[PATCH] D28365: [Driver] Updated for Visual Studio 2017

[Hamza Sood via Phabricator via cfe-commits]

hamzasood created this revision.
hamzasood added reviewers: rnk, ruiu, hans.
hamzasood added a subscriber: cfe-commits.

The patch updates the MSVC ToolChain for the changes made in Visual Studio 2017 (https://blogs.msdn.microsoft.com/vcblog/2016/10/07/compiler-tools-layout-in-visual-studio-15/).
Other notable changes:

- Path handling code has been centralised to make potential future changes less painful.
- A compiler error is emitted if the driver is unable to locate a usable MSVC toolchain. (Previously it'd fail with a cryptic error such as "link.exe is not executable")
- Support for the new Setup Config Server <https://blogs.msdn.microsoft.com/heaths/2016/09/15/changes-to-visual-studio-15-setup/> API has been added, albeit block commented out with a preprocessor conditional. This can probably be re-evaluated when the API is officially released (it's currently at the RC stage), but it's left in to make it easy for anyone familiar with the API to give it a go with Clang.

Patch by Hamza Sood.


https://reviews.llvm.org/D28365

Files:
  include/clang/Basic/DiagnosticDriverKinds.td
  lib/Driver/MSVCToolChain.cpp
  lib/Driver/ToolChains.h
  lib/Driver/Tools.cpp

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