[all-commits] [llvm/llvm-project] 2b69eb: [clang-tools-extra] Reuse llvm_config.use_clang() ...

[Sam McCall via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 2b69eb4a7d1d1e6829081aa677cd52ad8eef2d5b
      https://github.com/llvm/llvm-project/commit/2b69eb4a7d1d1e6829081aa677cd52ad8eef2d5b
  Author: Sam McCall <sam.mccall at gmail.com>
  Date:   2022-03-15 (Tue, 15 Mar 2022)

  Changed paths:
    M clang-tools-extra/test/lit.cfg.py
    M clang-tools-extra/test/lit.site.cfg.py.in

  Log Message:
  -----------
  [clang-tools-extra] Reuse llvm_config.use_clang() to set up test environment

This replaces a bunch of duplicate logic to set up environment variables
and a few substitutions.

It does a little more than we were doing previously:
 - searching for clang and setting up substitutions for it
 - setting up some substitutions for target triples, which are
   potentially useful but not actually used

clangd has been happily using this for its tests for a while.

Differential Revision: https://reviews.llvm.org/D121422