diff options
Diffstat (limited to 'config/tls.m4')
| -rw-r--r-- | config/tls.m4 | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/config/tls.m4 b/config/tls.m4 index c8f3ff0a3..69cf6d4f9 100644 --- a/config/tls.m4 +++ b/config/tls.m4 @@ -73,3 +73,16 @@ AC_DEFUN([GCC_CHECK_TLS], [ AC_DEFINE(HAVE_TLS, 1, [Define to 1 if the target supports thread-local storage.]) fi]) + +dnl Check whether the target assembler supports TLS. +AC_DEFUN([GCC_CHECK_CC_TLS], [ + GCC_ENABLE(tls, yes, [], [Use thread-local storage]) + AC_CACHE_CHECK([whether the target asssembler upports thread-local storage], + have_cc_tls, [ + AC_COMPILE_IFELSE([__thread int a; int b; int main() { return a = b; }], + [have_cc_tls=yes], [have_cc_tls=no])] + )]) + if test "$enable_tls $have_cc_tls" = "yes yes"; then + AC_DEFINE(HAVE_CC_TLS, 1, + [Define to 1 if the target assembler supports thread-local storage.]) + fi]) |