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| author | Diego 'Flameeyes' Pettenò <flameeyes@gmail.com> | 2008-08-08 14:03:54 +0200 |
|---|---|---|
| committer | Diego 'Flameeyes' Pettenò <flameeyes@gmail.com> | 2008-08-08 15:09:38 +0200 |
| commit | daf3e8b97d09d85d51eac34b9d5acf4545d03a2d (patch) | |
| tree | 80f422f11a8764611eb311b12504e00130be4484 /m4 | |
| parent | 81969a73a494a36356e764cf3576aa48c101bffb (diff) | |
| download | pulseaudio-daf3e8b97d09d85d51eac34b9d5acf4545d03a2d.tar.gz | |
Create a new macro for checking compiler support for TLS.
Create a new macro that can be shared between projects to check for
__thread support by the compiler. This macro might come useful for
xine-lib too so I want to keep it separate for easier importing it
over.
Name the defined macro SUPPORT_TLS___THREAD to follow the same style
as the checks from attributes.m4.
Diffstat (limited to '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 000000000..3808f06ed --- /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]) +]) |