tree 9cdac1a812c396aff8c8981fb10a66e6c91e338e
parent 457e05aee22417dc59ee4a51ead73e7be46f0e4b
author Hans Wennborg <hans@hanshq.net> 1378753489 +0000
committer Hans Wennborg <hans@hanshq.net> 1378753489 +0000

clang-cl: parse (but don't support) the /o flag

Apparently folks run into this (PR17097). The flag is not supported by
MSVC either, but we should parse it so we don't get confused when it occurs.

This changes the clang-cl output for "clang-cl /c /o foo.obj" from:

  clang-cl.exe: error: no such file or directory: '/o'
  clang-cl.exe: error: no such file or directory: 'foo.obj'

to:

  clang-cl.exe: warning: argument unused during compilation: '/o bajs.obj'

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@190323 91177308-0d34-0410-b5e6-96231b3b80d8