use gcc sync builtins for memory counter when possible

[redis.git] / src / config.h

diff --git a/src/config.h b/src/config.h
index 323a3ddd1f43b00678aae3a4e87c93b0edc9a117..2bf0f93403198876226d92f9ed5f3a982c215b75 100644 (file)
--- a/src/config.h
+++ b/src/config.h
@@ -96,4 +96,13 @@
 #error "Undefined or invalid BYTE_ORDER"
 #endif
 
+#if (__i386 || __amd64) && __GNUC__
+    #include <features.h>
+
+    #if __GNUC_PREREQ(4,1)
+        #define HAVE_ATOMIC
+    #endif
+#endif
+
+
 #endif