dnl Check whether the target supports TLS.
AC_DEFUN([GCC_CHECK_TLS], [
- GCC_ENABLE(tls, yes, [Use thread-local storage])
+ GCC_ENABLE(tls, yes, [], [Use thread-local storage])
AC_CACHE_CHECK([whether the target supports thread-local storage],
have_tls, [
AC_RUN_IFELSE([__thread int a; int b; int main() { return a = b; }],
[dnl If the test case passed with dynamic linking, try again with
- dnl static linking. This fails at least with some older Red Hat
- dnl releases.
+ dnl static linking, but only if static linking is supported (not
+ dnl on Solaris 10). This fails with some older Red Hat releases.
save_LDFLAGS="$LDFLAGS"
LDFLAGS="-static $LDFLAGS"
- AC_RUN_IFELSE([__thread int a; int b; int main() { return a = b; }],
- [have_tls=yes], [have_tls=no], [])
+ AC_LINK_IFELSE([int main() { return 0; }],
+ AC_RUN_IFELSE([__thread int a; int b; int main() { return a = b; }],
+ [have_tls=yes], [have_tls=no],[]),
+ [have_tls=yes])
LDFLAGS="$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,