[PATCH][committed] aarch64: Give hint for -mcpu options that match -march instead

[Kyrylo Tkachov via Gcc-patches]

Hi all,

We should redirect users of the erroneous -mcpu=armv8.2-a to use -march instead.
There is an equivalent hint for -march used with a CPU name.

Bootstrapped and tested on aarch64-none-linux-gnu.
Pushing to trunk.

Thanks,
Kyrill

gcc/ChangeLog:

        * config/aarch64/aarch64.cc (aarch64_validate_mcpu): Add hint to use 
-march
        if the argument matches that.

gcc/testsuite/ChangeLog:

        * gcc.target/aarch64/spellcheck_11.c: New test.

arch-hint.patch
Description: arch-hint.patch