######### probably require gcc.
ifeq (, $(findstring $(OSARCH) , Darwin SunOS ))
-ifeq (, $(findstring $(PROC) , x86_64 amd64 ultrasparc sparc64 arm armv5b armeb hppa2.0 ppc powerpc ppc64 ia64 s390 bfin mipsel mips))
-ifeq (, $(findstring $(shell uname -m) , ppc ppc64 alpha armv4l s390 ))
-OPTIMIZE+=-march=$(PROC)
-endif
-endif
+ ifeq (, $(findstring $(PROC) , x86_64 amd64 ultrasparc sparc64 arm armv5b armeb hppa2.0 ppc powerpc ppc64 ia64 s390 bfin mipsel mips))
+ ifeq (, $(findstring $(shell uname -m) , ppc ppc64 alpha armv4l s390 ))
+ OPTIMIZE+=-march=$(PROC)
+ endif
+ endif
+else
+ ifneq (,$(findstring $(OSARCH),Darwin))
+ ifeq ($(shell /usr/bin/sw_vers -productVersion | cut -c1-4),10.6)
+ # Snow Leopard reports i386, even though it's really x86_64
+ OPTIMIZE+=-mtune=native
+ endif
+ endif
endif
#The problem with sparc is the best stuff is in newer versions of gcc (post 3.0) only.