https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100067
--- Comment #1 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Richard Earnshaw <rearn...@gcc.gnu.org>: https://gcc.gnu.org/g:d1e4368ddb76a92c44f824c8e4ca1a3de8149342 commit r11-8168-gd1e4368ddb76a92c44f824c8e4ca1a3de8149342 Author: Richard Earnshaw <rearn...@arm.com> Date: Wed Apr 14 10:56:36 2021 +0100 arm: fix warning when -mcpu=neoverse-n1 is used with -mfpu=neon [PR100067] If the compiler is configured with --with-fpu=<!auto> (or invoked with, say, -mfpu=neon), then specifying -mcpu=neoverse-n1 can lead to an unexpected warning: cc1: warning: switch â-mcpu=neoverse-n1â conflicts with â-march=armv8.2-aâ switch The fix for this is to correctly remove all the feature bits relating to simd/fp units when -mfpu is used, not just those bits that form part of the -mfpu specification (which is a subset). gcc: PR target/100067 * config/arm/arm.c (arm_configure_build_target): Strip isa_all_fpbits from the isa_delta when -mfpu has been used. (arm_options_perform_arch_sanity_checks): It's the architecture that lacks an FPU not the processor.
