diff options
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. |