https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66521
--- Comment #16 from Eric Gallager <egall at gwmail dot gwu.edu> --- Created attachment 36272 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=36272&action=edit assembly that darwin 9 assembler rejects Here's a snippet from the attached file for some of the lines around the one in the error message from the previous comment (for context): LHOTE93: .private_extern __ZN4_VTVIN9__gnu_cxx24__concurrence_wait_errorEE12__vtable_mapE .no_dead_strip __ZN4_VTVIN9__gnu_cxx24__concurrence_wait_errorEE12__vtable_mapE .globl __ZN4_VTVIN9__gnu_cxx24__concurrence_wait_errorEE12__vtable_mapE .weak_definition __ZN4_VTVIN9__gnu_cxx24__concurrence_wait_errorEE12__vtable_mapE .align 2 __ZN4_VTVIN9__gnu_cxx24__concurrence_wait_errorEE12__vtable_mapE: .space 4 .private_extern __ZN4_VTVIN9__gnu_cxx29__concurrence_broadcast_errorEE12__vtable_mapE .no_dead_strip __ZN4_VTVIN9__gnu_cxx29__concurrence_broadcast_errorEE12__vtable_mapE .globl __ZN4_VTVIN9__gnu_cxx29__concurrence_broadcast_errorEE12__vtable_mapE .weak_definition __ZN4_VTVIN9__gnu_cxx29__concurrence_broadcast_errorEE12__vtable_mapE .align 2