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Build: Let the users override the symbol versioning variant. 

There are cases when the users want to decide themselves whether
they want to have the generic (even on GNU/Linux) or the linux
(even if we do not recommend that) symbol versioning variant.
The former might be needed to circumvent compiler issues (i.e.
the compiler does not support all features that are required
for the linux versioning), the latter might help in overriding
the assumptions made in the configure script.
This commit is contained in:
Sergey Kosukhin 2024-03-12 20:03:49 +01:00 committed by Lasse Collin
parent a4f2e20d84
commit f56ed6fac6
1 changed files with 50 additions and 41 deletions
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91
configure.ac
View File

@ -716,52 +716,61 @@ elif test "x$enable_shared" = xno ; then
enable_symbol_versions=no
AC_MSG_RESULT([no (not building a shared library)])
else
case "$host_cpu-$host_os" in
microblaze*)
# GCC 12 on MicroBlaze doesn't support __symver__
# attribute. It's simplest and safest to use the
# generic version on that platform since then only
# the linker script is needed. The RHEL/CentOS 7
# compatibility symbols don't matter on MicroBlaze.
enable_symbol_versions=generic
;;
*-linux*)
case "$pic_mode-$enable_static" in
default-*)
# Use symvers if PIC is defined.
have_symbol_versions_linux=2
;;
*-no)
# Not building static library.
# Use symvers unconditionally.
have_symbol_versions_linux=1
;;
*)
AC_MSG_RESULT([])
AC_MSG_ERROR([
if test "x$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.
enable_symbol_versions=generic
;;
*-linux*)
enable_symbol_versions=linux
;;
*)
enable_symbol_versions=generic
;;
esac
fi
if test "x$enable_symbol_versions" = xlinux ; then
case "$pic_mode-$enable_static" in
default-*)
# Use symvers if PIC is defined.
have_symbol_versions_linux=2
;;
*-no)
# Not building static library.
# Use symvers unconditionally.
have_symbol_versions_linux=1
;;
*)
AC_MSG_RESULT([])
AC_MSG_ERROR([
On GNU/Linux, building both shared and static library at the same time
is not supported if --with-pic or --without-pic is used.
Use either --disable-shared or --disable-static to build one type
of library at a time. If both types are needed, build one at a time,
possibly picking only src/liblzma/.libs/liblzma.a from the static build.])
;;
esac
enable_symbol_versions=linux
AC_DEFINE_UNQUOTED([HAVE_SYMBOL_VERSIONS_LINUX],
[$have_symbol_versions_linux],
[Define to 1 to if GNU/Linux-specific details
are unconditionally wanted for symbol
versioning. Define to 2 to if these are wanted
only if also PIC is defined (allows building
both shared and static liblzma at the same
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
;;
esac
AC_DEFINE_UNQUOTED([HAVE_SYMBOL_VERSIONS_LINUX],
[$have_symbol_versions_linux],
[Define to 1 to if GNU/Linux-specific details
are unconditionally wanted for symbol
versioning. Define to 2 to if these are wanted
only if also PIC is defined (allows building
both shared and static liblzma at the same
time with Libtool if neither --with-pic nor
--without-pic is used). This define must be
used together with liblzma_linux.map.])
elif test "x$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