GCC only tests

regression/ansi-c/Struct_Padding6/main.c

@@ -26,7 +26,10 @@ struct evtchn_status {
 
 int main()
 {
+  #ifdef __GNUC__
   STATIC_ASSERT(__builtin_offsetof(struct evtchn_status,u.interdomain.port)==20);
+  #endif
+
   STATIC_ASSERT(sizeof(struct evtchn_status)==28);
   return 0;
 };

regression/ansi-c/_Noreturn1/main.c

@@ -1,4 +1,6 @@
+#ifdef __GNUC__
 extern _Noreturn void foo();
+#endif
 
 int main()
 {

regression/ansi-c/gcc_builtins5/main.c

@@ -1,3 +1,5 @@
+#ifdef __GNUC__
+
 typedef unsigned long int uintptr_t;
 typedef unsigned long int uint64_t;
 typedef long int __intptr_t;
@@ -54,3 +56,11 @@ int main()
               ) 0))) (stack_chk_guard))),
   "i" (__builtin_offsetof (struct pthread, header.stack_guard)));
 }
+
+#else
+
+int main()
+{
+}
+
+#endif