https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71767
--- Comment #41 from Jack Howarth <howarth.at.gcc at gmail dot com> --- (In reply to Jack Howarth from comment #40) > (In reply to Jack Howarth from comment #39) > > (In reply to Eric Gallager from comment #38) > > > > Your issue of undefined symbols under FSF gcc is orthogonal to the problem > > discussed in this PR. As I mentioned before, the same issue is observed for > > a build of stock emacs 25.1 with '-O0 -flto' using a stock (unpatched) gcc > > 6.2.0 compiler. You should open a separate PR for that bug. > > Your bug might be reproducible on linux using a gcc build that doesn't have > build_lto_plugin set by configure so the same LTO code path is used as on > darwin. FYI, I was able to reproduce the same bug on x86_64 linux when building emacs 25.1 with -flto using a build of gcc 6.2.0 with configure manually edited to set build_lto_plugin=no on linux. CCLD temacs /tmp/cc7ZBmmQ.ltrans0.ltrans.o:(.rodata+0x135a0): undefined reference to `.L1' ... /tmp/cc7ZBmmQ.ltrans0.ltrans.o:(.rodata+0x13bc8): more undefined references to `.L174' follow collect2: fatal error: ld returned 1 exit status
