comp.c \
-	doc/examples_old/xz_pipe_decomp.c
-
 # Install the Doxygen generated documentation if they were built.
 install-data-local:
 	if test -d "$(srcdir)/doc/api" ; then \
@@ -59,22 +51,25 @@ uninstall-local:
 endif
 
 EXTRA_DIST = \
-	po4a \
-	extra \
+	cmake \
 	dos \
 	doxygen \
+	extra \
+	po4a \
 	windows \
-	macosx \
-	cmake \
 	CMakeLists.txt \
-	autogen.sh \
+	COPYING.CC-BY-SA-4.0 \
 	COPYING.GPLv2 \
 	COPYING.GPLv3 \
 	COPYING.LGPLv2.1 \
 	INSTALL.generic \
 	PACKAGERS \
+	TODO \
+	autogen.sh \
 	build-aux/manconv.sh \
-	build-aux/version.sh
+	build-aux/version.sh \
+	doc/xz-logo.png \
+	po/xz.pot-header
 
 ACLOCAL_AMFLAGS = -I m4
 
@@ -93,7 +88,7 @@ manfiles = \
 dist-hook:
 	if test -d "$(srcdir)/.git" && type git > /dev/null 2>&1; then \
 		( cd "$(srcdir)" && git log --date=iso --stat \
-			6060f7dc76fd6c2a8a1f8e85d0e4d86bb78273e6^..HEAD ) \
+			b69da6d4bb6bb11fc0cf066920791990d2b22a06^..HEAD ) \
 			> "$(distdir)/ChangeLog"; \
 	fi
 	if type groff > /dev/null 2>&1 && type ps2pdf > /dev/null 2>&1; then \

NEWS

@@ -2,6 +2,415 @@
 XZ Utils Release Notes
 ======================
 
+5.6.1 (2024-03-09)
+
+    * liblzma: Fixed two bugs relating to GNU indirect function (IFUNC)
+      with GCC. The more serious bug caused a program linked with
+      liblzma to crash on start up if the flag -fprofile-generate was
+      used to build liblzma. The second bug caused liblzma to falsely
+      report an invalid write to Valgrind when loading liblzma.
+
+    * xz: Changed the messages for thread reduction due to memory
+      constraints to only appear under the highest verbosity level.
+
+    * Build:
+
+        - Fixed a build issue when the header file <linux/landlock.h>
+          was present on the system but the Landlock system calls were
+          not defined in <sys/syscall.h>.
+
+        - The CMake build now warns and disables NLS if both gettext
+          tools and pre-created .gmo files are missing. Previously,
+          this caused the CMake build to fail.
+
+    * Minor improvements to man pages.
+
+    * Minor improvements to tests.
+
+
+5.6.0 (2024-02-24)
+
+    This bumps the minor version of liblzma because new features were
+    added. The API and ABI are still backward compatible with liblzma
+    5.4.x and 5.2.x and 5.0.x.
+
+    NOTE: As described in the NEWS for 5.5.2beta, the core components
+    are now under the BSD Zero Clause License (0BSD).
+
+    Since 5.5.2beta:
+
+    * liblzma:
+
+        - Disabled the branchless C variant in the LZMA decoder based
+          on the benchmark results from the community.
+
+        - Disabled x86-64 inline assembly on x32 to fix the build.
+
+    * Sandboxing support in xz:
+
+        - Landlock is now used even when xz needs to create files.
+          In this case the sandbox has to be more permissive than
+          when no files need to be created. A similar thing was
+          already in use with pledge(2) since 5.3.4alpha.
+
+        - Landlock and pledge(2) are now stricter when reading from
+          more than one input file and only writing to standard output.
+
+        - Added support for Landlock ABI version 4.
+
+    * CMake:
+
+        - Default to -O2 instead of -O3 with CMAKE_BUILD_TYPE=Release.
+          -O3 is not useful for speed and makes the code larger.
+
+        - Now builds lzmainfo and lzmadec.
+
+        - xzdiff, xzgrep, xzless, xzmore, and their symlinks are now
+          installed. The scripts are also tested during "make test".
+
+        - Added translation support for xz, lzmainfo, and the
+          man pages.
+
+        - Applied the symbol versioning workaround for MicroBlaze that
+          is used in the Autotools build.
+
+        - The general XZ Utils and liblzma API documentation is now
+          installed.
+
+        - The CMake component names were changed a little and several
+          were added. liblzma_Runtime and liblzma_Development are
+          unchanged.
+
+        - Minimum required CMake version is now 3.14. However,
+          translation support is disabled with CMake versions
+          older than 3.20.
+
+        - The CMake-based build is now close to feature parity with the
+          Autotools-based build. Most importantly a few tests aren't
+          run yet. Testing the CMake-based build on different operating
+          systems would be welcome now. See the comment at the top of
+          CMakeLists.txt.
+
+    * Fixed a bug in the Autotools feature test for ARM64 CRC32
+      instruction support for old versions of Clang. This did not
+      affect the CMake build.
+
+    * Windows:
+
+        - The build instructions in INSTALL and windows/INSTALL*.txt
+          were revised completely.
+
+        - windows/build-with-cmake.bat along with the instructions
+          in windows/INSTALL-MinGW-w64_with_CMake.txt should make
+          it very easy to build liblzma.dll and xz.exe on Windows
+          using CMake and MinGW-w64 with either GCC or Clang/LLVM.
+
+        - windows/build.bash was updated. It now works on MSYS2 and
+          on GNU/Linux (cross-compiling) to create a .zip and .7z
+          package for 32-bit and 64-bit x86 using GCC + MinGW-w64.
+
+    * The TODO file is no longer installed as part of the
+      documentation. The file is out of date and does not reflect
+      the actual tasks that will be completed in the future.
+
+    * Translations:
+
+        - Translated lzmainfo man pages are now installed. These
+          had been forgotten in earlier versions.
+
+        - Updated Croatian, Esperanto, German, Hungarian, Korean,
+          Polish, Romanian, Spanish, Swedish, Vietnamese, and Ukrainian
+          translations.
+
+        - Updated German, Korean, Romanian, and Ukrainian man page
+          translations.
+
+    * Added a few tests.
+
+    Summary of new features added in the 5.5.x development releases:
+
+    * liblzma:
+
+        - LZMA decoder: Speed optimizations to the C code and
+          added GCC & Clang compatible inline assembly for x86-64.
+
+        - Added lzma_mt_block_size() to recommend a Block size for
+          multithreaded encoding.
+
+        - Added CLMUL-based CRC32 on x86-64 and E2K with runtime
+          processor detection. Similar to CRC64, on 32-bit x86 it
+          isn't available unless --disable-assembler is used.
+
+        - Optimized the CRC32 calculation on ARM64 platforms using the
+          CRC32 instructions. Runtime detection for the instruction is
+          used on GNU/Linux, FreeBSD, Windows, and macOS. If the
+          compiler flags indicate unconditional CRC32 instruction
+          support (+crc) then the generic version is not built.
+
+        - Added definitions of mask values like
+          LZMA_INDEX_CHECK_MASK_CRC32 to <lzma/index.h>.
+
+    * xz:
+
+        - Multithreaded mode is now the default. This improves
+          compression speed and creates .xz files that can be
+          decompressed in multithreaded mode. The downsides are
+          increased memory usage and slightly worse compression ratio.
+
+        - Added a new command line option --filters to set the filter
+          chain using the liblzma filter string syntax.
+
+        - Added new command line options --filters1 ... --filters9 to
+          set additional filter chains using the liblzma filter string
+          syntax. The --block-list option now allows specifying filter
+          chains that were set using these new options.
+
+        - Ported the command line tools to Windows MSVC.
+          Visual Studio 2015 or later is required.
+
+    * Added lz4 support to xzdiff/xzcmp and xzgrep.
+
+
+5.5.2beta (2024-02-14)
+
+    * Licensing change: The core components are now under the
+      BSD Zero Clause License (0BSD). In XZ Utils 5.4.6 and older
+      and 5.5.1alpha these components are in the public domain and
+      obviously remain so; the change affects the new releases only.
+
+      0BSD is an extremely permissive license which doesn't require
+      retaining or reproducing copyright or license notices when
+      distributing the code, thus in practice there is extremely
+      little difference to public domain.
+
+    * liblzma
+
+        - Significant speed optimizations to the LZMA decoder were
+          made. There are now three variants that can be chosen at
+          build time:
+
+            * Basic C version: This is a few percent faster than
+              5.4.x due to some new optimizations.
+
+            * Branchless C: This is currently the default on platforms
+              for which there is no assembly code. This should be a few
+              percent faster than the basic C version.
+
+            * x86-64 inline assembly. This works with GCC and Clang.
+
+          The default choice can currently be overridden by setting
+          LZMA_RANGE_DECODER_CONFIG in CPPFLAGS: 0 means the basic
+          version and 3 means that branchless C version.
+
+        - Optimized the CRC32 calculation on ARM64 platforms using the
+          CRC32 instructions. The instructions are optional in ARMv8.0
+          and are required in ARMv8.1 and later. Runtime detection for
+          the instruction is used on GNU/Linux, FreeBSD, Windows, and
+          macOS. If the compiler flags indicate unconditional CRC32
+          instruction support (+crc) then the generic version is not
+          built.
+
+    * Added lz4 support to xzdiff/xzcmp and xzgrep.
+
+    * Man pages of xzdiff/xzcmp, xzgrep, and xzmore were rewritten
+      to simplify licensing of the man page translations.
+
+    * Translations:
+
+        - Updated Chinese (simplified), German, Korean, Polish,
+          Romanian, Spanish, Swedish, and Ukrainian translations.
+
+        - Updated German, Korean, Romanian, and Ukrainian man page
+          translations.
+
+    * Small improvements to the tests.
+
+    * Added doc/examples/11_file_info.c. It was added to the Git
+      repository in 2017 but forgotten to be added into distribution
+      tarballs.
+
+    * Removed doc/examples_old. These were from 2012.
+
+    * Removed the macos/build.sh script. It had not been updated
+      since 2013.
+
+
+5.5.1alpha (2024-01-26)
+
+    * Added a new filter for RISC-V binaries. The filter can be used
+      for 32-bit and 64-bit binaries with either little or big
+      endianness. In liblzma, the Filter ID is LZMA_FILTER_RISCV (0x0B)
+      and the xz option is --riscv. liblzma filter string syntax
+      recognizes this filter as "riscv".
+
+    * liblzma:
+
+        - Added lzma_mt_block_size() to recommend a Block size for
+          multithreaded encoding
+
+        - Added CLMUL-based CRC32 on x86-64 and E2K with runtime
+          processor detection. Similar to CRC64, on 32-bit x86 it
+          isn't available unless --disable-assembler is used.
+
+        - Implemented GNU indirect function (IFUNC) as a runtime
+          function dispatching method for CRC32 and CRC64 fast
+          implementations on x86. Only GNU/Linux (glibc) and FreeBSD
+          builds will use IFUNC, unless --enable-ifunc is specified to
+          configure.
+
+        - Added definitions of mask values like
+          LZMA_INDEX_CHECK_MASK_CRC32 to <lzma/index.h>.
+
+        - The XZ logo is now included in the Doxygen generated
+          documentation. It is licensed under Creative Commons
+          Attribution-ShareAlike 4.0.
+
+    * xz:
+
+        - Multithreaded mode is now the default. This improves
+          compression speed and creates .xz files that can be
+          decompressed multithreaded at the cost of increased memory
+          usage and slightly worse compression ratio.
+
+        - Added new command line option --filters to set the filter
+          chain using liblzma filter string syntax.
+
+        - Added new command line options --filters1 ... --filters9 to
+          set additional filter chains using liblzma filter string
+          syntax. The --block-list option now allows specifying filter
+          chains that were set using these new options.
+
+        - Added support for Linux Landlock as a sandboxing method.
+
+        - xzdec now supports pledge(2), Capsicum, and Linux Landlock as
+          sandboxing methods.
+
+        - Progress indicator time stats remain accurate after pausing
+          xz with SIGTSTP.
+
+        - Ported xz and xzdec to Windows MSVC. Visual Studio 2015 or
+          later is required.
+
+    * CMake Build:
+
+        - Supports pledge(2), Capsicum, and Linux Landlock sandboxing
+          methods.
+
+        - Replacement functions for getopt_long() are used on platforms
+          that do not have it.
+
+    * Enabled unaligned access by default on PowerPC64LE and on RISC-V
+      targets that define __riscv_misaligned_fast.
+
+    * Tests:
+
+        - Added two new fuzz targets to OSS-Fuzz.
+
+        - Implemented Continuous Integration (CI) testing using
+          GitHub Actions.
+
+    * Changed quoting style from `...' to '...' in all messages,
+      scripts, and documentation.
+
+    * Added basic Codespell support to help catch typo errors.
+
+
+5.4.6 (2024-01-26)
+
+    * Fixed a bug involving internal function pointers in liblzma not
+      being initialized to NULL. The bug can only be triggered if
+      lzma_filters_update() is called on a LZMA1 encoder, so it does
+      not affect xz or any application known to us that uses liblzma.
+
+    * xz:
+
+        - Fixed a regression introduced in 5.4.2 that caused encoding
+          in the raw format to unnecessarily fail if --suffix was not
+          used. For instance, the following command no longer reports
+          that --suffix must be used:
+
+              echo foo | xz --format=raw --lzma2 | wc -c
+
+        - Fixed an issue on MinGW-w64 builds that prevented reading
+          from or writing to non-terminal character devices like NUL.
+
+    * Added a new test.
+
+
+5.4.5 (2023-11-31)
+
+    * liblzma:
+
+        - Use __attribute__((__no_sanitize_address__)) to avoid address
+          sanitization with CRC64 CLMUL. It uses 16-byte-aligned reads
+          which can extend past the bounds of the input buffer and
+          inherently trigger address sanitization errors. This isn't
+          a bug.
+
+        - Fixed an assertion failure that could be triggered by a large
+          unpadded_size argument. It was verified that there was no
+          other bug than the assertion failure.
+
+        - Fixed a bug that prevented building with Windows Vista
+          threading when __attribute__((__constructor__)) is not
+          supported.
+
+    * xz now properly handles special files such as "con" or "nul" on
+      Windows. Before this fix, the following wrote "foo" to the
+      console and deleted the input file "con_xz":
+
+          echo foo | xz > con_xz
+          xz --suffix=_xz --decompress con_xz
+
+    * Build systems:
+
+        - Allow builds with Windows win95 threading and small mode when
+          __attribute__((__constructor__)) is supported.
+
+        - Added a new line to liblzma.pc for MSYS2 (Windows):
+
+              Cflags.private: -DLZMA_API_STATIC
+
+          When compiling code that will link against static liblzma,
+          the LZMA_API_STATIC macro needs to be defined on Windows.
+
+        - CMake specific changes:
+
+            * Fixed a bug that allowed CLOCK_MONOTONIC to be used even
+              if the check for it failed.
+
+            * Fixed a bug where configuring CMake multiple times
+              resulted in HAVE_CLOCK_GETTIME and HAVE_CLOCK_MONOTONIC
+              not being set.
+
+            * Fixed the build with MinGW-w64-based Clang/LLVM 17.
+              llvm-windres now has more accurate GNU windres emulation
+              so the GNU windres workaround from 5.4.1 is needed with
+              llvm-windres version 17 too.
+
+            * The import library on Windows is now properly named
+              "liblzma.dll.a" instead of "libliblzma.dll.a"
+
+            * Fixed a bug causing the Ninja Generator to fail on
+              UNIX-like systems. This bug was introduced in 5.4.0.
+
+            * Added a new option to disable CLMUL CRC64.
+
+            * A module-definition (.def) file is now created when
+              building liblzma.dll with MinGW-w64.
+
+            * The pkg-config liblzma.pc file is now installed on all
+              builds except when using MSVC on Windows.
+
+            * Added large file support by default for platforms that
+              need it to handle files larger than 2 GiB. This includes
+              MinGW-w64, even 64-bit builds.
+
+    * Small fixes and improvements to the tests.
+
+    * Updated translations: Chinese (simplified) and Esperanto.
+
+
 5.4.4 (2023-08-02)
 
     * liblzma and xzdec can now build against WASI SDK when threading

PACKAGERS

@@ -124,14 +124,15 @@ Information to packagers of XZ Utils
 
     If the package manager supports a license field, you probably should
     put GPLv2+ there (GNU GPL v2 or later). The interesting parts of
-    XZ Utils are in the public domain, but some less important files
-    ending up into the binary package are under GPLv2+. So it is simplest
-    to just say GPLv2+ if you cannot specify "public domain and GPLv2+".
+    XZ Utils are under the BSD Zero Clause License (0BSD), but some less
+    important files ending up into the binary package are under GPLv2+.
+    So it is simplest to just say GPLv2+ if you cannot specify
+    "BSD0 and GPLv2+".
 
     If you split XZ Utils into multiple packages as described earlier
     in this file, liblzma and liblzma-dev packages will contain only
-    public domain code (from XZ Utils at least; compiler or linker may
-    add some third-party code, which may be copyrighted).
+    0BSD-licensed code from XZ Utils (compiler or linker may add some
+    third-party code which may have other licenses).
 
 
 4. configure options

README

@@ -69,15 +69,18 @@ XZ Utils
 
     README                This file
 
-    INSTALL.generic     Generic install instructions for those not familiar
-                        with packages using GNU Autotools
+    INSTALL.generic       Generic install instructions for those not
+                          familiar with packages using GNU Autotools
     INSTALL               Installation instructions specific to XZ Utils
     PACKAGERS             Information to packagers of XZ Utils
 
     COPYING               XZ Utils copyright and license information
+    COPYING.0BSD          BSD Zero Clause License
     COPYING.GPLv2         GNU General Public License version 2
     COPYING.GPLv3         GNU General Public License version 3
     COPYING.LGPLv2.1      GNU Lesser General Public License version 2.1
+    COPYING.CC-BY-SA-4.0  Creative Commons Attribution-ShareAlike 4.0
+                          International Public License
 
     AUTHORS               The main authors of XZ Utils
     THANKS                Incomplete list of people who have helped making
@@ -287,11 +290,11 @@ XZ Utils
     XZ Embedded is a limited implementation written for use in the Linux
     kernel, but it is also suitable for other embedded use.
 
-        https://tukaani.org/xz/embedded.html
+        https://xz.tukaani.org/xz-embedded/
 
     XZ for Java is a complete implementation written in pure Java.
 
-        https://tukaani.org/xz/java.html
+        https://xz.tukaani.org/xz-for-java/
 
 
 6. Contact information

THANKS

@@ -5,6 +5,7 @@ Thanks
 Some people have helped more, some less, but nevertheless everyone's help
 has been important. :-) In alphabetical order:
   - Mark Adler
+  - Kian-Meng Ang
   - H. Peter Anvin
   - Jeff Bastian
   - Nelson H. F. Beebe
@@ -51,6 +52,7 @@ has been important. :-) In alphabetical order:
   - Bjarni Ingi Gislason
   - John Paul Adrian Glaubitz
   - Bill Glessner
+  - Matthew Good
   - Michał Górny
   - Jason Gorski
   - Juan Manuel Guerrero
@@ -74,6 +76,7 @@ has been important. :-) In alphabetical order:
   - Richard Koch
   - Anton Kochkov
   - Ville Koskinen
+  - Sergey Kosukhin
   - Marcin Kowalczyk
   - Jan Kratochvil
   - Christian Kujau
@@ -92,6 +95,7 @@ has been important. :-) In alphabetical order:
   - Lorenzo De Liso
   - H.J. Lu
   - Bela Lubkin
+  - Chenxi Mao
   - Gregory Margo
   - Julien Marrec
   - Ed Maste
@@ -149,10 +153,11 @@ has been important. :-) In alphabetical order:
   - Dan Stromberg
   - Jia Tan
   - Vincent Torri
+  - Alexey Tourbin
   - Paul Townsend
   - Mohammed Adnène Trojette
-  - Alexey Tourbin
   - Taiki Tsunekawa
+  - Maksym Vatsyk
   - Loganaden Velvindron
   - Patrick J. Volkerding
   - Martin Väth
@@ -167,6 +172,7 @@ has been important. :-) In alphabetical order:
   - Charles Wilson
   - Lars Wirzenius
   - Pilorz Wojciech
+  - Chien Wong
   - Ryan Young
   - Andreas Zieringer
 

autogen.sh

@@ -1,12 +1,10 @@
 #!/bin/sh
+# SPDX-License-Identifier: 0BSD
 
 ###############################################################################
 #
 # Author: Lasse Collin
 #
-# This file has been put into the public domain.
-# You can do whatever you want with this file.
-#
 ###############################################################################
 
 set -e -x

build-aux/ci_build.sh

@@ -1,5 +1,6 @@
 #!/bin/bash
-#
+# SPDX-License-Identifier: 0BSD
+
 #############################################################################
 #
 # Script meant to be used for Continuous Integration automation for POSIX
@@ -9,9 +10,6 @@
 #
 # Author: Jia Tan
 #
-# This file has been put into the public domain.
-# You can do whatever you want with this file.
-#
 #############################################################################
 
 set -e
@@ -20,9 +18,10 @@ USAGE="Usage: $0
   -a [autogen flags]
   -b [autotools|cmake]
   -c [crc32|crc64|sha256]
-  -d [encoders|decoders|bcj|delta|threads|shared|nls|small|ifunc|clmul]
+  -d [encoders|decoders|bcj|delta|threads|shared|nls|small|ifunc|clmul|sandbox]
   -f [CFLAGS]
   -l [destdir]
+  -m [compiler]
   -n [ARTIFACTS_DIR_NAME]
   -p [all|build|test]
   -s [srcdir]"
@@ -44,6 +43,7 @@ NATIVE_LANG_SUPPORT="y"
 SMALL="n"
 IFUNC="y"
 CLMUL="y"
+SANDBOX="y"
 SRC_DIR="$ABS_DIR/../"
 DEST_DIR="$SRC_DIR/../xz_build"
 PHASE="all"
@@ -54,7 +54,7 @@ ARTIFACTS_DIR_NAME="output"
 # Parse arguments #
 ###################
 
-while getopts a:b:c:d:l:n:s:p:f:h opt; do
+while getopts a:b:c:d:l:m:n:s:p:f:h opt; do
 	# b option can have either value "autotools" OR "cmake"
 	case ${opt} in
 	h)
@@ -89,12 +89,17 @@ while getopts a:b:c:d:l:n:s:p:f:h opt; do
 		small) SMALL="y";;
 		ifunc) IFUNC="n";;
 		clmul) CLMUL="n";;
+		sandbox) SANDBOX="n";;
 		*) echo "Invalid disable value: $disable_arg"; exit 1 ;;
 		esac
 	done
 	;;
 	l) DEST_DIR="$OPTARG"
 	;;
+	m)
+		CC="$OPTARG"
+		export CC
+	;;
 	n) ARTIFACTS_DIR_NAME="$OPTARG"
 	;;
 	s) SRC_DIR="$OPTARG"
@@ -197,7 +202,7 @@ then
 
 		cd "$DEST_DIR"
 
-		add_to_filter_list "$BCJ" ",x86,powerpc,ia64,arm,armthumb,arm64,sparc"
+		add_to_filter_list "$BCJ" ",x86,powerpc,ia64,arm,armthumb,arm64,sparc,riscv"
 		add_to_filter_list "$DELTA" ",delta"
 
 		add_extra_option "$ENCODERS" "--enable-encoders=$FILTER_LIST" "--disable-encoders"
@@ -208,6 +213,7 @@ then
 		add_extra_option "$SMALL" "--enable-small" ""
 		add_extra_option "$IFUNC" "" "--disable-ifunc"
 		add_extra_option "$CLMUL" "" "--disable-clmul-crc"
+		add_extra_option "$SANDBOX" "" "--enable-sandbox=no"
 
 		# Run configure script
 		"$SRC_DIR"/configure --enable-werror --enable-checks="$CHECK_TYPE" $EXTRA_OPTIONS --config-cache
@@ -218,7 +224,7 @@ then
 	cmake)
 		cd "$DEST_DIR"
 
-		add_to_filter_list "$BCJ" ";x86;powerpc;ia64;arm;armthumb;arm64;sparc"
+		add_to_filter_list "$BCJ" ";x86;powerpc;ia64;arm;armthumb;arm64;sparc;riscv"
 		add_to_filter_list "$DELTA" ";delta"
 
 		add_extra_option "$THREADS" "-DENABLE_THREADS=ON" "-DENABLE_THREADS=OFF"
@@ -234,6 +240,10 @@ then
 
 		add_extra_option "$SMALL" "-DHAVE_SMALL=ON" ""
 
+		if test -n "$CC" ; then
+			EXTRA_OPTIONS="$EXTRA_OPTIONS -DCMAKE_C_COMPILER=$CC"
+		fi
+
 		# Remove old cache file to clear previous settings.
 		rm -f "CMakeCache.txt"
 		cmake "$SRC_DIR/CMakeLists.txt" -B "$DEST_DIR" $EXTRA_OPTIONS -DADDITIONAL_CHECK_TYPES="$CHECK_TYPE" -G "Unix Makefiles"

build-aux/manconv.sh

@@ -1,5 +1,6 @@
 #!/bin/sh
-#
+# SPDX-License-Identifier: 0BSD
+
 ###############################################################################
 #
 # Wrapper for GNU groff to convert man pages to a few formats
@@ -17,9 +18,6 @@
 #
 # Author: Lasse Collin
 #
-# This file has been put into the public domain.
-# You can do whatever you want with this file.
-#
 ###############################################################################
 
 FORMAT=$1

build-aux/version.sh

@@ -1,5 +1,6 @@
 #!/bin/sh
-#
+# SPDX-License-Identifier: 0BSD
+
 #############################################################################
 #
 # Get the version string from version.h and print it out without
@@ -9,9 +10,6 @@
 #
 # Author: Lasse Collin
 #
-# This file has been put into the public domain.
-# You can do whatever you want with this file.
-#
 #############################################################################
 
 sed -n 's/LZMA_VERSION_STABILITY_ALPHA/alpha/

cmake/remove-ordinals.cmake

@@ -0,0 +1,25 @@
+# SPDX-License-Identifier: 0BSD
+
+#############################################################################
+#
+# remove-ordinals.cmake
+#
+# Removes the ordinal numbers from a DEF file that has been created by
+# GNU ld or LLVM lld option --output-def (when creating a Windows DLL).
+# This should be equivalent: sed 's/ \+@ *[0-9]\+//'
+#
+# Usage:
+#
+#     cmake -DINPUT_FILE=infile.def.in \
+#           -DOUTPUT_FILE=outfile.def \
+#           -P remove-ordinals.cmake
+#
+#############################################################################
+#
+# Author: Lasse Collin
+#
+#############################################################################
+
+file(READ "${INPUT_FILE}" STR)
+string(REGEX REPLACE " +@ *[0-9]+" "" STR "${STR}")
+file(WRITE "${OUTPUT_FILE}" "${STR}")

cmake/tuklib_common.cmake

@@ -1,11 +1,12 @@
+# SPDX-License-Identifier: 0BSD
+
+#############################################################################
 #
 # tuklib_common.cmake - common functions and macros for tuklib_*.cmake files
 #
 # Author: Lasse Collin
 #
-# This file has been put into the public domain.
-# You can do whatever you want with this file.
-#
+#############################################################################
 
 function(tuklib_add_definitions TARGET_OR_ALL DEFINITIONS)
     # DEFINITIONS may be an empty string/list but it's fine here. There is

cmake/tuklib_cpucores.cmake

@@ -1,11 +1,12 @@
+# SPDX-License-Identifier: 0BSD
+
+#############################################################################
 #
 # tuklib_cpucores.cmake - see tuklib_cpucores.m4 for description and comments
 #
 # Author: Lasse Collin
 #
-# This file has been put into the public domain.
-# You can do whatever you want with this file.
-#
+#############################################################################
 
 include("${CMAKE_CURRENT_LIST_DIR}/tuklib_common.cmake")
 include(CheckCSourceCompiles)

cmake/tuklib_integer.cmake

@@ -1,11 +1,12 @@
+# SPDX-License-Identifier: 0BSD
+
+#############################################################################
 #
 # tuklib_integer.cmake - see tuklib_integer.m4 for description and comments
 #
 # Author: Lasse Collin
 #
-# This file has been put into the public domain.
-# You can do whatever you want with this file.
-#
+#############################################################################
 
 include("${CMAKE_CURRENT_LIST_DIR}/tuklib_common.cmake")
 include(TestBigEndian)
@@ -59,25 +60,64 @@ function(tuklib_integer TARGET_OR_ALL)
         endif()
     endif()
 
-    # Unaligned access is fast on x86(-64), big endian PowerPC, and usually on
-    # 32/64-bit ARM too. There are others too and ARM could be a false match.
+    # Guess that unaligned access is fast on these archs:
+    #   - 32/64-bit x86 / x86-64
+    #   - 32/64-bit big endian PowerPC
+    #   - 64-bit little endian PowerPC
+    #   - Some 32-bit ARM
+    #   - Some 64-bit ARM64 (AArch64)
+    #   - Some 32/64-bit RISC-V
     #
-    # Guess the default value for the option.
-    # CMake's ability to give info about the target arch seems bad.
-    # The the same arch can have different name depending on the OS.
-    #
-    # FIXME: The regex is based on guessing, not on factual information!
-    #
-    # NOTE: Compared to the Autoconf test, this lacks the GCC/Clang test
-    #       on ARM and always assumes that unaligned is fast on ARM.
+    # CMake doesn't provide a standardized/normalized list of processor arch
+    # names. For example, x86-64 may be "x86_64" (Linux), "AMD64" (Windows),
+    # or even "EM64T" (64-bit WinXP).
     set(FAST_UNALIGNED_GUESS OFF)
-    if(CMAKE_SYSTEM_PROCESSOR MATCHES
-       "[Xx3456]86|^[Xx]64|^[Aa][Mm][Dd]64|^[Aa][Rr][Mm]|^aarch|^powerpc|^ppc")
-        if(NOT WORDS_BIGENDIAN OR
-           NOT CMAKE_SYSTEM_PROCESSOR MATCHES "^powerpc|^ppc")
+    string(TOLOWER "${CMAKE_SYSTEM_PROCESSOR}" PROCESSOR)
+
+    # There is no ^ in the first regex branch to allow "i" at the beginning
+    # so it can match "i386" to "i786", and "x86_64".
+    if(PROCESSOR MATCHES "[x34567]86|^x64|^amd64|^em64t")
+        set(FAST_UNALIGNED_GUESS ON)
+
+    elseif(PROCESSOR MATCHES "^powerpc|^ppc")
+        if(WORDS_BIGENDIAN OR PROCESSOR MATCHES "64")
+            set(FAST_UNALIGNED_GUESS ON)
+        endif()
+
+    elseif(PROCESSOR MATCHES "^arm|^aarch64|^riscv")
+        # On 32-bit and 64-bit ARM, GCC and Clang
+        # #define __ARM_FEATURE_UNALIGNED if
+        # unaligned access is supported.
+        #
+        # Exception: GCC at least up to 13.2.0
+        # defines it even when using -mstrict-align
+        # so in that case this autodetection goes wrong.
+        # Most of the time -mstrict-align isn't used so it
+        # shouldn't be a common problem in practice. See:
+        # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111555
+        #
+        # RISC-V C API Specification says that if
+        # __riscv_misaligned_fast is defined then
+        # unaligned access is known to be fast.
+        #
+        # MSVC is handled as a special case: We assume that
+        # 32/64-bit ARM supports fast unaligned access.
+        # If MSVC gets RISC-V support then this will assume
+        # fast unaligned access on RISC-V too.
+        check_c_source_compiles("
+                #if !defined(__ARM_FEATURE_UNALIGNED) \
+                        && !defined(__riscv_misaligned_fast) \
+                        && !defined(_MSC_VER)
+                compile error
+                #endif
+                int main(void) { return 0; }
+            "
+            TUKLIB_FAST_UNALIGNED_DEFINED_BY_PREPROCESSOR)
+        if(TUKLIB_FAST_UNALIGNED_DEFINED_BY_PREPROCESSOR)
             set(FAST_UNALIGNED_GUESS ON)
         endif()
     endif()
+
     option(TUKLIB_FAST_UNALIGNED_ACCESS
            "Enable if the system supports *fast* unaligned memory access \
 with 16-bit, 32-bit, and 64-bit integers."

cmake/tuklib_large_file_support.cmake

@@ -0,0 +1,53 @@
+# SPDX-License-Identifier: 0BSD
+
+#############################################################################
+#
+# tuklib_large_file_support.cmake
+#
+# If off_t is less than 64 bits by default and -D_FILE_OFFSET_BITS=64
+# makes off_t become 64-bit, the CMake option LARGE_FILE_SUPPORT is
+# provided (ON by default) and -D_FILE_OFFSET_BITS=64 is added to
+# the compile definitions if LARGE_FILE_SUPPORT is ON.
+#
+# Author: Lasse Collin
+#
+#############################################################################
+
+include("${CMAKE_CURRENT_LIST_DIR}/tuklib_common.cmake")
+include(CheckCSourceCompiles)
+
+function(tuklib_large_file_support TARGET_OR_ALL)
+    # MSVC must be handled specially in the C code.
+    if(MSVC)
+        return()
+    endif()
+
+    set(TUKLIB_LARGE_FILE_SUPPORT_TEST
+            "#include <sys/types.h>
+            int foo[sizeof(off_t) >= 8 ? 1 : -1];
+            int main(void) { return 0; }")
+
+    check_c_source_compiles("${TUKLIB_LARGE_FILE_SUPPORT_TEST}"
+                            TUKLIB_LARGE_FILE_SUPPORT_BY_DEFAULT)
+
+    if(NOT TUKLIB_LARGE_FILE_SUPPORT_BY_DEFAULT)
+        cmake_push_check_state()
+        # This needs -D.
+        list(APPEND CMAKE_REQUIRED_DEFINITIONS "-D_FILE_OFFSET_BITS=64")
+        check_c_source_compiles("${TUKLIB_LARGE_FILE_SUPPORT_TEST}"
+                                TUKLIB_LARGE_FILE_SUPPORT_WITH_FOB64)
+        cmake_pop_check_state()
+    endif()
+
+    if(TUKLIB_LARGE_FILE_SUPPORT_WITH_FOB64)
+        # Show the option only when _FILE_OFFSET_BITS=64 affects sizeof(off_t).
+        option(LARGE_FILE_SUPPORT
+               "Use -D_FILE_OFFSET_BITS=64 to support files larger than 2 GiB."
+               ON)
+
+        if(LARGE_FILE_SUPPORT)
+            # This must not use -D.
+            tuklib_add_definitions("${TARGET_OR_ALL}" "_FILE_OFFSET_BITS=64")
+        endif()
+    endif()
+endfunction()

cmake/tuklib_mbstr.cmake

@@ -1,11 +1,12 @@
+# SPDX-License-Identifier: 0BSD
+
+#############################################################################
 #
 # tuklib_mbstr.cmake - see tuklib_mbstr.m4 for description and comments
 #
 # Author: Lasse Collin
 #
-# This file has been put into the public domain.
-# You can do whatever you want with this file.
-#
+#############################################################################
 
 include("${CMAKE_CURRENT_LIST_DIR}/tuklib_common.cmake")
 include(CheckSymbolExists)

cmake/tuklib_physmem.cmake

@@ -1,3 +1,6 @@
+# SPDX-License-Identifier: 0BSD
+
+#############################################################################
 #
 # tuklib_physmem.cmake - see tuklib_physmem.m4 for description and comments
 #
@@ -6,9 +9,7 @@
 #
 # Author: Lasse Collin
 #
-# This file has been put into the public domain.
-# You can do whatever you want with this file.
-#
+#############################################################################
 
 include("${CMAKE_CURRENT_LIST_DIR}/tuklib_common.cmake")
 include(CheckCSourceCompiles)

cmake/tuklib_progname.cmake

@@ -1,11 +1,12 @@
+# SPDX-License-Identifier: 0BSD
+
+#############################################################################
 #
 # tuklib_progname.cmake - see tuklib_progname.m4 for description and comments
 #
 # Author: Lasse Collin
 #
-# This file has been put into the public domain.
-# You can do whatever you want with this file.
-#
+#############################################################################
 
 include("${CMAKE_CURRENT_LIST_DIR}/tuklib_common.cmake")
 include(CheckSymbolExists)

configure.ac

@@ -1,12 +1,11 @@
 #                                               -*- Autoconf -*-
-# Process this file with autoconf to produce a configure script.
+# SPDX-License-Identifier: 0BSD
 
 ###############################################################################
 #
-# Author: Lasse Collin
+# Process this file with autoconf to produce a configure script.
 #
-# This file has been put into the public domain.
-# You can do whatever you want with this file.
+# Author: Lasse Collin
 #
 ###############################################################################
 
@@ -18,7 +17,7 @@
 AC_PREREQ([2.69])
 
 AC_INIT([XZ Utils], m4_esyscmd([/bin/sh build-aux/version.sh]),
-	[xz@tukaani.org], [xz], [https://tukaani.org/xz/])
+	[xz@tukaani.org], [xz], [https://xz.tukaani.org/xz-utils/])
 AC_CONFIG_SRCDIR([src/liblzma/common/common.h])
 AC_CONFIG_AUX_DIR([build-aux])
 AC_CONFIG_MACRO_DIR([m4])
@@ -79,8 +78,8 @@ fi
 # Filters #
 ###########
 
-m4_define([SUPPORTED_FILTERS], [lzma1,lzma2,delta,x86,powerpc,ia64,arm,armthumb,arm64,sparc])dnl
-m4_define([SIMPLE_FILTERS], [x86,powerpc,ia64,arm,armthumb,arm64,sparc])
+m4_define([SUPPORTED_FILTERS], [lzma1,lzma2,delta,x86,powerpc,ia64,arm,armthumb,arm64,sparc,riscv])dnl
+m4_define([SIMPLE_FILTERS], [x86,powerpc,ia64,arm,armthumb,arm64,sparc,riscv])
 m4_define([LZ_FILTERS], [lzma1,lzma2])
 
 m4_foreach([NAME], [SUPPORTED_FILTERS],
@@ -380,6 +379,16 @@ AC_ARG_ENABLE([clmul-crc], AS_HELP_STRING([--disable-clmul-crc],
 	[], [enable_clmul_crc=yes])
 
 
+############################
+# ARM64 CRC32 Instructions #
+############################
+
+AC_ARG_ENABLE([arm64-crc32], AS_HELP_STRING([--disable-arm64-crc32],
+		[Do not use ARM64 CRC32 instructions even if support for it
+		is detected.]),
+	[], [enable_arm64_crc32=yes])
+
+
 #####################
 # Size optimization #
 #####################
@@ -519,20 +528,24 @@ AM_CONDITIONAL([COND_DOC], [test x$enable_doc != xno])
 AC_MSG_CHECKING([if sandboxing should be used])
 AC_ARG_ENABLE([sandbox], [AS_HELP_STRING([--enable-sandbox=METHOD],
 		[Sandboxing METHOD can be
-		'auto', 'no', 'capsicum', or 'pledge'.
+		'auto', 'no', 'capsicum', 'pledge', or 'landlock'.
 		The default is 'auto' which enables sandboxing if
 		a supported sandboxing method is found.])],
 	[], [enable_sandbox=auto])
-case $enable_sandbox in
-	auto)
+case $enable_xzdec-$enable_xz-$enable_sandbox in
+	no-no-*)
+		enable_sandbox=no
+		AC_MSG_RESULT([no, --disable-xz and --disable-xzdec was used])
+		;;
+	*-*-auto)
 		AC_MSG_RESULT([maybe (autodetect)])
 		;;
-	no | capsicum | pledge)
+	*-*-no | *-*-capsicum | *-*-pledge | *-*-landlock)
 		AC_MSG_RESULT([$enable_sandbox])
 		;;
 	*)
 		AC_MSG_RESULT([])
-		AC_MSG_ERROR([--enable-sandbox only accepts 'auto', 'no', 'capsicum', or 'pledge'.])
+		AC_MSG_ERROR([--enable-sandbox only accepts 'auto', 'no', 'capsicum', 'pledge', or 'landlock'.])
 		;;
 esac
 
@@ -606,32 +619,6 @@ AM_PROG_CC_C_O
 AM_PROG_AS
 AC_USE_SYSTEM_EXTENSIONS
 
-# If using GCC or compatible compiler, verify that CFLAGS doesn't contain
-# something that makes -Werror unhappy. It's important to check this after
-# the above check for system extensions. It adds macros that can trigger,
-# for example, -Wunused-macros.
-if test "$GCC" = yes && test "x$SKIP_WERROR_CHECK" != xyes ; then
-	AC_MSG_CHECKING([if the -Werror option is usable])
-	OLD_CFLAGS=$CFLAGS
-	CFLAGS="$CFLAGS -Werror"
-	AC_COMPILE_IFELSE([AC_LANG_SOURCE([[extern int foo; int foo;]])], [
-		AC_MSG_RESULT([yes])
-	], [
-		AC_MSG_RESULT([no])
-		AC_MSG_ERROR([
-    CFLAGS contains something that makes -Werror complain (see config.log).
-    This would break certain checks in 'configure'. It is strongly
-    recommended to modify CFLAGS to fix this. If you want to use noisy
-    warning options, for example, -Weverything, it is still possible to
-    add them later when running 'make': make CFLAGS+=-Weverything
-
-    In case you really want to continue with the current CFLAGS, pass
-    'SKIP_WERROR_CHECK=yes' as an argument to 'configure'.
-		])
-	])
-	CFLAGS=$OLD_CFLAGS
-fi
-
 AS_CASE([$enable_threads],
 	[posix], [
 		echo
@@ -648,21 +635,10 @@ AS_CASE([$enable_threads],
 		AC_DEFINE([MYTHREAD_POSIX], [1],
 			[Define to 1 when using POSIX threads (pthreads).])
 
-		# These are nice to have but not mandatory.
-		#
-		# FIXME: xz uses clock_gettime if it is available and can do
-		# it even when threading is disabled. Moving this outside
-		# of pthread detection may be undesirable because then
-		# liblzma may get linked against librt even when librt isn't
-		# needed by liblzma.
+		# This is nice to have but not mandatory.
 		OLD_CFLAGS=$CFLAGS
 		CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
-		AC_SEARCH_LIBS([clock_gettime], [rt])
-		AC_CHECK_FUNCS([clock_gettime pthread_condattr_setclock])
-		AC_CHECK_DECL([CLOCK_MONOTONIC], [AC_DEFINE(
-			[HAVE_CLOCK_MONOTONIC], [1], [Define to 1 if
-			`CLOCK_MONOTONIC' is declared in <time.h>.])], [],
-			[[#include <time.h>]])
+		AC_CHECK_FUNCS([pthread_condattr_setclock])
 		CFLAGS=$OLD_CFLAGS
 	],
 	[win95], [
@@ -733,23 +709,44 @@ fi
 # --with-pic and --without-pic though. As long as neither --with-pic nor
 # --without-pic is used then we can use #ifdef PIC to detect if the file is
 # being built for a shared library.
-if test "x$enable_symbol_versions" = xno ; then
+AS_IF([test "x$enable_symbol_versions" = xno], [
 	enable_symbol_versions=no
 	AC_MSG_RESULT([no])
-elif test "x$enable_shared" = xno ; then
+], [test "x$enable_shared" = xno], [
 	enable_symbol_versions=no
 	AC_MSG_RESULT([no (not building a shared library)])
-else
+], [
+	# "yes" means that symbol version are to be used but we need to
+	# autodetect which variant to use.
+	if test "x$enable_symbol_versions" = xyes ; then
 		case "$host_cpu-$host_os" in
 			microblaze*)
-			# GCC 12 on MicroBlaze doesn't support __symver__
-			# attribute. It's simplest and safest to use the
-			# generic version on that platform since then only
-			# the linker script is needed. The RHEL/CentOS 7
-			# compatibility symbols don't matter on MicroBlaze.
+				# GCC 12 on MicroBlaze doesn't support
+				# __symver__ attribute. It's simplest and
+				# safest to use the generic version on that
+				# platform since then only the linker script
+				# is needed. The RHEL/CentOS 7 compatibility
+				# symbols don't matter on MicroBlaze.
 				enable_symbol_versions=generic
 				;;
 			*-linux*)
+				# NVIDIA HPC Compiler doesn't support symbol
+				# versioning but the linker script can still
+				# be used.
+				AC_EGREP_CPP([use_generic_symbol_versioning],
+					[#ifdef __NVCOMPILER
+					use_generic_symbol_versioning
+					#endif],
+					[enable_symbol_versions=generic],
+					[enable_symbol_versions=linux])
+				;;
+			*)
+				enable_symbol_versions=generic
+				;;
+		esac
+	fi
+
+	if test "x$enable_symbol_versions" = xlinux ; then
 		case "$pic_mode-$enable_static" in
 			default-*)
 				# Use symvers if PIC is defined.
@@ -770,7 +767,6 @@ else
     possibly picking only src/liblzma/.libs/liblzma.a from the static build.])
 				;;
 		esac
-			enable_symbol_versions=linux
 		AC_DEFINE_UNQUOTED([HAVE_SYMBOL_VERSIONS_LINUX],
 			[$have_symbol_versions_linux],
 			[Define to 1 to if GNU/Linux-specific details
@@ -781,13 +777,12 @@ else
 			time with Libtool if neither --with-pic nor
 			--without-pic is used). This define must be
 			used together with liblzma_linux.map.])
-			;;
-		*)
-			enable_symbol_versions=generic
-			;;
-	esac
+	elif test "x$enable_symbol_versions" != xgeneric ; then
+		AC_MSG_RESULT([])
+		AC_MSG_ERROR([unknown symbol versioning variant '$enable_symbol_versions'])
+	fi
 	AC_MSG_RESULT([yes ($enable_symbol_versions)])
-fi
+])
 
 AM_CONDITIONAL([COND_SYMVERS_LINUX],
 	[test "x$enable_symbol_versions" = xlinux])
@@ -859,6 +854,13 @@ AC_C_BIGENDIAN
 # __attribute__((__constructor__)) can be used for one-time initializations.
 # Use -Werror because some compilers accept unknown attributes and just
 # give a warning.
+#
+# FIXME? Unfortunately -Werror can cause trouble if CFLAGS contains options
+# that produce warnings for unrelated reasons. For example, GCC and Clang
+# support -Wunused-macros which will warn about "#define _GNU_SOURCE 1"
+# which will be among the #defines that Autoconf inserts to the beginning of
+# the test program. There seems to be no nice way to prevent Autoconf from
+# inserting the any defines to the test program.
 AC_MSG_CHECKING([if __attribute__((__constructor__)) can be used])
 have_func_attribute_constructor=no
 OLD_CFLAGS="$CFLAGS"
@@ -866,13 +868,6 @@ CFLAGS="$CFLAGS -Werror"
 AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
 	__attribute__((__constructor__))
 	static void my_constructor_func(void) { return; }
-	/*
-	 * CompCert 3.12 silently ignores unsupported attributes
-	 * if the function appears to be unused. It doesn't consider
-	 * that the unknown attribute might make the function used.
-	 */
-	void call_func(void);
-	void call_func(void) { my_constructor_func(); }
 ]])], [
 	AC_DEFINE([HAVE_FUNC_ATTRIBUTE_CONSTRUCTOR], [1],
 		[Define to 1 if __attribute__((__constructor__))
@@ -890,10 +885,11 @@ CFLAGS="$OLD_CFLAGS"
 # win95, and the compiler does not support attribute constructor, then we
 # would end up with a multithreaded build that is thread-unsafe. As a
 # result this configuration is not allowed.
-if test "x$enable_small$enable_threads$have_func_attribute_constructor"\
+if test "x$enable_small$enable_threads$have_func_attribute_constructor" \
 		= xyeswin95no; then
-	AC_MSG_ERROR([--enable-threads=win95 and --enable-small cannot be
-		used at the same time with a compiler that doesn't support
+	AC_MSG_ERROR([
+    --enable-threads=win95 and --enable-small cannot be used
+    at the same time with a compiler that doesn't support
     __attribute__((__constructor__))])
 fi
 
@@ -901,44 +897,79 @@ fi
 # implementations of the same function at runtime. This is slightly more
 # efficient than using __attribute__((__constructor__)) and setting
 # a function pointer.
-AC_ARG_ENABLE([ifunc], [AS_HELP_STRING([--disable-ifunc],
-		[do not use __attribute__((__ifunc__()))])],
-	[], [enable_ifunc=yes])
+AC_ARG_ENABLE([ifunc], [AS_HELP_STRING([--enable-ifunc],
+		[Use __attribute__((__ifunc__())). Enabled by default on
+		GNU/Linux (glibc) and FreeBSD.])],
+	[], [enable_ifunc=auto])
 
-if test "x$enable_ifunc" = xyes ; then
+# When enable_ifunc is 'auto', allow the use of __attribute__((__ifunc__()))
+# if compiler support is detected and we are building for GNU/Linux (glibc)
+# or FreeBSD. uClibc and musl don't support ifunc in their dynamic linkers
+# but some compilers still accept the attribute when compiling for these
+# C libraries, which results in broken binaries. That's why we need to
+# check which libc is being used.
+if test "x$enable_ifunc" = xauto ; then
 	OLD_CFLAGS="$CFLAGS"
 	CFLAGS="$CFLAGS -Werror"
 	AC_MSG_CHECKING([if __attribute__((__ifunc__())) can be used])
 	AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
+		/*
+		 * Force a compilation error when not using glibc on Linux
+		 * or if we are not using FreeBSD. uClibc will define
+		 * __GLIBC__ but does not support ifunc, so we must have
+		 * an extra check to disable with uClibc.
+		 */
+		#if defined(__linux__)
+		#	include <features.h>
+		#	if !defined(__GLIBC__) || defined(__UCLIBC__)
+				compile error
+		#	endif
+		#elif !defined(__FreeBSD__)
+			compile error
+		#endif
+
 		static void func(void) { return; }
+
+		/*
+		 * The attribute __no_profile_instrument_function__ is
+		 * needed with GCC to prevent improper instrumentation in
+		 * the ifunc resolver.
+		 */
+		__attribute__((__no_profile_instrument_function__))
 		static void (*resolve_func (void)) (void) { return func; }
 		void func_ifunc (void)
 				__attribute__((__ifunc__("resolve_func")));
 		/*
-		 * CompCert 3.12 silently ignores unsupported attributes
-		 * if the function appears to be unused. It doesn't consider
-		 * that the unknown attribute might make the function used.
-		 *
 		 * 'clang -Wall' incorrectly warns that resolve_func is
 		 * unused (-Wunused-function). Correct assembly output is
 		 * still produced. This problem exists at least in Clang
-		 * versions 4 to 17.
-		 *
-		 * The following make CompCert diagnose the unsupported
-		 * attribute and silences the bogus Clang warning:
+		 * versions 4 to 17. The following silences the bogus warning:
 		 */
-		void call_funcs(void);
-		void call_funcs(void) { resolve_func()(); func_ifunc(); }
+		void make_clang_quiet(void);
+		void make_clang_quiet(void) { resolve_func()(); }
 	]])], [
+		enable_ifunc=yes
+	], [
+		enable_ifunc=no
+	])
+
+	AC_MSG_RESULT([$enable_ifunc])
+
+	CFLAGS="$OLD_CFLAGS"
+fi
+
+if test "x$enable_ifunc" = xyes ; then
 	AC_DEFINE([HAVE_FUNC_ATTRIBUTE_IFUNC], [1],
 			[Define to 1 if __attribute__((__ifunc__()))
 			is supported for functions.])
-		AC_MSG_RESULT([yes])
-	], [
-		AC_MSG_RESULT([no])
-	])
 
-	CFLAGS="$OLD_CFLAGS"
+	# ifunc explicitly does not work with -fsanitize=address.
+	# If configured, it will result in a liblzma build that will fail
+	# when liblzma is loaded at runtime (when the ifunc resolver
+	# executes).
+	AS_CASE([$CFLAGS], [*-fsanitize=*], [AC_MSG_ERROR([
+    CFLAGS contains '-fsanitize=' which is incompatible with ifunc.
+    Use --disable-ifunc when using '-fsanitize'.])])
 fi
 
 
@@ -949,6 +980,22 @@ fi
 # Gnulib replacements as needed
 gl_GETOPT
 
+# If clock_gettime() is available, liblzma with pthreads may use it, and
+# xz may use it even when threading support is disabled. In XZ Utils 5.4.x
+# and older, configure checked for clock_gettime() only when using pthreads.
+# This way non-threaded builds of liblzma didn't get a useless dependency on
+# librt which further had a dependency on libpthread. Avoiding these was
+# useful when a small build was needed, for example, for initramfs use.
+#
+# The above reasoning is thoroughly obsolete: On GNU/Linux, librt hasn't
+# been needed for clock_gettime() since glibc 2.17 (2012-12-25).
+# Solaris 10 needs librt but Solaris 11 doesn't anymore.
+AC_SEARCH_LIBS([clock_gettime], [rt])
+AC_CHECK_FUNCS([clock_gettime])
+AC_CHECK_DECL([CLOCK_MONOTONIC], [AC_DEFINE([HAVE_CLOCK_MONOTONIC], [1],
+	[Define to 1 if 'CLOCK_MONOTONIC' is declared in <time.h>.])], [],
+	[[#include <time.h>]])
+
 # Find the best function to set timestamps.
 AC_CHECK_FUNCS([futimens futimes futimesat utimes _futime utime], [break])
 
@@ -1068,21 +1115,121 @@ __m128i my_clmul(__m128i a)
 			[Define to 1 if _mm_set_epi64x and
 			_mm_clmulepi64_si128 are usable.
 			See configure.ac for details.])
-		AC_MSG_RESULT([yes])
+		enable_clmul_crc=yes
 	], [
-		AC_MSG_RESULT([no])
+		enable_clmul_crc=no
 	])
+	AC_MSG_RESULT([$enable_clmul_crc])
 ])
 
+# ARM64 C Language Extensions define CRC32 functions in arm_acle.h.
+# These are supported by at least GCC and Clang which both need
+# __attribute__((__target__("+crc"))), unless the needed compiler flags
+# are used to support the CRC instruction.
+AC_MSG_CHECKING([if ARM64 CRC32 instruction is usable])
+AS_IF([test "x$enable_arm64_crc32" = xno], [
+	AC_MSG_RESULT([no, --disable-arm64-crc32 was used])
+], [
+	# Set -Werror here because some versions of Clang (14 and older)
+	# do not report the unsupported __attribute__((__target__("+crc")))
+	# or __crc32d() as an error, only as a warning. This does not need
+	# to be done with CMake because tests will attempt to link and the
+	# error will be reported then.
+	OLD_CFLAGS="$CFLAGS"
+	CFLAGS="$CFLAGS -Werror"
+
+	AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
+#include <arm_acle.h>
+#include <stdint.h>
+
+#if (defined(__GNUC__) || defined(__clang__)) && !defined(__EDG__)
+__attribute__((__target__("+crc")))
+#endif
+uint32_t my_crc(uint32_t a, uint64_t b)
+{
+	return __crc32d(a, b);
+}
+	]])], [
+		AC_DEFINE([HAVE_ARM64_CRC32], [1],
+			[Define to 1 if ARM64 CRC32 instruction is supported.
+			See configure.ac for details.])
+		enable_arm64_crc32=yes
+	], [
+		enable_arm64_crc32=no
+	])
+	AC_MSG_RESULT([$enable_arm64_crc32])
+
+	CFLAGS="$OLD_CFLAGS"
+])
+
+# Check for ARM64 CRC32 instruction runtime detection.
+# getauxval() is supported on Linux, elf_aux_info() on FreeBSD, and
+# sysctlbyname("hw.optional.armv8_crc32", ...) is supported on Darwin
+# (macOS, iOS, etc.). Note that sysctlbyname() is supported on FreeBSD,
+# NetBSD, and possibly others too but the string is specific to Apple OSes.
+# The C code is responsible for checking defined(__APPLE__) before using
+# sysctlbyname("hw.optional.armv8_crc32", ...).
+AS_IF([test "x$enable_arm64_crc32" = xyes], [
+	AC_CHECK_FUNCS([getauxval elf_aux_info sysctlbyname])
+])
+
+
 # Check for sandbox support. If one is found, set enable_sandbox=found.
+#
+# About -fsanitize: Of our three sandbox methods, only Landlock is
+# incompatible with -fsanitize. FreeBSD 13.2 with Capsicum was tested with
+# -fsanitize=address,undefined and had no issues. OpenBSD (as of version
+# 7.4) has minimal support for process instrumentation. OpenBSD does not
+# distribute the additional libraries needed (libasan, libubsan, etc.) with
+# GCC or Clang needed for runtime sanitization support and instead only
+# support -fsanitize-minimal-runtime for minimal undefined behavior
+# sanitization. This minimal support is compatible with our use of the
+# Pledge sandbox. So only Landlock will result in a build that cannot
+# compress or decompress a single file to standard out.
 AS_CASE([$enable_sandbox],
 	[auto | capsicum], [
-		AX_CHECK_CAPSICUM([enable_sandbox=found], [:])
+		AC_CHECK_FUNCS([cap_rights_limit], [enable_sandbox=found])
 	]
 )
 AS_CASE([$enable_sandbox],
 	[auto | pledge], [
-		AC_CHECK_FUNCS([pledge], [enable_sandbox=found ; break])
+		AC_CHECK_FUNCS([pledge], [enable_sandbox=found])
+	]
+)
+AS_CASE([$enable_sandbox],
+	[auto | landlock], [
+		AC_MSG_CHECKING([if Linux Landlock is usable])
+
+		# A compile check is done here because some systems have
+		# linux/landlock.h, but do not have the syscalls defined
+		# in order to actually use Linux Landlock.
+		AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
+			#include <linux/landlock.h>
+			#include <sys/syscall.h>
+			#include <sys/prctl.h>
+
+			void my_sandbox(void)
+			{
+				(void)prctl(PR_SET_NO_NEW_PRIVS, 1, 0, 0, 0);
+				(void)SYS_landlock_create_ruleset;
+				(void)SYS_landlock_restrict_self;
+				(void)LANDLOCK_CREATE_RULESET_VERSION;
+				return;
+			}
+		]])], [
+			enable_sandbox=found
+
+			AS_CASE([$CFLAGS], [*-fsanitize=*], [AC_MSG_ERROR([
+    CFLAGS contains '-fsanitize=' which is incompatible with the Landlock
+    sandboxing. Use --disable-sandbox when using '-fsanitize'.])])
+
+			AC_DEFINE([HAVE_LINUX_LANDLOCK], [1],
+				[Define to 1 if Linux Landlock is supported.
+				See configure.ac for details.])
+			AC_MSG_RESULT([yes])
+		], [
+			AC_MSG_RESULT([no])
+		])
 	]
 )
 

debug/Makefile.am

@@ -1,9 +1,5 @@
-##
+## SPDX-License-Identifier: 0BSD
 ## Author: Lasse Collin
-##
-## This file has been put into the public domain.
-## You can do whatever you want with this file.
-##
 
 EXTRA_DIST = \
 	translation.bash

debug/crc32.c

@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: 0BSD
+
 ///////////////////////////////////////////////////////////////////////////////
 //
 /// \file       crc32.c
@@ -5,9 +7,6 @@
 //
 //  Author:     Lasse Collin
 //
-//  This file has been put into the public domain.
-//  You can do whatever you want with this file.
-//
 ///////////////////////////////////////////////////////////////////////////////
 
 #include "sysdefs.h"

debug/full_flush.c

@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: 0BSD
+
 ///////////////////////////////////////////////////////////////////////////////
 //
 /// \file       full_flush.c
@@ -5,9 +7,6 @@
 //
 //  Author:     Lasse Collin
 //
-//  This file has been put into the public domain.
-//  You can do whatever you want with this file.
-//
 ///////////////////////////////////////////////////////////////////////////////
 
 #include "sysdefs.h"

debug/hex2bin.c

@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: 0BSD
+
 ///////////////////////////////////////////////////////////////////////////////
 //
 /// \file       hex2bin.c
@@ -5,9 +7,6 @@
 //
 //  Author:     Lasse Collin
 //
-//  This file has been put into the public domain.
-//  You can do whatever you want with this file.
-//
 ///////////////////////////////////////////////////////////////////////////////
 
 #include "sysdefs.h"

debug/known_sizes.c

@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: 0BSD
+
 ///////////////////////////////////////////////////////////////////////////////
 //
 /// \file       known_sizes.c
@@ -9,9 +11,6 @@
 //
 //  Author:     Lasse Collin
 //
-//  This file has been put into the public domain.
-//  You can do whatever you want with this file.
-//
 ///////////////////////////////////////////////////////////////////////////////
 
 #include "sysdefs.h"

debug/memusage.c

@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: 0BSD
+
 ///////////////////////////////////////////////////////////////////////////////
 //
 /// \file       memusage.c
@@ -5,9 +7,6 @@
 //
 //  Author:     Lasse Collin
 //
-//  This file has been put into the public domain.
-//  You can do whatever you want with this file.
-//
 ///////////////////////////////////////////////////////////////////////////////
 
 #include "sysdefs.h"

debug/repeat.c

@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: 0BSD
+
 ///////////////////////////////////////////////////////////////////////////////
 //
 /// \file       repeat.c
@@ -9,9 +11,6 @@
 //
 //  Author:     Lasse Collin
 //
-//  This file has been put into the public domain.
-//  You can do whatever you want with this file.
-//
 ///////////////////////////////////////////////////////////////////////////////
 
 #include "sysdefs.h"

debug/sync_flush.c

@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: 0BSD
+
 ///////////////////////////////////////////////////////////////////////////////
 //
 /// \file       sync_flush.c
@@ -5,9 +7,6 @@
 //
 //  Author:     Lasse Collin
 //
-//  This file has been put into the public domain.
-//  You can do whatever you want with this file.
-//
 ///////////////////////////////////////////////////////////////////////////////
 
 #include "sysdefs.h"

debug/translation.bash

@@ -1,4 +1,5 @@
 #!/bin/bash
+# SPDX-License-Identifier: 0BSD
 
 ###############################################################################
 #
@@ -20,9 +21,6 @@
 #
 # Author: Lasse Collin
 #
-# This file has been put into the public domain.
-# You can do whatever you want with this file.
-#
 ###############################################################################
 
 set -e

doc/examples/01_compress_easy.c

@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: 0BSD
+
 ///////////////////////////////////////////////////////////////////////////////
 //
 /// \file       01_compress_easy.c
@@ -9,9 +11,6 @@
 //
 //  Author:     Lasse Collin
 //
-//  This file has been put into the public domain.
-//  You can do whatever you want with this file.
-//
 ///////////////////////////////////////////////////////////////////////////////
 
 #include <stdbool.h>

doc/examples/02_decompress.c

@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: 0BSD
+
 ///////////////////////////////////////////////////////////////////////////////
 //
 /// \file       02_decompress.c
@@ -9,9 +11,6 @@
 //
 //  Author:     Lasse Collin
 //
-//  This file has been put into the public domain.
-//  You can do whatever you want with this file.
-//
 ///////////////////////////////////////////////////////////////////////////////
 
 #include <stdbool.h>

doc/examples/03_compress_custom.c

@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: 0BSD
+
 ///////////////////////////////////////////////////////////////////////////////
 //
 /// \file       03_compress_custom.c
@@ -9,9 +11,6 @@
 //
 //  Author:     Lasse Collin
 //
-//  This file has been put into the public domain.
-//  You can do whatever you want with this file.
-//
 ///////////////////////////////////////////////////////////////////////////////
 
 #include <stdbool.h>

doc/examples/04_compress_easy_mt.c

@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: 0BSD
+
 ///////////////////////////////////////////////////////////////////////////////
 //
 /// \file       04_compress_easy_mt.c
@@ -9,9 +11,6 @@
 //
 //  Author:     Lasse Collin
 //
-//  This file has been put into the public domain.
-//  You can do whatever you want with this file.
-//
 ///////////////////////////////////////////////////////////////////////////////
 
 #include <stdbool.h>

doc/examples/11_file_info.c

@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: 0BSD
+
 ///////////////////////////////////////////////////////////////////////////////
 //
 /// \file       11_file_info.c
@@ -9,9 +11,6 @@
 //
 //  Author:     Lasse Collin
 //
-//  This file has been put into the public domain.
-//  You can do whatever you want with this file.
-//
 ///////////////////////////////////////////////////////////////////////////////
 
 #include <stdbool.h>

doc/examples/Makefile

@@ -1,9 +1,5 @@
-#
+# SPDX-License-Identifier: 0BSD
 # Author: Lasse Collin
-#
-# This file has been put into the public domain.
-# You can do whatever you want with this file.
-#
 
 CC = c99
 CFLAGS = -g

doc/examples_old/xz_pipe_comp.c

@@ -1,127 +0,0 @@
-/*
- * xz_pipe_comp.c
- * A simple example of pipe-only xz compressor implementation.
- * version: 2010-07-12 - by Daniel Mealha Cabrita
- * Not copyrighted -- provided to the public domain.
- *
- * Compiling:
- * Link with liblzma. GCC example:
- * $ gcc -llzma xz_pipe_comp.c -o xz_pipe_comp
- *
- * Usage example:
- * $ cat some_file | ./xz_pipe_comp > some_file.xz
- */
-
-#include <stdio.h>
-#include <stdint.h>
-#include <inttypes.h>
-#include <stdbool.h>
-#include <lzma.h>
-
-
-/* COMPRESSION SETTINGS */
-
-/* analogous to xz CLI options: -0 to -9 */
-#define COMPRESSION_LEVEL 6
-
-/* boolean setting, analogous to xz CLI option: -e */
-#define COMPRESSION_EXTREME true
-
-/* see: /usr/include/lzma/check.h LZMA_CHECK_* */
-#define INTEGRITY_CHECK LZMA_CHECK_CRC64
-
-
-/* read/write buffer sizes */
-#define IN_BUF_MAX	4096
-#define OUT_BUF_MAX	4096
-
-/* error codes */
-#define RET_OK			0
-#define RET_ERROR_INIT		1
-#define RET_ERROR_INPUT		2
-#define RET_ERROR_OUTPUT	3
-#define RET_ERROR_COMPRESSION	4
-
-
-/* note: in_file and out_file must be open already */
-int xz_compress (FILE *in_file, FILE *out_file)
-{
-	uint32_t preset = COMPRESSION_LEVEL | (COMPRESSION_EXTREME ? LZMA_PRESET_EXTREME : 0);
-	lzma_check check = INTEGRITY_CHECK;
-	lzma_stream strm = LZMA_STREAM_INIT; /* alloc and init lzma_stream struct */
-	uint8_t in_buf [IN_BUF_MAX];
-	uint8_t out_buf [OUT_BUF_MAX];
-	size_t in_len;	/* length of useful data in in_buf */
-	size_t out_len;	/* length of useful data in out_buf */
-	bool in_finished = false;
-	bool out_finished = false;
-	lzma_action action;
-	lzma_ret ret_xz;
-	int ret;
-
-	ret = RET_OK;
-
-	/* initialize xz encoder */
-	ret_xz = lzma_easy_encoder (&strm, preset, check);
-	if (ret_xz != LZMA_OK) {
-		fprintf (stderr, "lzma_easy_encoder error: %d\n", (int) ret_xz);
-		return RET_ERROR_INIT;
-	}
-
-	while ((! in_finished) && (! out_finished)) {
-		/* read incoming data */
-		in_len = fread (in_buf, 1, IN_BUF_MAX, in_file);
-
-		if (feof (in_file)) {
-			in_finished = true;
-		}
-		if (ferror (in_file)) {
-			in_finished = true;
-			ret = RET_ERROR_INPUT;
-		}
-
-		strm.next_in = in_buf;
-		strm.avail_in = in_len;
-
-		/* if no more data from in_buf, flushes the
-		   internal xz buffers and closes the xz data
-		   with LZMA_FINISH */
-		action = in_finished ? LZMA_FINISH : LZMA_RUN;
-
-		/* loop until there's no pending compressed output */
-		do {
-			/* out_buf is clean at this point */
-			strm.next_out = out_buf;
-			strm.avail_out = OUT_BUF_MAX;
-
-			/* compress data */
-			ret_xz = lzma_code (&strm, action);
-
-			if ((ret_xz != LZMA_OK) && (ret_xz != LZMA_STREAM_END)) {
-				fprintf (stderr, "lzma_code error: %d\n", (int) ret_xz);
-				out_finished = true;
-				ret = RET_ERROR_COMPRESSION;
-			} else {
-				/* write compressed data */
-				out_len = OUT_BUF_MAX - strm.avail_out;
-				fwrite (out_buf, 1, out_len, out_file);
-				if (ferror (out_file)) {
-					out_finished = true;
-					ret = RET_ERROR_OUTPUT;
-				}
-			}
-		} while (strm.avail_out == 0);
-	}
-
-	lzma_end (&strm);
-	return ret;
-}
-
-int main ()
-{
-	int ret;
-
-	ret = xz_compress (stdin, stdout);
-	return ret;
-}
-

doc/examples_old/xz_pipe_decomp.c

@@ -1,123 +0,0 @@
-/*
- * xz_pipe_decomp.c
- * A simple example of pipe-only xz decompressor implementation.
- * version: 2012-06-14 - by Daniel Mealha Cabrita
- * Not copyrighted -- provided to the public domain.
- *
- * Compiling:
- * Link with liblzma. GCC example:
- * $ gcc -llzma xz_pipe_decomp.c -o xz_pipe_decomp
- *
- * Usage example:
- * $ cat some_file.xz | ./xz_pipe_decomp > some_file
- */
-
-#include <stdio.h>
-#include <stdint.h>
-#include <inttypes.h>
-#include <stdbool.h>
-#include <lzma.h>
-
-
-/* read/write buffer sizes */
-#define IN_BUF_MAX	4096
-#define OUT_BUF_MAX	4096
-
-/* error codes */
-#define RET_OK			0
-#define RET_ERROR_INIT		1
-#define RET_ERROR_INPUT		2
-#define RET_ERROR_OUTPUT	3
-#define RET_ERROR_DECOMPRESSION	4
-
-
-/* note: in_file and out_file must be open already */
-int xz_decompress (FILE *in_file, FILE *out_file)
-{
-	lzma_stream strm = LZMA_STREAM_INIT; /* alloc and init lzma_stream struct */
-	const uint32_t flags = LZMA_TELL_UNSUPPORTED_CHECK | LZMA_CONCATENATED;
-	const uint64_t memory_limit = UINT64_MAX; /* no memory limit */
-	uint8_t in_buf [IN_BUF_MAX];
-	uint8_t out_buf [OUT_BUF_MAX];
-	size_t in_len;	/* length of useful data in in_buf */
-	size_t out_len;	/* length of useful data in out_buf */
-	bool in_finished = false;
-	bool out_finished = false;
-	lzma_action action;
-	lzma_ret ret_xz;
-	int ret;
-
-	ret = RET_OK;
-
-	/* initialize xz decoder */
-	ret_xz = lzma_stream_decoder (&strm, memory_limit, flags);
-	if (ret_xz != LZMA_OK) {
-		fprintf (stderr, "lzma_stream_decoder error: %d\n", (int) ret_xz);
-		return RET_ERROR_INIT;
-	}
-
-	while ((! in_finished) && (! out_finished)) {
-		/* read incoming data */
-		in_len = fread (in_buf, 1, IN_BUF_MAX, in_file);
-
-		if (feof (in_file)) {
-			in_finished = true;
-		}
-		if (ferror (in_file)) {
-			in_finished = true;
-			ret = RET_ERROR_INPUT;
-		}
-
-		strm.next_in = in_buf;
-		strm.avail_in = in_len;
-
-		/* if no more data from in_buf, flushes the
-		   internal xz buffers and closes the decompressed data
-		   with LZMA_FINISH */
-		action = in_finished ? LZMA_FINISH : LZMA_RUN;
-
-		/* loop until there's no pending decompressed output */
-		do {
-			/* out_buf is clean at this point */
-			strm.next_out = out_buf;
-			strm.avail_out = OUT_BUF_MAX;
-
-			/* decompress data */
-			ret_xz = lzma_code (&strm, action);
-
-			if ((ret_xz != LZMA_OK) && (ret_xz != LZMA_STREAM_END)) {
-				fprintf (stderr, "lzma_code error: %d\n", (int) ret_xz);
-				out_finished = true;
-				ret = RET_ERROR_DECOMPRESSION;
-			} else {
-				/* write decompressed data */
-				out_len = OUT_BUF_MAX - strm.avail_out;
-				fwrite (out_buf, 1, out_len, out_file);
-				if (ferror (out_file)) {
-					out_finished = true;
-					ret = RET_ERROR_OUTPUT;
-				}
-			}
-		} while (strm.avail_out == 0);
-	}
-
-	/* Bug fix (2012-06-14): If no errors were detected, check
-	   that the last lzma_code() call returned LZMA_STREAM_END.
-	   If not, the file is probably truncated. */
-	if ((ret == RET_OK) && (ret_xz != LZMA_STREAM_END)) {
-		fprintf (stderr, "Input truncated or corrupt\n");
-		ret = RET_ERROR_DECOMPRESSION;
-	}
-
-	lzma_end (&strm);
-	return ret;
-}
-
-int main ()
-{
-	int ret;
-
-	ret = xz_decompress (stdin, stdout);
-	return ret;
-}
-

doc/faq.txt

@@ -240,5 +240,5 @@ A:  Give --enable-small to the configure script. Use also appropriate
     If the result is still too big, take a look at XZ Embedded. It is
     a separate project, which provides a limited but significantly
     smaller XZ decoder implementation than XZ Utils. You can find it
-    at <https://tukaani.org/xz/embedded.html>.
+    at <https://xz.tukaani.org/xz-embedded/>.
 

doc/lzma-file-format.txt

@@ -40,11 +40,11 @@ The .lzma File Format
 
 0.2. Changes
 
-        Last modified: 2022-07-13 21:00+0300
+        Last modified: 2024-01-16 18:00+0800
 
-        Compared to the previous version (2011-04-12 11:55+0300)
-        the section 1.1.3 was modified to allow End of Payload Marker
-        with a known Uncompressed Size.
+        Compared to the previous version (2022-07-13 21:00+0300)
+        the section 2 was modified to change links from http to
+        https and to update XZ links.
 
 
 1. File Format
@@ -157,17 +157,17 @@ The .lzma File Format
 2. References
 
         LZMA SDK - The original LZMA implementation
-        http://7-zip.org/sdk.html
+        https://7-zip.org/sdk.html
 
         7-Zip
-        http://7-zip.org/
+        https://7-zip.org/
 
         LZMA Utils - LZMA adapted to POSIX-like systems
-        http://tukaani.org/lzma/
+        https://tukaani.org/lzma/
 
         XZ Utils - The next generation of LZMA Utils
-        http://tukaani.org/xz/
+        https://xz.tukaani.org/xz-utils/
 
         The .xz file format - The successor of the .lzma format
-        http://tukaani.org/xz/xz-file-format.txt
+        https://xz.tukaani.org/format/xz-file-format.txt
 

doc/xz-file-format.txt

@@ -2,7 +2,7 @@
 The .xz File Format
 ===================
 
-Version 1.1.0 (2022-12-11)
+Version 1.2.0 (2024-01-19)
 
 
         0. Preface
@@ -81,18 +81,22 @@ Version 1.1.0 (2022-12-11)
 0.2. Getting the Latest Version
 
         The latest official version of this document can be downloaded
-        from <http://tukaani.org/xz/xz-file-format.txt>.
+        from <https://xz.tukaani.org/format/xz-file-format.txt>.
 
         Specific versions of this document have a filename
         xz-file-format-X.Y.Z.txt where X.Y.Z is the version number.
         For example, the version 1.0.0 of this document is available
-        at <http://tukaani.org/xz/xz-file-format-1.0.0.txt>.
+        at <https://xz.tukaani.org/format/xz-file-format-1.0.0.txt>.
 
 
 0.3. Version History
 
         Version   Date          Description
 
+        1.2.0     2024-01-19    Added RISC-V filter and updated URLs in
+                                Sections 0.2 and 7. The URL of this
+                                specification was changed.
+
         1.1.0     2022-12-11    Added ARM64 filter and clarified 32-bit
                                 ARM endianness in Section 5.3.2,
                                 language improvements in Section 5.4
@@ -923,6 +927,7 @@ Version 1.1.0 (2022-12-11)
               0x08       2 bytes    ARM Thumb filter [1]
               0x09       4 bytes    SPARC filter
               0x0A       4 bytes    ARM64 filter [2]
+              0x0B       2 bytes    RISC-V filter
 
               [1] These are for little endian instruction encoding.
                   This must not be confused with data endianness.
@@ -1136,30 +1141,30 @@ Version 1.1.0 (2022-12-11)
 7. References
 
         LZMA SDK - The original LZMA implementation
-        http://7-zip.org/sdk.html
+        https://7-zip.org/sdk.html
 
         LZMA Utils - LZMA adapted to POSIX-like systems
-        http://tukaani.org/lzma/
+        https://tukaani.org/lzma/
 
         XZ Utils - The next generation of LZMA Utils
-        http://tukaani.org/xz/
+        https://xz.tukaani.org/xz-utils/
 
         [RFC-1952]
         GZIP file format specification version 4.3
-        http://www.ietf.org/rfc/rfc1952.txt
+        https://www.ietf.org/rfc/rfc1952.txt
           - Notation of byte boxes in section "2.1. Overall conventions"
 
         [RFC-2119]
         Key words for use in RFCs to Indicate Requirement Levels
-        http://www.ietf.org/rfc/rfc2119.txt
+        https://www.ietf.org/rfc/rfc2119.txt
 
         [GNU-tar]
-        GNU tar 1.21 manual
-        http://www.gnu.org/software/tar/manual/html_node/Blocking-Factor.html
+        GNU tar 1.35 manual
+        https://www.gnu.org/software/tar/manual/html_node/Blocking-Factor.html
           - Node 9.4.2 "Blocking Factor", paragraph that begins
             "gzip will complain about trailing garbage"
           - Note that this URL points to the latest version of the
             manual, and may some day not contain the note which is in
-            1.21. For the exact version of the manual, download GNU
-            tar 1.21: ftp://ftp.gnu.org/pub/gnu/tar/tar-1.21.tar.gz
+            1.35. For the exact version of the manual, download GNU
+            tar 1.35: ftp://ftp.gnu.org/pub/gnu/tar/tar-1.35.tar.gz
 

dos/Makefile

@@ -1,12 +1,11 @@
+# SPDX-License-Identifier: 0BSD
+
 ###############################################################################
 #
 # Makefile to build XZ Utils using DJGPP
 #
 # Author: Lasse Collin
 #
-# This file has been put into the public domain.
-# You can do whatever you want with this file.
-#
 ###############################################################################
 
 # For debugging, set comment "#define NDEBUG 1" from config.h to enable

dos/config.h

@@ -1,3 +1,5 @@
+/* SPDX-License-Identifier: 0BSD */
+
 /* How many MiB of RAM to assume if the real amount cannot be determined. */
 #define ASSUME_RAM 32
 
@@ -143,7 +145,7 @@
 #define PACKAGE_NAME "XZ Utils"
 
 /* Define to the home page for this package. */
-#define PACKAGE_URL "https://tukaani.org/xz/"
+#define PACKAGE_URL "https://xz.tukaani.org/xz-utils/"
 
 /* The size of 'size_t', as computed by sizeof. */
 #define SIZEOF_SIZE_T 4

doxygen/Doxyfile

@@ -61,7 +61,7 @@ PROJECT_BRIEF          =
 # pixels and the maximum width should not exceed 200 pixels. Doxygen will copy
 # the logo to the output directory.
 
-PROJECT_LOGO           =
+PROJECT_LOGO           = ../doc/xz-logo.png
 
 # The OUTPUT_DIRECTORY tag is used to specify the (relative or absolute) path
 # into which the generated documentation will be written. If a relative path is
@@ -1246,7 +1246,7 @@ HTML_HEADER            =
 # that doxygen normally uses.
 # This tag requires that the tag GENERATE_HTML is set to YES.
 
-HTML_FOOTER            =
+HTML_FOOTER            = footer.html
 
 # The HTML_STYLESHEET tag can be used to specify a user-defined cascading style
 # sheet that is used by each HTML page. It can be used to fine-tune the look of
@@ -1286,7 +1286,7 @@ HTML_EXTRA_STYLESHEET  =
 # files will be copied as-is; there are no commands or markers available.
 # This tag requires that the tag GENERATE_HTML is set to YES.
 
-HTML_EXTRA_FILES       =
+HTML_EXTRA_FILES       = ../COPYING.CC-BY-SA-4.0
 
 # The HTML_COLORSTYLE tag can be used to specify if the generated HTML output
 # should be rendered with a dark or light theme.

doxygen/footer.html

@@ -0,0 +1,13 @@
+<hr class="footer"/>
+
+<p style="text-align: right;padding-right: 12px;">
+	XZ logo &copy; 2023 by Jia Tan is licensed under
+	<a href="COPYING.CC-BY-SA-4.0"
+	   rel="license"
+	   style="display:inline-block;">
+		CC BY-SA 4.0
+	</a>
+</p>
+
+</body>
+</html>

doxygen/update-doxygen

@@ -1,5 +1,6 @@
 #!/bin/sh
-#
+# SPDX-License-Identifier: 0BSD
+
 #############################################################################
 #
 # Updates the Doxygen generated documentation files in the source tree.
@@ -16,9 +17,6 @@
 # Authors: Jia Tan
 #          Lasse Collin
 #
-# This file has been put into the public domain.
-# You can do whatever you want with this file.
-#
 #############################################################################
 
 set -e

extra/7z2lzma/7z2lzma.bash

@@ -1,5 +1,6 @@
 #!/bin/bash
-#
+# SPDX-License-Identifier: 0BSD
+
 #############################################################################
 #
 # 7z2lzma.bash is very primitive .7z to .lzma converter. The input file must
@@ -17,9 +18,6 @@
 #
 # Author: Lasse Collin <lasse.collin@tukaani.org>
 #
-# This file has been put into the public domain.
-# You can do whatever you want with this file.
-#
 #############################################################################
 
 # You can use 7z or 7za, both will work.

extra/scanlzma/scanlzma.c

@@ -1,3 +1,5 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
 /*
     scanlzma, scan for lzma compressed data in stdin and echo it to stdout.
     Copyright (C) 2006 Timo Lindfors

lib/Makefile.am

@@ -1,3 +1,5 @@
+## SPDX-License-Identifier: GPL-2.0-or-later
+
 ##
 ## Copyright (C) 2004-2007 Free Software Foundation, Inc.
 ##

lib/getopt-cdefs.h

@@ -1,3 +1,5 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
 /* getopt-on-non-glibc compatibility macros.
    Copyright (C) 1989-2023 Free Software Foundation, Inc.
    This file is part of gnulib.

lib/getopt-core.h

@@ -1,3 +1,5 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
 /* Declarations for getopt (basic, portable features only).
    Copyright (C) 1989-2023 Free Software Foundation, Inc.
    This file is part of the GNU C Library and is also part of gnulib.

lib/getopt-ext.h

@@ -1,3 +1,5 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
 /* Declarations for getopt (GNU extensions).
    Copyright (C) 1989-2023 Free Software Foundation, Inc.
    This file is part of the GNU C Library and is also part of gnulib.

lib/getopt-pfx-core.h

@@ -1,3 +1,5 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
 /* getopt (basic, portable features) gnulib wrapper header.
    Copyright (C) 1989-2023 Free Software Foundation, Inc.
    This file is part of gnulib.

lib/getopt-pfx-ext.h

@@ -1,3 +1,5 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
 /* getopt (GNU extensions) gnulib wrapper header.
    Copyright (C) 1989-2023 Free Software Foundation, Inc.
    This file is part of gnulib.

lib/getopt.c

@@ -1,3 +1,5 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
 /* Getopt for GNU.
    Copyright (C) 1987-2023 Free Software Foundation, Inc.
    This file is part of the GNU C Library and is also part of gnulib.

lib/getopt.in.h

@@ -1,3 +1,5 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
 /* Declarations for getopt.
    Copyright (C) 1989-2023 Free Software Foundation, Inc.
    This file is part of gnulib.

lib/getopt1.c

@@ -1,3 +1,5 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
 /* getopt_long and getopt_long_only entry points for GNU getopt.
    Copyright (C) 1987-2023 Free Software Foundation, Inc.
    This file is part of the GNU C Library and is also part of gnulib.

lib/getopt_int.h

@@ -1,3 +1,5 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
 /* Internal declarations for getopt.
    Copyright (C) 1989-2023 Free Software Foundation, Inc.
    This file is part of the GNU C Library and is also part of gnulib.

m4/.gitignore

@@ -1,3 +1,4 @@
+build-to-host.m4
 codeset.m4
 extern-inline.m4
 fcntl-o.m4

m4/ax_check_capsicum.m4

@@ -1,85 +0,0 @@
-# -*- Autoconf -*-
-
-# SYNOPSIS
-#
-#   AX_CHECK_CAPSICUM([ACTION-IF-FOUND[, ACTION-IF-NOT-FOUND]])
-#
-# DESCRIPTION
-#
-#   This macro searches for an installed Capsicum header and library,
-#   and if found:
-#     - AC_DEFINE([HAVE_CAPSICUM]) is called.
-#     - AC_DEFINE([HAVE_SYS_CAPSICUM_H]) is called if <sys/capsicum.h>
-#       is present (otherwise <sys/capability.h> must be used).
-#     - CAPSICUM_LIB is set to the -l option needed to link Capsicum support,
-#       and AC_SUBST([CAPSICUM_LIB]) is called.
-#     - The shell commands in ACTION-IF-FOUND are run. The default
-#       ACTION-IF-FOUND prepends ${CAPSICUM_LIB} into LIBS. If you don't
-#       want to modify LIBS and don't need to run any other commands either,
-#       use a colon as ACTION-IF-FOUND.
-#
-#   If Capsicum support isn't found:
-#     - The shell commands in ACTION-IF-NOT-FOUND are run. The default
-#       ACTION-IF-NOT-FOUND calls AC_MSG_WARN to print a warning that
-#       Capsicum support wasn't found.
-#
-#   You should use autoheader to include a definition for the symbols above
-#   in a config.h file.
-#
-#   Sample usage in a C/C++ source is as follows:
-#
-#     #ifdef HAVE_CAPSICUM
-#     # ifdef HAVE_SYS_CAPSICUM_H
-#     #  include <sys/capsicum.h>
-#     # else
-#     #  include <sys/capability.h>
-#     # endif
-#     #endif /* HAVE_CAPSICUM */
-#
-# LICENSE
-#
-#   Copyright (c) 2014 Google Inc.
-#   Copyright (c) 2015 Lasse Collin <lasse.collin@tukaani.org>
-#
-#   Copying and distribution of this file, with or without modification,
-#   are permitted in any medium without royalty provided the copyright
-#   notice and this notice are preserved.  This file is offered as-is,
-#   without any warranty.
-
-#serial 2
-
-AC_DEFUN([AX_CHECK_CAPSICUM], [
-# On FreeBSD >= 11.x and Linux, Capsicum is uses <sys/capsicum.h>.
-# If this header is found, it is assumed to be the right one.
-capsicum_header_found=no
-AC_CHECK_HEADERS([sys/capsicum.h], [capsicum_header_found=yes])
-if test "$capsicum_header_found" = no ; then
-    # On FreeBSD 10.x Capsicum uses <sys/capability.h>. Such a header exists
-    # on Linux too but it describes POSIX.1e capabilities. Look for the
-    # declaration of cap_rights_limit to check if <sys/capability.h> is
-    # a Capsicum header.
-    AC_CHECK_DECL([cap_rights_limit], [capsicum_header_found=yes], [],
-                  [#include <sys/capability.h>])
-fi
-
-capsicum_lib_found=no
-CAPSICUM_LIB=
-if test "$capsicum_header_found" = yes ; then
-    AC_LANG_PUSH([C])
-    # FreeBSD >= 10.x has Capsicum functions in libc.
-    AC_LINK_IFELSE([AC_LANG_CALL([], [cap_rights_limit])],
-                   [capsicum_lib_found=yes], [])
-    # Linux has Capsicum functions in libcaprights.
-    AC_CHECK_LIB([caprights], [cap_rights_limit],
-                 [CAPSICUM_LIB=-lcaprights
-                  capsicum_lib_found=yes], [])
-    AC_LANG_POP([C])
-fi
-AC_SUBST([CAPSICUM_LIB])
-
-if test "$capsicum_lib_found" = yes ; then
-    AC_DEFINE([HAVE_CAPSICUM], [1], [Define to 1 if Capsicum is available.])
-    m4_default([$1], [LIBS="${CAPSICUM_LIB} $LIBS"])
-else
-    m4_default([$2], [AC_MSG_WARN([Capsicum support not found])])
-fi])

m4/ax_pthread.m4

@@ -1,3 +1,5 @@
+dnl SPDX-License-Identifier: GPL-3.0-or-later WITH Autoconf-exception-macro
+
 # ===========================================================================
 #        https://www.gnu.org/software/autoconf-archive/ax_pthread.html
 # ===========================================================================

m4/getopt.m4

@@ -1,3 +1,5 @@
+dnl SPDX-License-Identifier: FSFULLR
+
 # getopt.m4 serial 49 (modified version)
 dnl Copyright (C) 2002-2006, 2008-2023 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation

m4/posix-shell.m4

@@ -1,3 +1,5 @@
+dnl SPDX-License-Identifier: FSFULLR
+
 # Find a POSIX-conforming shell.
 
 # Copyright (C) 2007-2008 Free Software Foundation, Inc.

m4/tuklib_common.m4

@@ -1,3 +1,6 @@
+# SPDX-License-Identifier: 0BSD
+
+#############################################################################
 #
 # SYNOPSIS
 #
@@ -7,13 +10,11 @@
 #
 #   Common checks for tuklib.
 #
-# COPYING
+#############################################################################
 #
 # Author: Lasse Collin
 #
-#   This file has been put into the public domain.
-#   You can do whatever you want with this file.
-#
+#############################################################################
 
 AC_DEFUN_ONCE([TUKLIB_COMMON], [
 AC_REQUIRE([AC_CANONICAL_HOST])

m4/tuklib_cpucores.m4

@@ -1,3 +1,6 @@
+# SPDX-License-Identifier: 0BSD
+
+#############################################################################
 #
 # SYNOPSIS
 #
@@ -17,13 +20,11 @@
 #       GetSystemInfo() is used on Cygwin)
 #     - pstat_getdynamic(): HP-UX
 #
-# COPYING
+#############################################################################
 #
 # Author: Lasse Collin
 #
-#   This file has been put into the public domain.
-#   You can do whatever you want with this file.
-#
+#############################################################################
 
 AC_DEFUN_ONCE([TUKLIB_CPUCORES], [
 AC_REQUIRE([TUKLIB_COMMON])

m4/tuklib_integer.m4

@@ -1,3 +1,6 @@
+# SPDX-License-Identifier: 0BSD
+
+#############################################################################
 #
 # SYNOPSIS
 #
@@ -11,13 +14,11 @@
 #     - Does the hardware support fast unaligned access to 16-bit, 32-bit,
 #       and 64-bit integers
 #
-# COPYING
+#############################################################################
 #
 # Author: Lasse Collin
 #
-#   This file has been put into the public domain.
-#   You can do whatever you want with this file.
-#
+#############################################################################
 
 AC_DEFUN_ONCE([TUKLIB_INTEGER], [
 AC_REQUIRE([TUKLIB_COMMON])
@@ -65,22 +66,42 @@ AC_MSG_CHECKING([if unaligned memory access should be used])
 AC_ARG_ENABLE([unaligned-access], AS_HELP_STRING([--enable-unaligned-access],
 		[Enable if the system supports *fast* unaligned memory access
 		with 16-bit, 32-bit, and 64-bit integers. By default,
-		this is enabled only on x86, x86_64, big endian PowerPC,
-		and some ARM systems.]),
+		this is enabled on x86, x86-64,
+		32/64-bit big endian PowerPC,
+		64-bit little endian PowerPC,
+		and some ARM, ARM64, and RISC-V systems.]),
 	[], [enable_unaligned_access=auto])
 if test "x$enable_unaligned_access" = xauto ; then
-	# TODO: There may be other architectures, on which unaligned access
-	# is OK.
+	# NOTE: There might be other architectures on which unaligned access
+	# is fast.
 	case $host_cpu in
-		i?86|x86_64|powerpc|powerpc64)
+		i?86|x86_64|powerpc|powerpc64|powerpc64le)
 			enable_unaligned_access=yes
 			;;
-		arm*|aarch64*)
+		arm*|aarch64*|riscv*)
 			# On 32-bit and 64-bit ARM, GCC and Clang
 			# #define __ARM_FEATURE_UNALIGNED if
 			# unaligned access is supported.
+			#
+			# Exception: GCC at least up to 13.2.0
+			# defines it even when using -mstrict-align
+			# so in that case this autodetection goes wrong.
+			# Most of the time -mstrict-align isn't used so it
+			# shouldn't be a common problem in practice. See:
+			# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111555
+			#
+			# RISC-V C API Specification says that if
+			# __riscv_misaligned_fast is defined then
+			# unaligned access is known to be fast.
+			#
+			# MSVC is handled as a special case: We assume that
+			# 32/64-bit ARM supports fast unaligned access.
+			# If MSVC gets RISC-V support then this will assume
+			# fast unaligned access on RISC-V too.
 			AC_COMPILE_IFELSE([AC_LANG_SOURCE([
-#ifndef __ARM_FEATURE_UNALIGNED
+#if !defined(__ARM_FEATURE_UNALIGNED) \
+		&& !defined(__riscv_misaligned_fast) \
+		&& !defined(_MSC_VER)
 compile error
 #endif
 int main(void) { return 0; }

m4/tuklib_mbstr.m4

@@ -1,3 +1,6 @@
+# SPDX-License-Identifier: 0BSD
+
+#############################################################################
 #
 # SYNOPSIS
 #
@@ -15,13 +18,11 @@
 #   functions, but each function is put into a separate .c file so
 #   that it is possible to pick only what is strictly needed.
 #
-# COPYING
+#############################################################################
 #
 # Author: Lasse Collin
 #
-#   This file has been put into the public domain.
-#   You can do whatever you want with this file.
-#
+#############################################################################
 
 AC_DEFUN_ONCE([TUKLIB_MBSTR], [
 AC_REQUIRE([TUKLIB_COMMON])

m4/tuklib_physmem.m4

@@ -1,3 +1,6 @@
+# SPDX-License-Identifier: 0BSD
+
+#############################################################################
 #
 # SYNOPSIS
 #
@@ -29,13 +32,11 @@
 #     - sysinfo() works on Linux/dietlibc and probably on other Linux
 #       systems whose libc may lack sysconf().
 #
-# COPYING
+#############################################################################
 #
 # Author: Lasse Collin
 #
-#   This file has been put into the public domain.
-#   You can do whatever you want with this file.
-#
+#############################################################################
 
 AC_DEFUN_ONCE([TUKLIB_PHYSMEM], [
 AC_REQUIRE([TUKLIB_COMMON])

m4/tuklib_progname.m4

@@ -1,3 +1,6 @@
+# SPDX-License-Identifier: 0BSD
+
+#############################################################################
 #
 # SYNOPSIS
 #
@@ -11,13 +14,11 @@
 #   This .m4 file is needed allow this module to use glibc's
 #   program_invocation_name.
 #
-# COPYING
+#############################################################################
 #
 # Author: Lasse Collin
 #
-#   This file has been put into the public domain.
-#   You can do whatever you want with this file.
-#
+#############################################################################
 
 AC_DEFUN_ONCE([TUKLIB_PROGNAME], [
 AC_REQUIRE([TUKLIB_COMMON])

m4/visibility.m4

@@ -1,3 +1,5 @@
+dnl SPDX-License-Identifier: FSFULLR
+
 # visibility.m4 serial 8
 dnl Copyright (C) 2005, 2008, 2010-2023 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation

macosx/build.sh

@@ -1,113 +0,0 @@
-#!/bin/sh
-
-###############################################################################
-# Author: Anders F Björklund <afb@users.sourceforge.net>
-#
-# This file has been put into the public domain.
-# You can do whatever you want with this file.
-###############################################################################
-
-mkdir -p Root
-mkdir -p Resources
-
-# Abort immediately if something goes wrong.
-set -e
-
-GCC="gcc-4.2"
-SDK="/Developer/SDKs/MacOSX10.5.sdk"
-MDT="10.5"
-GTT=i686-apple-darwin9
-
-ARCHES1="-arch ppc -arch ppc64 -arch i386 -arch x86_64"
-ARCHES2="-arch ppc -arch i386"
-PKGFORMAT="10.5" # xar
-
-# avoid "unknown required load command: 0x80000022" from linking on Snow Leopard
-uname -r | grep ^1 >/dev/null && LDFLAGS="$LDFLAGS -Wl,-no_compact_linkedit"
-
-# Clean up if it was already configured.
-[ -f Makefile ] && make distclean
-
-# Build the regular fat program
-
-CC="$GCC" \
-CFLAGS="-O2 -g $ARCHES1 -isysroot $SDK -mmacosx-version-min=$MDT" \
-../configure --disable-dependency-tracking --disable-xzdec --disable-lzmadec $GTT
-
-make
-
-make check
-
-make DESTDIR=`pwd`/Root install
-
-make distclean
-
-# Build the size-optimized program
-
-CC="$GCC" \
-CFLAGS="-Os -g $ARCHES2 -isysroot $SDK -mmacosx-version-min=$MDT" \
-../configure --disable-dependency-tracking --disable-shared --disable-nls --disable-encoders --enable-small --disable-threads $GTT
-
-make -C src/liblzma
-make -C src/xzdec
-make -C src/xzdec DESTDIR=`pwd`/Root install
-
-cp -a ../extra Root/usr/local/share/doc/xz
-
-make distclean
-
-# Move development files to different package
-
-test -d liblzma && rm -r liblzma
-mkdir -p liblzma/usr/local
-
-mv Root/usr/local/include liblzma/usr/local
-mv Root/usr/local/lib liblzma/usr/local
-
-mkdir -p Root/usr/local/lib
-cp -p liblzma/usr/local/lib/liblzma.5.dylib Root/usr/local/lib
-mkdir -p liblzma/usr/local/share/doc/xz
-mv Root/usr/local/share/doc/xz/examples* liblzma/usr/local/share/doc/xz
-
-# Strip debugging symbols and make relocatable
-
-for bin in xz lzmainfo xzdec lzmadec; do
-    strip -S Root/usr/local/bin/$bin
-    install_name_tool -change /usr/local/lib/liblzma.5.dylib @executable_path/../lib/liblzma.5.dylib Root/usr/local/bin/$bin
-done
-
-for lib in liblzma.5.dylib; do
-    strip -S Root/usr/local/lib/$lib
-    install_name_tool -id @executable_path/../lib/liblzma.5.dylib Root/usr/local/lib/$lib
-done
-
-# Create tarball, but without the HFS+ attrib
-
-rmdir debug lib po src/liblzma/api src/liblzma src/lzmainfo src/scripts src/xz src/xzdec src tests
-
-( cd Root/usr/local; COPY_EXTENDED_ATTRIBUTES_DISABLE=true COPYFILE_DISABLE=true tar cvjf ../../../XZ.tbz * )
-( cd liblzma; COPY_EXTENDED_ATTRIBUTES_DISABLE=true COPYFILE_DISABLE=true tar cvjf ../liblzma.tbz ./usr/local )
-
-# Include documentation files for package
-
-cp -p ../README Resources/ReadMe.txt
-cp -p ../COPYING Resources/License.txt
-
-# Make an Installer.app package
-
-ID="org.tukaani.xz"
-VERSION=`cd ..; sh build-aux/version.sh`
-PACKAGEMAKER=/Developer/Applications/Utilities/PackageMaker.app/Contents/MacOS/PackageMaker
-$PACKAGEMAKER -r Root/usr/local -l /usr/local -e Resources -i $ID -n $VERSION -t XZ -o XZ.pkg -g $PKGFORMAT --verbose
-$PACKAGEMAKER -r liblzma -w -k -i $ID.liblzma -n $VERSION -o liblzma.pkg -g $PKGFORMAT --verbose
-
-# Put the package in a disk image
-
-if [ "$PKGFORMAT" != "10.5" ]; then
-hdiutil create -fs HFS+ -format UDZO -quiet -srcfolder XZ.pkg -ov XZ.dmg
-hdiutil internet-enable -yes -quiet XZ.dmg
-fi
-
-echo
-echo "Build completed successfully."
-echo

po/Makevars

@@ -1,4 +1,10 @@
+# SPDX-License-Identifier: FSFUL
+
 # Makefile variables for PO directory in any package using GNU gettext.
+#
+# Copyright (C) 2003-2019 Free Software Foundation, Inc.
+# This file is free software; the Free Software Foundation gives
+# unlimited permission to use, copy, distribute, and modify it.
 
 # Usually the message domain is the same as the package name.
 DOMAIN = $(PACKAGE)
@@ -8,7 +14,7 @@ subdir = po
 top_builddir = ..
 
 # These options get passed to xgettext.
-XGETTEXT_OPTIONS = --keyword=_ --keyword=N_
+XGETTEXT_OPTIONS = --keyword=_ --keyword=N_ --no-wrap --package-name='XZ Utils'
 
 # This is the copyright holder that gets inserted into the header of the
 # $(DOMAIN).pot file.  Set this to the copyright holder of the surrounding
@@ -18,7 +24,14 @@ XGETTEXT_OPTIONS = --keyword=_ --keyword=N_
 # or entity, or to disclaim their copyright.  The empty string stands for
 # the public domain; in this case the translators are expected to disclaim
 # their copyright.
-COPYRIGHT_HOLDER =
+COPYRIGHT_HOLDER = The XZ Utils authors and contributors
+
+# This tells whether or not to prepend "GNU " prefix to the package
+# name that gets inserted into the header of the $(DOMAIN).pot file.
+# Possible values are "yes", "no", or empty.  If it is empty, try to
+# detect it automatically by scanning the files in $(top_srcdir) for
+# "GNU packagename" string.
+PACKAGE_GNU = no
 
 # This is the email address or URL to which the translators shall report
 # bugs in the untranslated strings:
@@ -40,7 +53,35 @@ MSGID_BUGS_ADDRESS =
 # message catalogs shall be used.  It is usually empty.
 EXTRA_LOCALE_CATEGORIES =
 
-# Although you may need slightly wider terminal than 80 chars, it is
-# much nicer to edit the output of --help when this is set.
-XGETTEXT_OPTIONS += --no-wrap
-MSGMERGE += --no-wrap
+# This tells whether the $(DOMAIN).pot file contains messages with an 'msgctxt'
+# context.  Possible values are "yes" and "no".  Set this to yes if the
+# package uses functions taking also a message context, like pgettext(), or
+# if in $(XGETTEXT_OPTIONS) you define keywords with a context argument.
+USE_MSGCTXT = no
+
+# These options get passed to msgmerge.
+# Useful options are in particular:
+#   --previous            to keep previous msgids of translated messages,
+#   --quiet               to reduce the verbosity.
+MSGMERGE_OPTIONS = --no-wrap
+
+# These options get passed to msginit.
+# If you want to disable line wrapping when writing PO files, add
+# --no-wrap to MSGMERGE_OPTIONS, XGETTEXT_OPTIONS, and
+# MSGINIT_OPTIONS.
+#
+# Although one may need slightly wider terminal than 80 chars, it is
+# much nicer to edit the output of --help when --no-wrap is set.
+MSGINIT_OPTIONS = --no-wrap
+
+# This tells whether or not to regenerate a PO file when $(DOMAIN).pot
+# has changed.  Possible values are "yes" and "no".  Set this to no if
+# the POT file is checked in the repository and the version control
+# program ignores timestamps.
+PO_DEPENDS_ON_POT = yes
+
+# This tells whether or not to forcibly update $(DOMAIN).pot and
+# regenerate PO files on "make dist".  Possible values are "yes" and
+# "no".  Set this to no if the POT file and PO files are maintained
+# externally.
+DIST_DEPENDS_ON_UPDATE_PO = yes

po/POTFILES.in

@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: 0BSD
+
 # List of source files which contain translatable strings.
 src/xz/args.c
 src/xz/coder.c
@@ -6,8 +8,10 @@ src/xz/hardware.c
 src/xz/list.c
 src/xz/main.c
 src/xz/message.c
+src/xz/mytime.c
 src/xz/options.c
 src/xz/signals.c
 src/xz/suffix.c
 src/xz/util.c
+src/lzmainfo/lzmainfo.c
 src/common/tuklib_exit.c

po/xz.pot-header

@@ -0,0 +1,7 @@
+# SPDX-License-Identifier: 0BSD
+#
+# SOME DESCRIPTIVE TITLE.
+# Copyright (C) The XZ Utils authors and contributors
+# This file is published under the BSD Zero Clause License.
+# FIRST AUTHOR <EMAIL@ADDRESS>, YEAR.
+#

po/zh_CN.po

@@ -1,14 +1,14 @@
 # Chinese translations for xz package
 # xz 软件包的简体中文翻译。
 # This file is put in the public domain.
-# Boyuan Yang <073plan@gmail.com>, 2019, 2022, 2023.
+# Boyuan Yang <073plan@gmail.com>, 2019, 2022, 2023, 2024.
 #
 msgid ""
 msgstr ""
-"Project-Id-Version: xz 5.4.4-pre1\n"
+"Project-Id-Version: xz 5.6.0-pre1\n"
 "Report-Msgid-Bugs-To: xz@tukaani.org\n"
-"POT-Creation-Date: 2023-07-18 23:34+0800\n"
-"PO-Revision-Date: 2023-07-19 14:24-0400\n"
+"POT-Creation-Date: 2024-01-26 19:40+0800\n"
+"PO-Revision-Date: 2024-02-05 15:15-0500\n"
 "Last-Translator: Boyuan Yang <073plan@gmail.com>\n"
 "Language-Team: Chinese (simplified) <i18n-zh@googlegroups.com>\n"
 "Language: zh_CN\n"
@@ -17,144 +17,181 @@ msgstr ""
 "Content-Transfer-Encoding: 8bit\n"
 "Plural-Forms: nplurals=1; plural=0;\n"
 "X-Bugs: Report translation errors to the Language-Team address.\n"
-"X-Generator: Poedit 3.2.2\n"
+"X-Generator: Poedit 3.4.2\n"
 
-#: src/xz/args.c:77
+#: src/xz/args.c:78
 #, c-format
 msgid "%s: Invalid argument to --block-list"
 msgstr "%s：--block-list 的无效参数"
 
-#: src/xz/args.c:87
+#: src/xz/args.c:88
 #, c-format
 msgid "%s: Too many arguments to --block-list"
 msgstr "%s：--block-list 得到过多参数"
 
-#: src/xz/args.c:116
+#: src/xz/args.c:125
+#, c-format
+msgid "In --block-list, block size is missing after filter chain number '%c:'"
+msgstr "在 --block-list 中，块大小在过滤器链编号 '%c:' 之后缺失"
+
+#: src/xz/args.c:151
 msgid "0 can only be used as the last element in --block-list"
 msgstr "0 仅可用于 --block-list 的最后一个元素"
 
-#: src/xz/args.c:451
+#: src/xz/args.c:540
 #, c-format
 msgid "%s: Unknown file format type"
 msgstr "%s：未知文件格式类型"
 
-#: src/xz/args.c:474 src/xz/args.c:482
+#: src/xz/args.c:563 src/xz/args.c:571
 #, c-format
 msgid "%s: Unsupported integrity check type"
 msgstr "%s：不支持的完整性检查类型"
 
-#: src/xz/args.c:518
-msgid "Only one file can be specified with `--files' or `--files0'."
-msgstr "仅可使用“--files”或“--files0”指定一个文件。"
+#: src/xz/args.c:607
+msgid "Only one file can be specified with '--files' or '--files0'."
+msgstr "仅可使用 '--files' 或 '--files0' 指定单个文件。"
 
 #. TRANSLATORS: This is a translatable
 #. string because French needs a space
 #. before the colon ("%s : %s").
-#: src/xz/args.c:533 src/xz/coder.c:691 src/xz/coder.c:707 src/xz/coder.c:967
-#: src/xz/coder.c:970 src/xz/file_io.c:605 src/xz/file_io.c:679
-#: src/xz/file_io.c:769 src/xz/file_io.c:940 src/xz/list.c:369
-#: src/xz/list.c:415 src/xz/list.c:477 src/xz/list.c:581 src/xz/list.c:590
+#: src/xz/args.c:622 src/xz/coder.c:1059 src/xz/coder.c:1075
+#: src/xz/coder.c:1375 src/xz/coder.c:1378 src/xz/file_io.c:686
+#: src/xz/file_io.c:760 src/xz/file_io.c:850 src/xz/file_io.c:1021
+#: src/xz/list.c:369 src/xz/list.c:415 src/xz/list.c:477 src/xz/list.c:591
+#: src/xz/list.c:600
 #, c-format
 msgid "%s: %s"
 msgstr "%s：%s"
 
-#: src/xz/args.c:589
+#: src/xz/args.c:678
 #, c-format
 msgid "The environment variable %s contains too many arguments"
 msgstr "环境变量 %s 包含过多参数"
 
-#: src/xz/args.c:691
+#: src/xz/args.c:780
 msgid "Compression support was disabled at build time"
 msgstr "压缩支持已在构建时禁用"
 
-#: src/xz/args.c:698
+#: src/xz/args.c:787
 msgid "Decompression support was disabled at build time"
 msgstr "解压支持已在构建时禁用"
 
-#: src/xz/args.c:704
+#: src/xz/args.c:793
 msgid "Compression of lzip files (.lz) is not supported"
 msgstr "不支持对 lzip 文件 (.lz) 的压缩"
 
-#: src/xz/args.c:735
+#: src/xz/args.c:815
+msgid "--block-list is ignored unless compressing to the .xz format"
+msgstr "除非压缩为 .xz 格式，--block-list 将被忽略"
+
+#: src/xz/args.c:828 src/xz/args.c:837
 msgid "With --format=raw, --suffix=.SUF is required unless writing to stdout"
 msgstr "启用 --format-raw 选项时，必须指定 --suffix=.SUF 获知写入至标准输出"
 
-#: src/xz/coder.c:115
+#: src/xz/coder.c:141
 msgid "Maximum number of filters is four"
 msgstr "过滤器最多数量为四"
 
-#: src/xz/coder.c:134
+#: src/xz/coder.c:179
+#, c-format
+msgid "Error in --filters%s=FILTERS option:"
+msgstr "在 --filters%s=过滤器 选项中出现错误："
+
+#: src/xz/coder.c:229
 msgid "Memory usage limit is too low for the given filter setup."
 msgstr "内存用量限制对指定过滤器设置过低。"
 
-#: src/xz/coder.c:169
+#: src/xz/coder.c:244
+#, c-format
+msgid "filter chain %u used by --block-list but not specified with --filters%u="
+msgstr "--block-list 使用了过滤器链 %u，但未经由 --filters%u= 指定"
+
+#: src/xz/coder.c:375
 msgid "Using a preset in raw mode is discouraged."
 msgstr "不推荐在 raw 模式使用预设等级。"
 
-#: src/xz/coder.c:171
+#: src/xz/coder.c:377
 msgid "The exact options of the presets may vary between software versions."
 msgstr "各个预设等级所使用的准确选项列表在不同软件版本之间可能不同。"
 
-#: src/xz/coder.c:194
+#: src/xz/coder.c:403
 msgid "The .lzma format supports only the LZMA1 filter"
 msgstr ".lzma 格式只支持 LZMA1 过滤器"
 
-#: src/xz/coder.c:202
+#: src/xz/coder.c:411
 msgid "LZMA1 cannot be used with the .xz format"
 msgstr "LZMA1 无法用于 .xz 格式"
 
-#: src/xz/coder.c:219
-msgid "The filter chain is incompatible with --flush-timeout"
-msgstr "过滤器链和 --flush-timeout 不兼容"
+#: src/xz/coder.c:435
+#, c-format
+msgid "Filter chain %u is incompatible with --flush-timeout"
+msgstr "过滤器链 %u 和 --flush-timeout 不兼容"
 
-#: src/xz/coder.c:225
+#: src/xz/coder.c:444
 msgid "Switching to single-threaded mode due to --flush-timeout"
 msgstr "因 --flush-timeout 而切换至单线程模式"
 
-#: src/xz/coder.c:249
+#: src/xz/coder.c:485
+#, c-format
+msgid "Unsupported options in filter chain %u"
+msgstr "过滤器链 %u 中存在不支持的选项"
+
+#: src/xz/coder.c:516
 #, c-format
 msgid "Using up to %<PRIu32> threads."
 msgstr "使用最多 %<PRIu32> 个线程。"
 
-#: src/xz/coder.c:265
+#: src/xz/coder.c:532
 msgid "Unsupported filter chain or filter options"
 msgstr "不支持的过滤器链或过滤器选项"
 
-#: src/xz/coder.c:277
+#: src/xz/coder.c:553
 #, c-format
 msgid "Decompression will need %s MiB of memory."
 msgstr "解压缩需要 %s MiB 的内存。"
 
-#: src/xz/coder.c:309
+#: src/xz/coder.c:585
 #, c-format
 msgid "Reduced the number of threads from %s to %s to not exceed the memory usage limit of %s MiB"
 msgstr "已将所使用的线程数从 %s 减小为 %s，以不超出 %s MiB 的内存用量限制"
 
-#: src/xz/coder.c:329
+#: src/xz/coder.c:605
 #, c-format
 msgid "Reduced the number of threads from %s to one. The automatic memory usage limit of %s MiB is still being exceeded. %s MiB of memory is required. Continuing anyway."
 msgstr "已将所使用的线程数从 %s 减小为 1。这仍然超出了自动的内存使用限制 %s MiB。需要 %s MiB 的内存。继续操作。"
 
-#: src/xz/coder.c:356
+#: src/xz/coder.c:632
 #, c-format
 msgid "Switching to single-threaded mode to not exceed the memory usage limit of %s MiB"
 msgstr "正在切换到单线程模式以不超出 %s MiB 的内存用量限制"
 
-#: src/xz/coder.c:411
+#: src/xz/coder.c:757
 #, c-format
 msgid "Adjusted LZMA%c dictionary size from %s MiB to %s MiB to not exceed the memory usage limit of %s MiB"
 msgstr "已调整 LZMA%c 字典大小（从 %s MiB 调整为 %s MiB），以不超出 %s MiB 的内存用量限制"
 
-#: src/xz/file_io.c:110 src/xz/file_io.c:118
+#: src/xz/coder.c:767
+#, fuzzy, c-format
+#| msgid "Adjusted LZMA%c dictionary size from %s MiB to %s MiB to not exceed the memory usage limit of %s MiB"
+msgid "Adjusted LZMA%c dictionary size for --filters%u from %s MiB to %s MiB to not exceed the memory usage limit of %s MiB"
+msgstr "已调整 LZMA%c 字典大小（从 %s MiB 调整为 %s MiB），以不超出 %s MiB 的内存用量限制"
+
+#: src/xz/coder.c:1141
+#, c-format
+msgid "Error changing to filter chain %u: %s"
+msgstr "更改为过滤器链 %u 时出错：%s"
+
+#: src/xz/file_io.c:137 src/xz/file_io.c:145
 #, c-format
 msgid "Error creating a pipe: %s"
 msgstr "创建管道时出错：%s"
 
-#: src/xz/file_io.c:252
+#: src/xz/file_io.c:333
 msgid "Failed to enable the sandbox"
 msgstr "沙盒启用失败"
 
-#: src/xz/file_io.c:294
+#: src/xz/file_io.c:375
 #, c-format
 msgid "%s: poll() failed: %s"
 msgstr "%s：poll() 失败：%s"
@@ -169,111 +206,111 @@ msgstr "%s：poll() 失败：%s"
 #. it is possible that the user has put a new file in place
 #. of the original file, and in that case it obviously
 #. shouldn't be removed.
-#: src/xz/file_io.c:361
+#: src/xz/file_io.c:442
 #, c-format
 msgid "%s: File seems to have been moved, not removing"
 msgstr "%s：文件似乎已移动，不再进行删除操作"
 
-#: src/xz/file_io.c:368 src/xz/file_io.c:924
+#: src/xz/file_io.c:449 src/xz/file_io.c:1005
 #, c-format
 msgid "%s: Cannot remove: %s"
 msgstr "%s：无法删除：%s"
 
-#: src/xz/file_io.c:394
+#: src/xz/file_io.c:475
 #, c-format
 msgid "%s: Cannot set the file owner: %s"
 msgstr "%s：无法设置文件所有者：%s"
 
-#: src/xz/file_io.c:407
+#: src/xz/file_io.c:488
 #, c-format
 msgid "%s: Cannot set the file group: %s"
 msgstr "%s：无法设置文件所有组：%s"
 
-#: src/xz/file_io.c:426
+#: src/xz/file_io.c:507
 #, c-format
 msgid "%s: Cannot set the file permissions: %s"
 msgstr "%s：无法设置文件权限：%s"
 
-#: src/xz/file_io.c:552
+#: src/xz/file_io.c:633
 #, c-format
 msgid "Error getting the file status flags from standard input: %s"
 msgstr "从标准输入获取文件状态标志出错：%s"
 
-#: src/xz/file_io.c:610 src/xz/file_io.c:672
+#: src/xz/file_io.c:691 src/xz/file_io.c:753
 #, c-format
 msgid "%s: Is a symbolic link, skipping"
 msgstr "%s：是符号链接，跳过"
 
-#: src/xz/file_io.c:701
+#: src/xz/file_io.c:782
 #, c-format
 msgid "%s: Is a directory, skipping"
 msgstr "%s：是目录，跳过"
 
-#: src/xz/file_io.c:707
+#: src/xz/file_io.c:788
 #, c-format
 msgid "%s: Not a regular file, skipping"
 msgstr "%s：不是标准文件，跳过"
 
-#: src/xz/file_io.c:724
+#: src/xz/file_io.c:805
 #, c-format
 msgid "%s: File has setuid or setgid bit set, skipping"
 msgstr "%s：文件有设置用户ID或设置组ID标识，跳过"
 
-#: src/xz/file_io.c:731
+#: src/xz/file_io.c:812
 #, c-format
 msgid "%s: File has sticky bit set, skipping"
 msgstr "%s：文件有粘滞位标识，跳过"
 
-#: src/xz/file_io.c:738
+#: src/xz/file_io.c:819
 #, c-format
 msgid "%s: Input file has more than one hard link, skipping"
 msgstr "%s：输入文件有多于一个硬链接，跳过"
 
-#: src/xz/file_io.c:780
+#: src/xz/file_io.c:861
 msgid "Empty filename, skipping"
 msgstr "空文件名，跳过"
 
-#: src/xz/file_io.c:834
+#: src/xz/file_io.c:915
 #, c-format
 msgid "Error restoring the status flags to standard input: %s"
 msgstr "回复标准输入的状态标志时出错：%s"
 
-#: src/xz/file_io.c:882
+#: src/xz/file_io.c:963
 #, c-format
 msgid "Error getting the file status flags from standard output: %s"
 msgstr "获取标准输出的文件状态标志时出错：%s"
 
-#: src/xz/file_io.c:1060
+#: src/xz/file_io.c:1162
 #, c-format
 msgid "Error restoring the O_APPEND flag to standard output: %s"
 msgstr "恢复标准输出的 O_APPEND 标志时出错：%s"
 
-#: src/xz/file_io.c:1072
+#: src/xz/file_io.c:1174
 #, c-format
 msgid "%s: Closing the file failed: %s"
 msgstr "%s：关闭文件失败：%s"
 
-#: src/xz/file_io.c:1108 src/xz/file_io.c:1371
+#: src/xz/file_io.c:1210 src/xz/file_io.c:1472
 #, c-format
 msgid "%s: Seeking failed when trying to create a sparse file: %s"
 msgstr "%s：尝试创建稀疏文件时 seek 失败：%s"
 
-#: src/xz/file_io.c:1209
+#: src/xz/file_io.c:1310
 #, c-format
 msgid "%s: Read error: %s"
 msgstr "%s：读取错误：%s"
 
-#: src/xz/file_io.c:1239
+#: src/xz/file_io.c:1340
 #, c-format
 msgid "%s: Error seeking the file: %s"
 msgstr "%s：seek 文件时出错：%s"
 
-#: src/xz/file_io.c:1263
+#: src/xz/file_io.c:1364
 #, c-format
 msgid "%s: Unexpected end of file"
 msgstr "%s：未预期的文件结束"
 
-#: src/xz/file_io.c:1322
+#: src/xz/file_io.c:1423
 #, c-format
 msgid "%s: Write error: %s"
 msgstr "%s：写入错误：%s"
@@ -492,63 +529,63 @@ msgstr "%s：过小而不是有效的 .xz 文件"
 #. to Ratio, the columns are right aligned. Check and Filename
 #. are left aligned. If you need longer words, it's OK to
 #. use two lines here. Test with "xz -l foo.xz".
-#: src/xz/list.c:731
+#: src/xz/list.c:741
 msgid "Strms  Blocks   Compressed Uncompressed  Ratio  Check   Filename"
 msgstr "   流      块     压缩大小     解压大小   比例  校验    文件名"
 
-#: src/xz/list.c:1026 src/xz/list.c:1204
+#: src/xz/list.c:1036 src/xz/list.c:1214
 msgid "Yes"
 msgstr "是"
 
-#: src/xz/list.c:1026 src/xz/list.c:1204
+#: src/xz/list.c:1036 src/xz/list.c:1214
 msgid "No"
 msgstr "否"
 
-#: src/xz/list.c:1028 src/xz/list.c:1206
+#: src/xz/list.c:1038 src/xz/list.c:1216
 #, c-format
 msgid "  Minimum XZ Utils version: %s\n"
 msgstr "  最低 XZ Utils 版本：%s\n"
 
 #. TRANSLATORS: %s is an integer. Only the plural form of this
 #. message is used (e.g. "2 files"). Test with "xz -l foo.xz bar.xz".
-#: src/xz/list.c:1179
+#: src/xz/list.c:1189
 #, c-format
 msgid "%s file\n"
 msgid_plural "%s files\n"
 msgstr[0] "%s 文件\n"
 
-#: src/xz/list.c:1192
+#: src/xz/list.c:1202
 msgid "Totals:"
 msgstr "总计："
 
-#: src/xz/list.c:1270
+#: src/xz/list.c:1280
 msgid "--list works only on .xz files (--format=xz or --format=auto)"
 msgstr "--list 仅适用于 .xz 文件（--format=xz 或 --format=auto）"
 
-#: src/xz/list.c:1276
+#: src/xz/list.c:1286
 msgid "--list does not support reading from standard input"
 msgstr "--list 不支持从标准输入读取"
 
-#: src/xz/main.c:89
+#: src/xz/main.c:96
 #, c-format
 msgid "%s: Error reading filenames: %s"
 msgstr "%s：读取文件名列表时出错：%s"
 
-#: src/xz/main.c:96
+#: src/xz/main.c:103
 #, c-format
 msgid "%s: Unexpected end of input when reading filenames"
 msgstr "%s：读取文件名列表时遇到未预期的输入结束"
 
-#: src/xz/main.c:120
+#: src/xz/main.c:127
 #, c-format
-msgid "%s: Null character found when reading filenames; maybe you meant to use `--files0' instead of `--files'?"
-msgstr "%s：读取文件名列表时获得了空字符；您可能想要使用“--files0”而非“--files”？"
+msgid "%s: Null character found when reading filenames; maybe you meant to use '--files0' instead of '--files'?"
+msgstr "%s：读取文件名列表时获得了空字符；您可能想要使用 '--files0' 而非 '--files'？"
 
-#: src/xz/main.c:188
+#: src/xz/main.c:207
 msgid "Compression and decompression with --robot are not supported yet."
 msgstr "尚不支持带 --robot 的压缩和解压缩。"
 
-#: src/xz/main.c:266
+#: src/xz/main.c:285
 msgid "Cannot read data from standard input when reading filenames from standard input"
 msgstr "无法同时从标准输入读取数据和文件名列表"
 
@@ -556,68 +593,68 @@ msgstr "无法同时从标准输入读取数据和文件名列表"
 #. of the line in messages. Usually it becomes "xz: ".
 #. This is a translatable string because French needs
 #. a space before a colon.
-#: src/xz/message.c:670 src/xz/message.c:725
+#: src/xz/message.c:671 src/xz/message.c:726
 #, c-format
 msgid "%s: "
 msgstr "%s："
 
-#: src/xz/message.c:797 src/xz/message.c:856
+#: src/xz/message.c:798 src/xz/message.c:857
 msgid "Internal error (bug)"
 msgstr "内部错误（bug）"
 
-#: src/xz/message.c:804
+#: src/xz/message.c:805
 msgid "Cannot establish signal handlers"
 msgstr "无法建立信号处理器"
 
-#: src/xz/message.c:813
+#: src/xz/message.c:814
 msgid "No integrity check; not verifying file integrity"
 msgstr "无完整性检查；将不验证文件完整性"
 
-#: src/xz/message.c:816
+#: src/xz/message.c:817
 msgid "Unsupported type of integrity check; not verifying file integrity"
 msgstr "不支持的完整性检查类型；将不验证文件完整性"
 
-#: src/xz/message.c:823
+#: src/xz/message.c:824
 msgid "Memory usage limit reached"
 msgstr "达到内存使用限制"
 
-#: src/xz/message.c:826
+#: src/xz/message.c:827
 msgid "File format not recognized"
 msgstr "无法识别文件格式"
 
-#: src/xz/message.c:829
+#: src/xz/message.c:830
 msgid "Unsupported options"
 msgstr "不支持的选项"
 
-#: src/xz/message.c:832
+#: src/xz/message.c:833
 msgid "Compressed data is corrupt"
 msgstr "压缩数据已损坏"
 
-#: src/xz/message.c:835
+#: src/xz/message.c:836
 msgid "Unexpected end of input"
 msgstr "输入意外结束"
 
-#: src/xz/message.c:877
+#: src/xz/message.c:878
 #, c-format
 msgid "%s MiB of memory is required. The limiter is disabled."
 msgstr "需要 %s MiB 的内存空间。限制已禁用。"
 
-#: src/xz/message.c:905
+#: src/xz/message.c:906
 #, c-format
 msgid "%s MiB of memory is required. The limit is %s."
 msgstr "需要 %s MiB 的内存空间。限制为 %s。"
 
-#: src/xz/message.c:924
+#: src/xz/message.c:925
 #, c-format
 msgid "%s: Filter chain: %s\n"
 msgstr "%s：过滤器链：%s\n"
 
-#: src/xz/message.c:935
+#: src/xz/message.c:936
 #, c-format
-msgid "Try `%s --help' for more information."
-msgstr "请尝试执行“%s --help”来获取更多信息。"
+msgid "Try '%s --help' for more information."
+msgstr "请尝试执行 '%s --help' 来获取更多信息。"
 
-#: src/xz/message.c:961
+#: src/xz/message.c:962
 #, c-format
 msgid ""
 "Usage: %s [OPTION]... [FILE]...\n"
@@ -628,15 +665,15 @@ msgstr ""
 "使用 .xz 格式压缩或解压缩文件。\n"
 "\n"
 
-#: src/xz/message.c:968
+#: src/xz/message.c:969
 msgid "Mandatory arguments to long options are mandatory for short options too.\n"
 msgstr "必选参数对长短选项同时适用。\n"
 
-#: src/xz/message.c:972
+#: src/xz/message.c:973
 msgid " Operation mode:\n"
 msgstr " 操作模式：\n"
 
-#: src/xz/message.c:975
+#: src/xz/message.c:976
 msgid ""
 "  -z, --compress      force compression\n"
 "  -d, --decompress    force decompression\n"
@@ -648,7 +685,7 @@ msgstr ""
 "  -t, --test          测试压缩文件完整性\n"
 "  -l, --list          列出 .xz 文件的信息"
 
-#: src/xz/message.c:981
+#: src/xz/message.c:982
 msgid ""
 "\n"
 " Operation modifiers:\n"
@@ -656,7 +693,7 @@ msgstr ""
 "\n"
 " 操作修饰符：\n"
 
-#: src/xz/message.c:984
+#: src/xz/message.c:985
 msgid ""
 "  -k, --keep          keep (don't delete) input files\n"
 "  -f, --force         force overwrite of output file and (de)compress links\n"
@@ -666,16 +703,24 @@ msgstr ""
 "  -f, --force         强制覆写输出文件和（解）压缩链接\n"
 "  -c, --stdout        向标准输出写入，同时不要删除输入文件"
 
-#: src/xz/message.c:993
+#: src/xz/message.c:994
 msgid ""
 "      --single-stream decompress only the first stream, and silently\n"
 "                      ignore possible remaining input data"
 msgstr "      --single-stream 仅解压缩第一个流，忽略其后可能继续出现的输入数据"
 
-#: src/xz/message.c:996
+#: src/xz/message.c:997
+#, fuzzy
+#| msgid ""
+#| "      --no-sparse     do not create sparse files when decompressing\n"
+#| "  -S, --suffix=.SUF   use the suffix `.SUF' on compressed files\n"
+#| "      --files[=FILE]  read filenames to process from FILE; if FILE is\n"
+#| "                      omitted, filenames are read from the standard input;\n"
+#| "                      filenames must be terminated with the newline character\n"
+#| "      --files0[=FILE] like --files but use the null character as terminator"
 msgid ""
 "      --no-sparse     do not create sparse files when decompressing\n"
-"  -S, --suffix=.SUF   use the suffix `.SUF' on compressed files\n"
+"  -S, --suffix=.SUF   use the suffix '.SUF' on compressed files\n"
 "      --files[=FILE]  read filenames to process from FILE; if FILE is\n"
 "                      omitted, filenames are read from the standard input;\n"
 "                      filenames must be terminated with the newline character\n"
@@ -687,7 +732,7 @@ msgstr ""
 "                      将从标准输入读取文件名列表；文件名必须使用换行符分隔\n"
 "      --files0[=文件] 类似 --files，但使用空字符进行分隔"
 
-#: src/xz/message.c:1005
+#: src/xz/message.c:1006
 msgid ""
 "\n"
 " Basic file format and compression options:\n"
@@ -695,12 +740,18 @@ msgstr ""
 "\n"
 " 基本文件格式和压缩选项：\n"
 
-#: src/xz/message.c:1007
+#: src/xz/message.c:1008
+#, fuzzy
+#| msgid ""
+#| "  -F, --format=FMT    file format to encode or decode; possible values are\n"
+#| "                      `auto' (default), `xz', `lzma', `lzip', and `raw'\n"
+#| "  -C, --check=CHECK   integrity check type: `none' (use with caution),\n"
+#| "                      `crc32', `crc64' (default), or `sha256'"
 msgid ""
 "  -F, --format=FMT    file format to encode or decode; possible values are\n"
-"                      `auto' (default), `xz', `lzma', `lzip', and `raw'\n"
-"  -C, --check=CHECK   integrity check type: `none' (use with caution),\n"
-"                      `crc32', `crc64' (default), or `sha256'"
+"                      'auto' (default), 'xz', 'lzma', 'lzip', and 'raw'\n"
+"  -C, --check=CHECK   integrity check type: 'none' (use with caution),\n"
+"                      'crc32', 'crc64' (default), or 'sha256'"
 msgstr ""
 "  -F, --format=格式   要编码或解码的文件格式；可能的值包括\n"
 "                      “auto”（默认）、“xz”、“lzma”、\n"
@@ -708,11 +759,11 @@ msgstr ""
 "  -C, --check=类型    完整性检查类型：“none”（请谨慎使用）、\n"
 "                      “crc32”、“crc64”（默认）或“sha256”"
 
-#: src/xz/message.c:1012
+#: src/xz/message.c:1013
 msgid "      --ignore-check  don't verify the integrity check when decompressing"
 msgstr "      --ignore-check  解压缩时不要进行完整性检查验证"
 
-#: src/xz/message.c:1016
+#: src/xz/message.c:1017
 msgid ""
 "  -0 ... -9           compression preset; default is 6; take compressor *and*\n"
 "                      decompressor memory usage into account before using 7-9!"
@@ -720,7 +771,7 @@ msgstr ""
 "  -0 ... -9           压缩预设等级；默认为 6；使用 7-9 的等级之前，请先考虑\n"
 "                      压缩和解压缩所需的内存用量！（会占用大量内存空间）"
 
-#: src/xz/message.c:1020
+#: src/xz/message.c:1021
 msgid ""
 "  -e, --extreme       try to improve compression ratio by using more CPU time;\n"
 "                      does not affect decompressor memory requirements"
@@ -728,15 +779,19 @@ msgstr ""
 "  -e, --extreme       尝试使用更多 CPU 时间来改进压缩比率；\n"
 "                      不会影响解压缩的内存需求量"
 
-#: src/xz/message.c:1024
+#: src/xz/message.c:1025
+#, fuzzy
+#| msgid ""
+#| "  -T, --threads=NUM   use at most NUM threads; the default is 1; set to 0\n"
+#| "                      to use as many threads as there are processor cores"
 msgid ""
-"  -T, --threads=NUM   use at most NUM threads; the default is 1; set to 0\n"
-"                      to use as many threads as there are processor cores"
+"  -T, --threads=NUM   use at most NUM threads; the default is 0 which uses\n"
+"                      as many threads as there are processor cores"
 msgstr ""
 "  -T, --threads=数量  使用最多指定数量的线程；默认值为 1；设置为 0\n"
 "                      可以使用与处理器内核数量相同的线程数"
 
-#: src/xz/message.c:1029
+#: src/xz/message.c:1030
 msgid ""
 "      --block-size=SIZE\n"
 "                      start a new .xz block after every SIZE bytes of input;\n"
@@ -746,17 +801,24 @@ msgstr ""
 "                      输入每读取指定块大小的数据后即开始一个新的 .xz 块；\n"
 "                      使用该选项可以设置多线程压缩中的块大小"
 
-#: src/xz/message.c:1033
+#: src/xz/message.c:1034
+#, fuzzy
+#| msgid ""
+#| "      --block-list=SIZES\n"
+#| "                      start a new .xz block after the given comma-separated\n"
+#| "                      intervals of uncompressed data"
 msgid ""
-"      --block-list=SIZES\n"
+"      --block-list=BLOCKS\n"
 "                      start a new .xz block after the given comma-separated\n"
-"                      intervals of uncompressed data"
+"                      intervals of uncompressed data; optionally, specify a\n"
+"                      filter chain number (0-9) followed by a ':' before the\n"
+"                      uncompressed data size"
 msgstr ""
 "      --block-list=块大小列表\n"
 "                      在所给出的未压缩数据间隔大小的数据之后开始一个新的\n"
 "                      .xz 块（使用逗号分隔）"
 
-#: src/xz/message.c:1037
+#: src/xz/message.c:1040
 msgid ""
 "      --flush-timeout=TIMEOUT\n"
 "                      when compressing, if more than TIMEOUT milliseconds has\n"
@@ -767,7 +829,7 @@ msgstr ""
 "                      进行压缩时，如果从上次刷洗输出之后经过了指定的超时时间\n"
 "                      且读取更多数据会被阻塞，则刷洗输出所有缓冲数据"
 
-#: src/xz/message.c:1043
+#: src/xz/message.c:1046
 #, no-c-format
 msgid ""
 "      --memlimit-compress=LIMIT\n"
@@ -786,13 +848,13 @@ msgstr ""
 "                      所指定限制量单位为字节，或以百分号 % 结尾表示内存比例，\n"
 "                      或者指定 0 取软件默认值"
 
-#: src/xz/message.c:1052
+#: src/xz/message.c:1055
 msgid ""
 "      --no-adjust     if compression settings exceed the memory usage limit,\n"
 "                      give an error instead of adjusting the settings downwards"
 msgstr "      --no-adjust     如果压缩设置超出内存用量限制，不调整设置而直接报错"
 
-#: src/xz/message.c:1058
+#: src/xz/message.c:1061
 msgid ""
 "\n"
 " Custom filter chain for compression (alternative for using presets):"
@@ -800,7 +862,27 @@ msgstr ""
 "\n"
 " 用于压缩的自定义过滤器链（不使用预设等级时的备选用法）："
 
-#: src/xz/message.c:1067
+#: src/xz/message.c:1064
+msgid ""
+"\n"
+"  --filters=FILTERS   set the filter chain using the liblzma filter string\n"
+"                      syntax; use --filters-help for more information"
+msgstr ""
+
+#: src/xz/message.c:1070
+msgid ""
+"  --filters1=FILTERS ... --filters9=FILTERS\n"
+"                      set additional filter chains using the liblzma filter\n"
+"                      string syntax to use with --block-list"
+msgstr ""
+
+#: src/xz/message.c:1076
+msgid ""
+"  --filters-help      display more information about the liblzma filter string\n"
+"                      syntax and exit."
+msgstr ""
+
+#: src/xz/message.c:1087
 msgid ""
 "\n"
 "  --lzma1[=OPTS]      LZMA1 or LZMA2; OPTS is a comma-separated list of zero or\n"
@@ -829,7 +911,19 @@ msgstr ""
 "                                   (hc3, hc4, bt2, bt3, bt4; bt4)\n"
 "                        depth=数字 最大搜索深度； 0=自动（默认）"
 
-#: src/xz/message.c:1082
+#: src/xz/message.c:1102
+#, fuzzy
+#| msgid ""
+#| "\n"
+#| "  --x86[=OPTS]        x86 BCJ filter (32-bit and 64-bit)\n"
+#| "  --arm[=OPTS]        ARM BCJ filter\n"
+#| "  --armthumb[=OPTS]   ARM-Thumb BCJ filter\n"
+#| "  --arm64[=OPTS]      ARM64 BCJ filter\n"
+#| "  --powerpc[=OPTS]    PowerPC BCJ filter (big endian only)\n"
+#| "  --ia64[=OPTS]       IA-64 (Itanium) BCJ filter\n"
+#| "  --sparc[=OPTS]      SPARC BCJ filter\n"
+#| "                      Valid OPTS for all BCJ filters:\n"
+#| "                        start=NUM  start offset for conversions (default=0)"
 msgid ""
 "\n"
 "  --x86[=OPTS]        x86 BCJ filter (32-bit and 64-bit)\n"
@@ -839,6 +933,7 @@ msgid ""
 "  --powerpc[=OPTS]    PowerPC BCJ filter (big endian only)\n"
 "  --ia64[=OPTS]       IA-64 (Itanium) BCJ filter\n"
 "  --sparc[=OPTS]      SPARC BCJ filter\n"
+"  --riscv[=OPTS]      RISC-V BCJ filter\n"
 "                      Valid OPTS for all BCJ filters:\n"
 "                        start=NUM  start offset for conversions (default=0)"
 msgstr ""
@@ -853,7 +948,7 @@ msgstr ""
 "                      所有过滤器可用选项：\n"
 "                        start=数字  转换的起始偏移量（默认=0）"
 
-#: src/xz/message.c:1095
+#: src/xz/message.c:1116
 msgid ""
 "\n"
 "  --delta[=OPTS]      Delta filter; valid OPTS (valid values; default):\n"
@@ -864,7 +959,7 @@ msgstr ""
 "  --delta[=选项]      增量过滤器；有效选项（有效值；默认值）：\n"
 "                        dist=NUM   相减的字节之间的距离 (1-256; 1)"
 
-#: src/xz/message.c:1103
+#: src/xz/message.c:1124
 msgid ""
 "\n"
 " Other options:\n"
@@ -872,7 +967,7 @@ msgstr ""
 "\n"
 " 其它选项：\n"
 
-#: src/xz/message.c:1106
+#: src/xz/message.c:1127
 msgid ""
 "  -q, --quiet         suppress warnings; specify twice to suppress errors too\n"
 "  -v, --verbose       be verbose; specify twice for even more verbose"
@@ -880,21 +975,21 @@ msgstr ""
 "  -q, --quiet         不显示警告信息；指定两次可不显示错误信息\n"
 "  -v, --verbose       输出详细信息；指定两次可以输出更详细的信息"
 
-#: src/xz/message.c:1111
+#: src/xz/message.c:1132
 msgid "  -Q, --no-warn       make warnings not affect the exit status"
 msgstr "  -Q, --no-warn       使得警告信息不影响程序退出返回值"
 
-#: src/xz/message.c:1113
+#: src/xz/message.c:1134
 msgid "      --robot         use machine-parsable messages (useful for scripts)"
 msgstr "      --robot         使用机器可解析的信息（对于脚本有用）"
 
-#: src/xz/message.c:1116
+#: src/xz/message.c:1137
 msgid ""
 "      --info-memory   display the total amount of RAM and the currently active\n"
 "                      memory usage limits, and exit"
 msgstr "      --info-memory   显示 RAM 总量和当前配置的内存用量限制，然后退出"
 
-#: src/xz/message.c:1119
+#: src/xz/message.c:1140
 msgid ""
 "  -h, --help          display the short help (lists only the basic options)\n"
 "  -H, --long-help     display this long help and exit"
@@ -902,7 +997,7 @@ msgstr ""
 "  -h, --help          显示短帮助信息（仅列出基本选项）\n"
 "  -H, --long-help     显示本长帮助信息"
 
-#: src/xz/message.c:1123
+#: src/xz/message.c:1144
 msgid ""
 "  -h, --help          display this short help and exit\n"
 "  -H, --long-help     display the long help (lists also the advanced options)"
@@ -910,11 +1005,11 @@ msgstr ""
 "  -h, --help          显示本短帮助信息并退出\n"
 "  -H, --long-help     显示长帮助信息（同时列出高级选项）"
 
-#: src/xz/message.c:1128
+#: src/xz/message.c:1149
 msgid "  -V, --version       display the version number and exit"
 msgstr "  -V, --version       显示软件版本号并退出"
 
-#: src/xz/message.c:1130
+#: src/xz/message.c:1151
 msgid ""
 "\n"
 "With no FILE, or when FILE is -, read standard input.\n"
@@ -926,7 +1021,7 @@ msgstr ""
 #. for this package. Please add _another line_ saying
 #. "Report translation bugs to <...>\n" with the email or WWW
 #. address for translation bugs. Thanks.
-#: src/xz/message.c:1136
+#: src/xz/message.c:1157
 #, c-format
 msgid "Report bugs to <%s> (in English or Finnish).\n"
 msgstr ""
@@ -934,19 +1029,33 @@ msgstr ""
 "请使用中文向 TP 简体中文翻译团队 <i18n-zh@googlegroups.com>\n"
 "报告软件的简体中文翻译错误。\n"
 
-#: src/xz/message.c:1138
+#: src/xz/message.c:1159
 #, c-format
 msgid "%s home page: <%s>\n"
 msgstr "%s 主页：<%s>\n"
 
-#: src/xz/message.c:1142
+#: src/xz/message.c:1163
 msgid "THIS IS A DEVELOPMENT VERSION NOT INTENDED FOR PRODUCTION USE."
 msgstr "这是开发版本，不适用于生产环境使用。"
 
+#: src/xz/message.c:1180
+msgid ""
+"Filter chains are set using the --filters=FILTERS or\n"
+"--filters1=FILTERS ... --filters9=FILTERS options. Each filter in the chain\n"
+"can be separated by spaces or '--'. Alternatively a preset <0-9>[e] can be\n"
+"specified instead of a filter chain.\n"
+msgstr ""
+
+#: src/xz/message.c:1186
+#, fuzzy
+#| msgid "Unsupported filter chain or filter options"
+msgid "The supported filters and their options are:"
+msgstr "不支持的过滤器链或过滤器选项"
+
 #: src/xz/options.c:86
 #, c-format
-msgid "%s: Options must be `name=value' pairs separated with commas"
-msgstr "%s：选项必须按照“名称=值”的格式成对出现，使用半角逗号分隔"
+msgid "%s: Options must be 'name=value' pairs separated with commas"
+msgstr "%s：选项必须按照 '名称=值' 的格式成对出现，使用半角逗号分隔"
 
 #: src/xz/options.c:93
 #, c-format
@@ -958,54 +1067,57 @@ msgstr "%s：无效的选项名称"
 msgid "%s: Invalid option value"
 msgstr "%s：无效的选项值"
 
-#: src/xz/options.c:247
+#: src/xz/options.c:248
 #, c-format
 msgid "Unsupported LZMA1/LZMA2 preset: %s"
 msgstr "不支持的 LZMA1/LZMA2 预设等级：%s"
 
-#: src/xz/options.c:355
+#: src/xz/options.c:356
 msgid "The sum of lc and lp must not exceed 4"
 msgstr "lc 和 lp 的和必须不大于 4"
 
-#: src/xz/suffix.c:160
+#: src/xz/suffix.c:166
 #, c-format
 msgid "%s: Filename has an unknown suffix, skipping"
 msgstr "%s：文件名有未知后缀，跳过"
 
-#: src/xz/suffix.c:181
+#: src/xz/suffix.c:187
 #, c-format
-msgid "%s: File already has `%s' suffix, skipping"
-msgstr "%s：文件已有“%s”后缀名，跳过"
+msgid "%s: File already has '%s' suffix, skipping"
+msgstr "%s：文件已有 '%s' 后缀名，跳过"
 
-#: src/xz/suffix.c:388
+#: src/xz/suffix.c:394
 #, c-format
 msgid "%s: Invalid filename suffix"
 msgstr "%s：无效的文件名后缀"
 
-#: src/xz/util.c:71
+#: src/xz/util.c:107
 #, c-format
 msgid "%s: Value is not a non-negative decimal integer"
 msgstr "%s：值不是非负十进制整数"
 
-#: src/xz/util.c:113
+#: src/xz/util.c:149
 #, c-format
 msgid "%s: Invalid multiplier suffix"
 msgstr "%s：无效的乘数后缀"
 
-#: src/xz/util.c:115
-msgid "Valid suffixes are `KiB' (2^10), `MiB' (2^20), and `GiB' (2^30)."
+#: src/xz/util.c:151
+#, fuzzy
+#| msgid "Valid suffixes are `KiB' (2^10), `MiB' (2^20), and `GiB' (2^30)."
+msgid "Valid suffixes are 'KiB' (2^10), 'MiB' (2^20), and 'GiB' (2^30)."
 msgstr "有效的后缀包括“KiB”（2^10）、“MiB”（2^20）和“GiB”（2^30）。"
 
-#: src/xz/util.c:132
-#, c-format
-msgid "Value of the option `%s' must be in the range [%<PRIu64>, %<PRIu64>]"
+#: src/xz/util.c:168
+#, fuzzy, c-format
+#| msgid "Value of the option `%s' must be in the range [%<PRIu64>, %<PRIu64>]"
+msgid "Value of the option '%s' must be in the range [%<PRIu64>, %<PRIu64>]"
 msgstr "选项“%s”的值必须位于 [%<PRIu64>, %<PRIu64>] 范围内"
 
-#: src/xz/util.c:269
+#: src/xz/util.c:291
 msgid "Compressed data cannot be read from a terminal"
 msgstr "压缩数据不能从终端读取"
 
-#: src/xz/util.c:282
+#: src/xz/util.c:304
 msgid "Compressed data cannot be written to a terminal"
 msgstr "压缩数据不能向终端写入"
 

po4a/.gitignore

@@ -1,2 +1,3 @@
 /man
 /xz-man.pot
+/*.po.authors