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| author | ian <ian@138bc75d-0d04-0410-961f-82ee72b054a4> | 2013-11-19 01:09:47 +0000 |
|---|---|---|
| committer | ian <ian@138bc75d-0d04-0410-961f-82ee72b054a4> | 2013-11-19 01:09:47 +0000 |
| commit | bcafb4a81d1fc8deefed6e6fa567d66417857c9a (patch) | |
| tree | a715cbe6fb809ff31f1487b709ea67a6f616cec5 /libbacktrace/configure.ac | |
| parent | 5dbddbd9cba08722841cff67404dd01e2654c099 (diff) | |
| download | gcc-bcafb4a81d1fc8deefed6e6fa567d66417857c9a.tar.gz | |
* configure.ac: Check for support of __atomic extensions.
* internal.h: Declare or #define atomic functions for use in
backtrace code.
* atomic.c: New file.
* dwarf.c (dwarf_lookup_pc): Use atomic functions.
(dwarf_fileline, backtrace_dwarf_add): Likewise.
* elf.c (elf_add_syminfo_data, elf_syminfo): Likewise.
(backtrace_initialize): Likewise.
* fileline.c (fileline_initialize): Likewise.
* Makefile.am (libbacktrace_la_SOURCES): Add atomic.c.
* configure, config.h.in, Makefile.in: Rebuild.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@204994 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'libbacktrace/configure.ac')
| -rw-r--r-- | libbacktrace/configure.ac | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/libbacktrace/configure.ac b/libbacktrace/configure.ac index 48c86203837..f97afbc8b74 100644 --- a/libbacktrace/configure.ac +++ b/libbacktrace/configure.ac @@ -194,6 +194,24 @@ if test "$libbacktrace_cv_sys_sync" = "yes"; then fi AC_SUBST(BACKTRACE_SUPPORTS_THREADS) +# Test for __atomic support. +AC_CACHE_CHECK([__atomic extensions], +[libbacktrace_cv_sys_atomic], +[if test -n "${with_target_subdir}"; then + libbacktrace_cv_sys_atomic=yes + else + AC_LINK_IFELSE( + [AC_LANG_PROGRAM([int i;], + [__atomic_load_n (&i, __ATOMIC_ACQUIRE); + __atomic_store_n (&i, 1, __ATOMIC_RELEASE);])], + [libbacktrace_cv_sys_atomic=yes], + [libbacktrace_cv_sys_atomic=no]) + fi]) +if test "$libbacktrace_cv_sys_atomic" = "yes"; then + AC_DEFINE([HAVE_ATOMIC_FUNCTIONS], 1, + [Define to 1 if you have the __atomic functions]) +fi + # The library needs to be able to read the executable itself. Compile # a file to determine the executable format. The awk script # filetype.awk prints out the file type. |