Add NEWS for 5.6.0.
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Jia Tan
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NEWS
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NEWS
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XZ Utils Release Notes
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======================
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5.6.0 (2024-02-24)
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This bumps the minor version of liblzma because new features were
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added. The API and ABI are still backward compatible with liblzma
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5.4.x and 5.2.x and 5.0.x.
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NOTE: As described in the NEWS for 5.5.2beta, the core components
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are now under the BSD Zero Clause License (0BSD).
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Since 5.5.2beta:
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* liblzma:
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- Disabled the branchless C variant in the LZMA decoder based
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on the benchmark results from the community.
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- Disabled x86-64 inline assembly on x32 to fix the build.
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* Sandboxing support in xz:
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- Landlock is now used even when xz needs to create files.
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In this case the sandbox is has to be more permissive than
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when no files need to be created. A similar thing was
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already in use with pledge(2) since 5.3.4alpha.
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- Landlock and pledge(2) are now stricter when reading from
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more than one input file and only writing to standard output.
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- Added support for Landlock ABI version 4.
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* CMake:
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- Default to -O2 instead of -O3 with CMAKE_BUILD_TYPE=Release.
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-O3 is not useful for speed and makes the code larger.
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- Now builds lzmainfo and lzmadec.
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- xzdiff, xzgrep, xzless, xzmore, and their symlinks are now
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installed. The scripts are also tested during "make test".
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- Added translation support for xz, lzmainfo, and the
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man pages.
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- Applied the symbol versioning workaround for MicroBlaze that
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is used in the Autotools build.
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- The general XZ Utils and liblzma API documentation is now
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installed.
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- The CMake component names were changed a little and several
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were added. liblzma_Runtime and liblzma_Development are
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unchanged.
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- Minimum required CMake version is now 3.14. However,
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translation support is disabled with CMake versions
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older than 3.20.
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- The CMake-based build is now close to feature parity with the
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Autotools-based build. Most importantly a few tests aren't
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run yet. Testing the CMake-based build on different operating
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systems would be welcome now. See the comment at the top of
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CMakeLists.txt.
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* Fixed a bug in the Autotools feature test for ARM64 CRC32
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instruction support for old versions of Clang. This did not
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affect the CMake build.
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* Windows:
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- The build instructions in INSTALL and windows/INSTALL*.txt
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were revised completely.
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- windows/build-with-cmake.bat along with the instructions
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in windows/INSTALL-MinGW-w64_with_CMake.txt should make
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it very easy to build liblzma.dll and xz.exe on Windows
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using CMake and MinGW-w64 with either GCC or Clang/LLVM.
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- windows/build.bash was updated. It now works on MSYS2 and
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on GNU/Linux (cross-compiling) to create a .zip and .7z
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package for 32-bit and 64-bit x86 using GCC + MinGW-w64.
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* The TODO file is no longer installed as part of the
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documentation. The file is out of date and does not reflect
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the actual tasks that will be completed in the future.
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* Translations:
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- Translated lzmainfo man pages are now installed. These
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had been forgotten in earlier versions.
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- Updated Croatian, Esperanto, German, Hungarian, Korean,
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Polish, Romanian, Spanish, Swedish, Vietnamese, and Ukrainian
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translations.
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- Updated German, Korean, Romanian, and Ukrainian man page
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translations.
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* Added a few tests.
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Summary of new features added in the 5.5.x development releases:
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* liblzma:
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- LZMA decoder: Speed optimizations to the C code and
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added GCC & Clang compatible inline assembly for x86-64.
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- Added lzma_mt_block_size() to recommend a Block size for
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multithreaded encoding.
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- Added CLMUL-based CRC32 on x86-64 and E2K with runtime
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processor detection. Similar to CRC64, on 32-bit x86 it
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isn't available unless --disable-assembler is used.
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- Optimized the CRC32 calculation on ARM64 platforms using the
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CRC32 instructions. Runtime detection for the instruction is
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used on GNU/Linux, FreeBSD, Windows, and macOS. If the
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compiler flags indicate unconditional CRC32 instruction
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support (+crc) then the generic version is not built.
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- Added definitions of mask values like
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LZMA_INDEX_CHECK_MASK_CRC32 to <lzma/index.h>.
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* xz:
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- Multithreaded mode is now the default. This improves
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compression speed and creates .xz files that can be
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decompressed in multithreaded mode. The downsides are
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increased memory usage and slightly worse compression ratio.
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- Added a new command line option --filters to set the filter
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chain using the liblzma filter string syntax.
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- Added new command line options --filters1 ... --filters9 to
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set additional filter chains using the liblzma filter string
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syntax. The --block-list option now allows specifying filter
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chains that were set using these new options.
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- Ported the command line tools to Windows MSVC.
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Visual Studio 2015 or later is required.
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* Added lz4 support to xzdiff/xzcmp and xzgrep.
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5.5.2beta (2024-02-14)
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* Licensing change: The core components are now under the
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