From 2f0a214a6202516b4dda2bb22b6b3ac20e465d6d Mon Sep 17 00:00:00 2001 From: Anton Khirnov Date: Wed, 19 Jan 2022 12:50:41 +0100 Subject: configure: link to libatomic when it's present C11 atomics in some configurations (e.g. 64bit operations on ppc64 with GCC) require linking to libatomic. Fixes #9275 --- configure | 25 ++++++++++++++++--------- 1 file changed, 16 insertions(+), 9 deletions(-) diff --git a/configure b/configure index 52ef214b73..94f513288a 100755 --- a/configure +++ b/configure @@ -3795,20 +3795,20 @@ cws2fws_extralibs="zlib_extralibs" # libraries, in any order avcodec_deps="avutil" -avcodec_suggest="libm" +avcodec_suggest="libm stdatomic" avdevice_deps="avformat avcodec avutil" -avdevice_suggest="libm" +avdevice_suggest="libm stdatomic" avfilter_deps="avutil" -avfilter_suggest="libm" +avfilter_suggest="libm stdatomic" avformat_deps="avcodec avutil" -avformat_suggest="libm network zlib" -avutil_suggest="clock_gettime ffnvcodec libm libdrm libmfx opencl user32 vaapi vulkan videotoolbox corefoundation corevideo coremedia bcrypt" +avformat_suggest="libm network zlib stdatomic" +avutil_suggest="clock_gettime ffnvcodec libm libdrm libmfx opencl user32 vaapi vulkan videotoolbox corefoundation corevideo coremedia bcrypt stdatomic" postproc_deps="avutil gpl" -postproc_suggest="libm" +postproc_suggest="libm stdatomic" swresample_deps="avutil" -swresample_suggest="libm libsoxr" +swresample_suggest="libm libsoxr stdatomic" swscale_deps="avutil" -swscale_suggest="libm" +swscale_suggest="libm stdatomic" avcodec_extralibs="pthreads_extralibs iconv_extralibs dxva2_extralibs" avfilter_extralibs="pthreads_extralibs" @@ -6325,7 +6325,14 @@ check_headers asm/types.h # it seems there are versions of clang in some distros that try to use the # gcc headers, which explodes for stdatomic # so we also check that atomics actually work here -check_builtin stdatomic stdatomic.h "atomic_int foo, bar = ATOMIC_VAR_INIT(-1); atomic_store(&foo, 0); foo += bar" +# +# some configurations also require linking to libatomic, so try +# both with -latomic and without +for LATOMIC in "-latomic" ""; do + check_builtin stdatomic stdatomic.h \ + "atomic_int foo, bar = ATOMIC_VAR_INIT(-1); atomic_store(&foo, 0); foo += bar" \ + $LATOMIC && eval stdatomic_extralibs="\$LATOMIC" && break +done check_lib advapi32 "windows.h" RegCloseKey -ladvapi32 check_lib bcrypt "windows.h bcrypt.h" BCryptGenRandom -lbcrypt && -- cgit v1.2.3