https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100269
Bug ID: 100269 Summary: [12 Regression] i686 biarch compiler fails for Darwin after r12-36. Product: gcc Version: 10.2.1 Status: UNCONFIRMED Severity: normal Priority: P3 Component: bootstrap Assignee: unassigned at gcc dot gnu.org Reporter: iains at gcc dot gnu.org Target Milestone: --- With the fix at r12-50-ga44895ce7ffbc26b4d765c40b5b346f8c9a9b762 applied, bootstrap still fails for a 32b host with a 64b multilib. $ ./gcc/xgcc -Bgcc -E -dM -m64 -xc /dev/null cc1: sorry, unimplemented: 64-bit mode not compiled in this is coming from i386-options.c:2050+ if ((TARGET_64BIT_P (opts->x_ix86_isa_flags) != 0) != ((opts->x_ix86_isa_flags & OPTION_MASK_ISA_64BIT) != 0)) sorry ("%i-bit mode not compiled in", (opts->x_ix86_isa_flags & OPTION_MASK_ISA_64BIT) ? 64 : 32); unfortunately, it is not obvious to me what fix I need to make here.