* tls.m4 (GCC_CHECK_TLS): Fall back to a link test.

diff --git a/config/ChangeLog b/config/ChangeLog
index 57c31f4..fda6f95 100644 (file)
--- a/config/ChangeLog
+++ b/config/ChangeLog
@@ -1,3 +1,7 @@
+2006-11-13  Daniel Jacobowitz  <dan@codesourcery.com>
+
+       * tls.m4 (GCC_CHECK_TLS): Fall back to a link test.
+
 2006-10-14  Geoffrey Keating  <geoffk@apple.com>
 
        * multi.m4: New file, from automake version 2 branch.

diff --git a/config/tls.m4 b/config/tls.m4
index b7a0730..b66b6d7 100644 (file)
--- a/config/tls.m4
+++ b/config/tls.m4
@@ -13,7 +13,8 @@ AC_DEFUN([GCC_CHECK_TLS], [
                    [have_tls=yes], [have_tls=no], [])
       LDFLAGS="$save_LDFLAGS"],
       [have_tls=no],
-      [AC_COMPILE_IFELSE([__thread int foo;], [have_tls=yes], [have_tls=no])]
+      [AC_LINK_IFELSE([__thread int a; int b; int main() { return a = b; }],
+       [have_tls=yes], [have_tls=no])]
     )])
   if test "$enable_tls $have_tls" = "yes yes"; then
     AC_DEFINE(HAVE_TLS, 1,