tst-printf-bz18872.sh: stdio: Use __attribute__ ((optnone)) for Clang

Use

__attribute__ ((optnone))

instead of

__attribute__ ((optimize ("-O0")))

to disable optimization for Clang.

Co-Authored-By: H.J. Lu <hjl.tools@gmail.com>
Reviewed-by: Sam James <sam@gentoo.org>

diff --git a/stdio-common/tst-printf-bz18872.sh b/stdio-common/tst-printf-bz18872.sh
index 3b283f49a64f2b16eff9b6fbca62c5136ccf69ba..ade4b61f859015e986814390d901ef7fae15498a 100644 (file)
--- a/stdio-common/tst-printf-bz18872.sh
+++ b/stdio-common/tst-printf-bz18872.sh
@@ -31,7 +31,11 @@ cat <<'EOF'
   Compile do_test without optimization: GCC 4.9/5.0/6.0 takes a long time
   to build this source. https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67396  */
 
+#ifdef __clang__
+__attribute__ ((optnone))
+#else
 __attribute__ ((optimize ("-O0")))
+#endif
 int do_test (void)
 {
     mtrace ();