----- Original Message ----- > > On May 29, 2012, at 10:55 AM, Andrew Haley wrote: > > > On 05/29/2012 06:12 PM, Kelly O'Hair wrote: > >> > >> You should be able to do something like: > >> > >> # Turn off aliasing with GCC for ExtensionSubtables.cpp > >> ifeq ($(PLATFORM), linux) > >> CXXFLAGS += $(CXXFLAGS_$(@F)) > >> CC_NEWER_THAN_43 := \ > >> $(shell $(EXPR) $(CC_MAJORVER) \> 4 \| \ > >> \( $(CC_MAJORVER) = 4 \& $(CC_MINORVER) \> 3 \) ) > >> ifeq ($(CC_NEWER_THAN_43),1) > >> CXXFLAGS_ExtensionSubtables.o = -fno-strict-aliasing > >> endif > >> endif > > > > No way: -fno-strict-aliasing has been in GCC for a very long time, > > and it's > > certainly in 4.0. You'll need it in 4.3. > > In which case, I'd rather not add this kind of ugly make logic. > Although I'm not sure > if we have anyone building with really old GCC versions anymore, or > even if we have > a sanity check that says "FATAL: Please don;t build with older GCC > versions than 4.3" :^( > > I was just thinking how to handle new GCC options in Makefiles, > didn't investigate GCC versions. >
It's not only not new to 4.4, you already use it in make/common/Defs-linux.gmk: # # Misc compiler options # ifneq ($(ARCH),ppc) CFLAGS_COMMON = -fno-strict-aliasing endif I'll push to 2D. > -kto > > > > > Andrew. > > -- Andrew :) Free Java Software Engineer Red Hat, Inc. (http://www.redhat.com) PGP Key: 248BDC07 (https://keys.indymedia.org/) Fingerprint = EC5A 1F5E C0AD 1D15 8F1F 8F91 3B96 A578 248B DC07
