r351316 - Reapply [Tooling] Make clang-tool find libc++ dir on mac when running on a file without compilation database.

[Sam McCall via cfe-commits]

+Ilya who understands the test better...

Some are fixed by r351334 with -target, Ilya could you take a look at
windows? Otherwise we could use REQUIRES...

On Wed, Jan 16, 2019, 15:16 Jeremy Morse <jeremy.morse.llvm at gmail.com wrote:

> Hi Sam,
>
> Unfortunately this trips up a variety of buildbots:
>
>     http://lab.llvm.org:8011/builders/clang-hexagon-elf/builds/22376
>     http://lab.llvm.org:8011/builders/clang-x64-ninja-win7/builds/15053
>     http://lab.llvm.org:8011/builders/clang-hexagon-elf/builds/22376
>     http://lab.llvm.org:8011/builders/clang-x64-windows-msvc/builds/3401
>
> http://lab.llvm.org:8011/builders/lldb-amd64-ninja-netbsd8/builds/18177
>
> http://lab.llvm.org:8011/builders/llvm-clang-lld-x86_64-scei-ps4-windows10pro-fast/builds/22919
>
> For the Windows machines at least, I don't believe lit can cope with
> replicating shell subprocesses and thus the use of $(which...). (I could be
> wrong there, but it matches up with the error messages).
>
> "clang-check-mac-libcxx-fixed-compilation-db.cpp" sounds like it's
> mac-specific, maybe only "REQUIRES: system-darwin" is needed?
>
> --
> Thanks,
> Jeremy
>
>
>>
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