X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2FMakefile;h=3963e5589d6fdfc85a87dd230ff0d3ef048830fc;hp=d5a72b66f5a5a829c98ca7270687e26a1a906c06;hb=8d65fcc0f3b26beb19cc838ff2ad0c78ac289120;hpb=2643f1552fca823a2922c124b49f1fa04aa5d970

diff --git a/src/Makefile b/src/Makefile
index d5a72b66..3963e558 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -25,11 +25,8 @@ EXE = stockfish
 ### ==========================================================================
 ### Compiler speed switches for both GCC and ICC. These settings are generally
 ### fast on a broad range of systems, but may be changed experimentally
-###
-### NOTE: Some versions of gcc miscompile value.h with -O2 or -O3, this is the
-### safe setup, try changing to -O3 or -O2 and verify it works for you.
 ### ==========================================================================
-GCCFLAGS = -O1 -msse
+GCCFLAGS = -O3 -msse
 ICCFLAGS = -fast -msse
 ICCFLAGS-OSX = -fast -mdynamic-no-pic
 
@@ -83,6 +80,7 @@ help:
 	@echo "Makefile options:"
 	@echo ""
 	@echo "make                >  Default: Compiler = g++"
+	@echo "make gcc-popcnt     >  Compiler = g++ + popcnt-support"
 	@echo "make icc            >  Compiler = icpc"
 	@echo "make icc-profile    >  Compiler = icpc + automatic pgo-build"
 	@echo "make icc-profile-popcnt >  Compiler = icpc + automatic pgo-build + popcnt-support"
@@ -111,6 +109,13 @@ gcc:
 	CXXFLAGS="$(GCCFLAGS)" \
 	all
 
+gcc-popcnt:
+	$(MAKE) \
+	CXX='g++' \
+	CXXFLAGS="$(GCCFLAGS) -DUSE_POPCNT" \
+	all
+
+
 icc:
 	$(MAKE) \
 	CXX='icpc' \