[all-commits] [llvm/llvm-project] 7370b9: [Driver] Reject -march= for ppc

[Fangrui Song via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 7370b9c8ea0049f103daae0126861ba4f6ff6f4a
      https://github.com/llvm/llvm-project/commit/7370b9c8ea0049f103daae0126861ba4f6ff6f4a
  Author: Fangrui Song <i at maskray.me>
  Date:   2023-03-06 (Mon, 06 Mar 2023)

  Changed paths:
    M clang/lib/Driver/ToolChains/Arch/PPC.cpp
    M clang/lib/Driver/ToolChains/Arch/PPC.h
    M clang/lib/Driver/ToolChains/CommonArgs.cpp
    M clang/test/Driver/ppc-cpus.c

  Log Message:
  -----------
  [Driver] Reject -march= for ppc

Clang -march= for ppc triples currently leads to an
-Wunused-command-line-argument warning but GCC rejects -march=.

    error: unrecognized command-line option ‘-march=xxx’

Let's reject -march= as well similar to the Sparc change D130273.

Close https://github.com/llvm/llvm-project/issues/57587

Reviewed By: #powerpc, nemanjai

Differential Revision: https://reviews.llvm.org/D145141