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[Bug target/71767] Endless stream of warnings when using GCC with -Wa,-q and Clang Integrated Assembler
- From: "howarth.at.gcc at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Mon, 24 Oct 2016 21:07:59 +0000
- Subject: [Bug target/71767] Endless stream of warnings when using GCC with -Wa,-q and Clang Integrated Assembler
- Auto-submitted: auto-generated
- References: <bug-71767-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71767
--- Comment #43 from Jack Howarth <howarth.at.gcc at gmail dot com> ---
(In reply to Eric Gallager from comment #33)
> I'm not sure if this is due to the patches from this bug report, or if it's
> due to some other change made to GCC recently, but my fork of Emacs now
> fails to build with LTO due to a bunch of undefined local symbols:
>
This issue appears to be PR57438 because passing
-D__builtin_unreachable=__builtin_trap to the build on OS X 10.11 allows emac
25.1 to build against the Xcode 8.1 GM linker using stock gcc 6.2.0 compiler
with...
$ ../configure --enable-link-time-optimization --without-ns
CC=/sw/bin/gcc-fsf-6 CXX=/sw/bin/g++-fsf-6
CPPFLAGS="-D__builtin_unreachable=__builtin_trap -I/sw/include"
LDFLAGS="-L/sw/lib"