[all-commits] [llvm/llvm-project] 956f8c: [Driver] Override default location of config files

[Serge Pavlov via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 956f8c0e1028edd65f68c4b386224d4ccb58c5b6
      https://github.com/llvm/llvm-project/commit/956f8c0e1028edd65f68c4b386224d4ccb58c5b6
  Author: Serge Pavlov <sepavloff at gmail.com>
  Date:   2022-08-17 (Wed, 17 Aug 2022)

  Changed paths:
    M clang/lib/Driver/Driver.cpp

  Log Message:
  -----------
  [Driver] Override default location of config files

If directory for config files was specified in project configuration
using parameters CLANG_CONFIG_FILE_SYSTEM_DIR or CLANG_CONFIG_FILE_USER_DIR,
it was not overriden by command-line option `--config-system-dir=` or
`--config-user-dir=` that specified empty path.

This change corrects the behavior. It fixes the issue
https://github.com/llvm/llvm-project/issues/56836 ([clang] [test]
test/Driver/config-file-errs.c fails if CLANG_CONFIG_FILE_SYSTEM_DIR is
specified).