https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83531
--- Comment #3 from Iain Sandoe <iains at gcc dot gnu.org> --- On current 10.136, with Xcode 9.4 command line tools, and/or GCC 7.4 (with a new enough linker to support v2 tbd files), this seems to work for me: clang bootstrap (trunk) https://gcc.gnu.org/ml/gcc-testresults/2019-01/msg01458.html GCC: bootstrap: (trunk) https://gcc.gnu.org/ml/gcc-testresults/2019-01/msg00316.html (8x) https://gcc.gnu.org/ml/gcc-testresults/2019-01/msg00754.html (7x) https://gcc.gnu.org/ml/gcc-testresults/2019-01/msg00762.html AFAICT, Darwin 9 through 18 all bootstrap [with the proviso that Apple-4.2.1 no longer works on the earlier platforms, for trunk (it produces a compiler that fails its self-tests with a memory-management problem), I've been using GCC-5 as the bootstrap on Darwin9 and 10. Is this problem still reproducible to anyone? If not can we close it? Apropos comment #2, yes we have some header hassles; we need to work through the test cases fixing them up - patches welcome! Anyway - let's separate the test-case headers issue from this one.