https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68811
--- Comment #5 from Markus Trippelsdorf <trippels at gcc dot gnu.org> --- Thanks. I now get: lto1: internal compiler error: in lto_fixup_prevailing_decls, at lto/lto.c:2533 0x1017ce37 lto_fixup_prevailing_decls ../../gcc/gcc/lto/lto.c:2533 0x1017ce37 lto_fixup_decls ../../gcc/gcc/lto/lto.c:2657 0x1017ce37 read_cgraph_and_symbols ../../gcc/gcc/lto/lto.c:2890 0x1017ce37 lto_main() ../../gcc/gcc/lto/lto.c:3266 Please submit a full bug report, with preprocessed source if appropriate. Please include the complete backtrace with any bug report. See <http://gcc.gnu.org/bugs.html> for instructions. lto-wrapper: fatal error: ../../../gcc_test/usr/local/bin/c++ returned 1 exit status compilation terminated. /home/trippels/bin/ld: fatal error: lto-wrapper failed collect2: error: ld returned 1 exit status /home/trippels/gecko-dev/config/rules.mk:829: recipe for target 'libxul.so' failed