https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87612
Bug ID: 87612
Summary: Bad diagnostic for conflicting mcpu and march options
on aarch64
Product: gcc
Version: unknown
Status: UNCONFIRMED
Keywords: diagnostic
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: ktkachov at gcc dot gnu.org
Target Milestone: ---
Target: aarch64
Giving conflicting -mcpu and -march options on aarch64 results in a useful
warning. However, it can be misleading:
aarch64-none-elf-gcc -S -O3 -march=armv8-a+sve -mcpu=cortex-a76 foo.c
cc1: warning: switch -mcpu=armv8.2-a conflicts with -march=armv8-a switch
1. The -mcpu part wrongly reports the architecture of the CPU rather than the
CPU name itself.
2. The -march part does not print the extensions added, like +sve
This should be simple enough to fix in aarch64_override_options in
config/aarch64/aarch64.c
