my_atomic-t.c:

  gcc bug workaround

unittest/mysys/my_atomic-t.c

@@ -18,6 +18,13 @@
 #include <my_atomic.h>
 #include <tap.h>
 
+/* at least gcc 3.4.5 and 3.4.6 (but not 3.2.3) on RHEL */
+#if __GNUC__ == 3 && __GNUC_MINOR__ == 4
+#define GCC_BUG_WORKAROUND volatile
+#else
+#define GCC_BUG_WORKAROUND
+#endif
+
 int32 a32,b32,c32;
 my_atomic_rwlock_t rwl;
 
@@ -30,7 +37,7 @@ int N;
 pthread_handler_t test_atomic_add_handler(void *arg)
 {
   int    m=*(int *)arg;
-  int32 x;
+  GCC_BUG_WORKAROUND int32 x;
   for (x=((int)((long)(&m))); m ; m--)
   {
     x=x*m+0x87654321;
@@ -102,7 +109,7 @@ pthread_handler_t test_atomic_swap_handler(void *arg)
 pthread_handler_t test_atomic_cas_handler(void *arg)
 {
   int    m=*(int *)arg, ok;
-  int32 x,y;
+  GCC_BUG_WORKAROUND int32 x,y;
   for (x=((int)((long)(&m))); m ; m--)
   {
     my_atomic_rwlock_wrlock(&rwl);