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configure.ac: add -pthread to PTHREAD_LIBS 

As described inline - follow what's written in the manual and what works
for all platforms that Mesa supports.

We want to untangle things leaving only -pthread, yet that has a
potential of causing regressions. Thus we'll do it as a follow-up patch.

As a nice side-effect this resolves issues, where the system lacks
libpthread.so, yet the linker does not warn about it and we and up with
unresolved symbols.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=101071
Cc: mesa-stable@lists.freedesktop.org
Signed-off-by: Emil Velikov <emil.velikov@collabora.com>
Reviewed-by: Eric Engestrom <eric.engestrom@imgtec.com>
This commit is contained in:
Emil Velikov 2017-06-05 00:03:59 +01:00
parent fcbb93e860
commit e5aa806e5f
1 changed files with 5 additions and 0 deletions
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configure.ac
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@ -837,6 +837,11 @@ dnl is not valid for that platform.
if test "x$android" = xno; then
test -z "$PTHREAD_LIBS" && PTHREAD_LIBS="-lpthread"
fi
dnl According to the manual when using pthreads, one should add -pthread to
dnl both compile and link-time arguments.
dnl In practise that should be sufficient for all platforms, since any
dnl platforms build with GCC and Clang support the flag.
PTHREAD_LIBS="$PTHREAD_LIBS -pthread"
dnl pthread-stubs is mandatory on BSD platforms, due to the nature of the
dnl project. Even then there's a notable issue as described in the project README