[Bug target/78077] gcc 6.2.0 fails to link temacs from emacs-25.1 using the Xcode 8 linker

[howarth.at.gcc at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78077

--- Comment #4 from Jack Howarth <howarth.at.gcc at gmail dot com> ---
The Apple developers think this is gcc bug producing malformatted input to the
linker. From macho_relocatable_file.cpp, we are triggering the linker check...

        #ifndef NDEBUG
                // scan for FDEs claming the same function
                for(uint32_t i=1; i < cfiStartsArrayCount; ++i) {
                        assert( cfiStartsArray[i] != cfiStartsArray[i-1] );
                }
        #endif