Isn't there a --cflags-only-I or something along those lines? Sending from a mobile, pardon the brevity. ~ C.
On Dec 6, 2010 9:42 AM, "Dan Nicholson" <dbn.li...@gmail.com> wrote: > On Mon, Dec 6, 2010 at 9:15 AM, Brian Paul <bri...@vmware.com> wrote: >> On 12/05/2010 02:06 AM, Bob Gleitsmann wrote: >>> >>> Hello, >>> >>> Can someone explain the value of including this in >>> mesa/src/gallium/Makefile.template: >>> >>> ifeq ($(MESA_LLVM),1) >>> LIBRARY_DEFINES += $(LLVM_CFLAGS) >>> endif >>> >>> ? >>> This effectively adds the LLVM cflags to gcc compiles if LLVM is enabled. >>> One >>> side-effect of this is to include -O3 optimization no matter what, making >>> debugging very difficult. Removing it seems to have no catastrophic >>> effects (or >>> even detectable ones). >>> But maybe I am missing something. >> >> We need some of the LLVM C flags to get the -I path for headers, for >> example. >> >> I think we should use llvm-config --cppflags instead of --cflags. >> >> If you're using autoconf, try changing this line: >> >> LLVM_CFLAGS=`$LLVM_CONFIG --cflags` >> >> in configure.ac to use --cppflags instead. Does that help? > > I think the question is, what else is in llvm-config --cflags? If all > that's needed is the include paths, then --cppflags would be > sufficient. However, if there are macro definitions or compiler flags > (e.g. -fomit-frame-pointer) in --cflags that are needed to properly > use llvm, then I guess you need --cflags. This is really a bug in > llvm, but the last time someone here tried to bring it up to the llvm > people, it was dismissed. Here's that bug: > > http://llvm.org/bugs/show_bug.cgi?id=8220 > > There's some more in the mesa archives, but I can't find the thread > now. Sadly, that bug became a discussion about pkg-config which was > not what was intended. > > -- > Dan > _______________________________________________ > mesa-dev mailing list > mesa-dev@lists.freedesktop.org > http://lists.freedesktop.org/mailman/listinfo/mesa-dev
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