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| author | Lennart Poettering <lennart@poettering.net> | 2008-08-18 23:52:44 +0200 |
|---|---|---|
| committer | Lennart Poettering <lennart@poettering.net> | 2008-08-18 23:52:44 +0200 |
| commit | 3d2d6ca958719c03fa541dda48037501919a55de (patch) | |
| tree | c0e378f622f2e65b2bf5e622ae94bd6de03b4d6a /m4/tls.m4 | |
| parent | 46f0f9ed8bb2cda7c1f19b5d900e2954d7aa1f27 (diff) | |
| parent | 016fcd92d412cb453a062b69053bc49a742fff56 (diff) | |
Merge commit 'flameeyes/autoconf-2.62'
Diffstat (limited to 'm4/tls.m4')
| -rw-r--r-- | m4/tls.m4 | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/m4/tls.m4 b/m4/tls.m4 new file mode 100644 index 00000000..3808f06e --- /dev/null +++ b/m4/tls.m4 @@ -0,0 +1,17 @@ +AC_DEFUN([CC_CHECK_TLS], [ + AC_CACHE_CHECK([whether $CC knows __thread for Thread-Local Storage], + cc_cv_tls___thread, + [AC_COMPILE_IFELSE( + AC_LANG_PROGRAM( + [[static __thread int a = 6;]], + [[a = 5;]]), + [cc_cv_tls___thread=yes], + [cc_cv_tls___thread=no]) + ]) + + AS_IF([test "x$cc_cv_tls___thread" = "xyes"], + [AC_DEFINE([SUPPORT_TLS___THREAD], 1, + [Define this if the compiler supports __thread for Thread-Local Storage]) + $1], + [$2]) +]) |