Increase optimization level of Clang

[stockfish] / src / Makefile

diff --git a/src/Makefile b/src/Makefile
index 71aa7b30d195370738bcab3705f4385b7328b308..782971e938c1364494642aa17112f8c3fda1319c 100644 (file)
--- a/src/Makefile
+++ b/src/Makefile
@@ -270,7 +270,7 @@ ifeq ($(optimize),yes)
        endif
 
        ifeq ($(comp),clang)
-               CXXFLAGS += -O3
+               CXXFLAGS += -O4
 
                ifeq ($(os),osx)
                        ifeq ($(arch),i386)