1 files changed, 8 insertions, 0 deletions
diff --git a/config.h b/config.h
index 66f6f17..402b963 100644
--- a/config.h
+++ b/config.h
@@ -46,6 +46,14 @@
 /* Do we know about type mode_t? */
 #undef HAVE_MODE_T
 
+/* 
+ * Define if GCC has atomic builtins, i.e. __sync_* intrinsics
+ * __sync_lock_* is implemented in mingw32 gcc 4.5.2 at least
+ * so this define does not turn those on or off. If you get an
+ * error from __sync_lock* then consider upgrading your gcc.
+ */
+#undef HAVE_GCC_ATOMIC_BUILTINS
+
 /* Define if you have the timespec struct */
 #undef HAVE_STRUCT_TIMESPEC