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Build: Let the users override the symbol versioning variant.

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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 was contributed under 0BSD but the author confirmed
that it is fine to backport it to the public domain branches. See
https://github.com/tukaani-project/xz/pull/90#issuecomment-2100185936
and the next two messages.)

(cherry picked from commit f56ed6fac6619b56b005878d3b5210e2f0d721c0)
This commit is contained in:
Sergey Kosukhin 2024-03-12 20:03:49 +01:00 committed by Lasse Collin
parent a8b3fb6d2f
commit ce3a9fa94d
1 changed files with 50 additions and 41 deletions
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21
configure.ac
View File

@ -714,6 +714,7 @@ elif test "x$enable_shared" = xno ; then
enable_symbol_versions=no
AC_MSG_RESULT([no (not building a shared library)])
else
if test "x$enable_symbol_versions" = xyes ; then
case "$host_cpu-$host_os" in
microblaze*)
# GCC 12 on MicroBlaze doesn't support __symver__
@ -724,6 +725,15 @@ else
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-$enable_static" in
default-*)
# Use symvers if PIC is defined.
@ -744,7 +754,6 @@ else
possibly picking only src/liblzma/.libs/liblzma.a from the static build.])
;;
esac
enable_symbol_versions=linux
AC_DEFINE_UNQUOTED([HAVE_SYMBOL_VERSIONS_LINUX],
[$have_symbol_versions_linux],
[Define to 1 to if GNU/Linux-specific details
@ -755,11 +764,11 @@ 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