[all-commits] [llvm/llvm-project] 0792ef: [Driver] Verify -mrecord-mcount in Driver, instead...

[Fangrui Song via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 0792ef72564071f21b727d0de3a14d565950290f
      https://github.com/llvm/llvm-project/commit/0792ef72564071f21b727d0de3a14d565950290f
  Author: Fangrui Song <maskray at google.com>
  Date:   2019-12-21 (Sat, 21 Dec 2019)

  Changed paths:
    M clang/lib/CodeGen/CodeGenFunction.cpp
    M clang/lib/Driver/ToolChains/Clang.cpp
    M clang/test/CodeGen/mnop-mcount.c
    M clang/test/CodeGen/mrecord-mcount.c
    A clang/test/Driver/mcount.c

  Log Message:
  -----------
  [Driver] Verify -mrecord-mcount in Driver, instead of CodeGen after D71627

GCC's x86 and s390 ports support -mrecord-mcount. Other ports reject the
option.

  aarch64-linux-gnu-gcc: error: unrecognized command line option ‘-mrecord-mcount’

Allowing this option can cause failures when building Linux kernel for
aarch64, powerpc64, etc, which will think the feature is available if
the clang command returns 0.