[all-commits] [llvm/llvm-project] d00e84: [Clang] Add option to set alternative toolchain path

[Qiu Chaofan via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: d00e8400e2e3a602fdf40cd7348ed113952261d3
      https://github.com/llvm/llvm-project/commit/d00e8400e2e3a602fdf40cd7348ed113952261d3
  Author: Qiu Chaofan <qiucofan at cn.ibm.com>
  Date:   2022-03-24 (Thu, 24 Mar 2022)

  Changed paths:
    M clang/docs/ClangCommandLineReference.rst
    M clang/include/clang/Driver/Driver.h
    M clang/include/clang/Driver/Options.td
    M clang/lib/Driver/Driver.cpp
    M clang/lib/Driver/ToolChains/Gnu.cpp
    M clang/lib/Driver/ToolChains/Linux.cpp
    A clang/test/Driver/Inputs/powerpc64le-linux-gnu-tree/gcc-11.2.0/include/.keep
    A clang/test/Driver/Inputs/powerpc64le-linux-gnu-tree/gcc-11.2.0/lib64/.keep
    A clang/test/Driver/Inputs/powerpc64le-linux-gnu-tree/gcc-8.3.0/include/.keep
    A clang/test/Driver/Inputs/powerpc64le-linux-gnu-tree/gcc-8.3.0/lib/gcc/powerpc64le-linux-gnu/8.3.0/.keep
    A clang/test/Driver/Inputs/powerpc64le-linux-gnu-tree/gcc-8.3.0/lib64/.keep
    A clang/test/Driver/overlay-toolchain.cpp

  Log Message:
  -----------
  [Clang] Add option to set alternative toolchain path

In some cases, we need to set alternative toolchain path other than the
default with system (headers, libraries, dynamic linker prefix, ld path,
etc.), e.g., to pick up newer components, but keep sysroot at the same
time (to pick up extra packages).

This change introduces a new option --overlay-platform-toolchain to set
up such alternative toolchain path.

Reviewed By: hubert.reinterpretcast

Differential Revision: https://reviews.llvm.org/D121992