Add CONFIG_WARNINGS_ARE_ERRORS and set it for qemu.

Remove all remaining warnings from qemu.

Signed-off-by: Myles Watson <mylesgw@gmail.com>
Acked-by: Ronald G. Minnich <rminnich@gmail.com>


git-svn-id: svn://svn.coreboot.org/coreboot/trunk@4939 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
diff --git a/src/include/smp/spinlock.h b/src/include/smp/spinlock.h
index aedd85b..1b0b4fd 100644
--- a/src/include/smp/spinlock.h
+++ b/src/include/smp/spinlock.h
@@ -5,15 +5,7 @@
 #include <arch/smp/spinlock.h>
 #else /* !CONFIG_SMP */
 
-/* Most GCC versions have a nasty bug with empty initializers */
-#if (__GNUC__ > 2) 
-typedef struct { } spinlock_t;
-#define SPIN_LOCK_UNLOCKED (spinlock_t) { }
-#else
-typedef struct { int gcc_is_buggy; } spinlock_t;
-#define SPIN_LOCK_UNLOCKED (spinlock_t) { 0 }
-#endif
-
+#define DECLARE_SPIN_LOCK(x)
 #define barrier()		do {} while(0)
 #define spin_is_locked(lock)	0
 #define spin_unlock_wait(lock)	do {} while(0)