[all-commits] [llvm/llvm-project] de3e3f: [BOLT][CMAKE] Accept BOLT_CLANG_EXE and BOLT_LLD_EXE

[Amir Aupov via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: de3e3fcfa3bb0c2585a0395a2f42ab0ec755690b
      https://github.com/llvm/llvm-project/commit/de3e3fcfa3bb0c2585a0395a2f42ab0ec755690b
  Author: Amir Ayupov <aaupov at fb.com>
  Date:   2022-01-15 (Sat, 15 Jan 2022)

  Changed paths:
    M bolt/CMakeLists.txt
    M bolt/test/CMakeLists.txt
    M bolt/test/lit.cfg.py
    M bolt/test/lit.site.cfg.py.in

  Log Message:
  -----------
  [BOLT][CMAKE] Accept BOLT_CLANG_EXE and BOLT_LLD_EXE

Add CMake options to supply clang and lld binaries for use in check-bolt
instead of requiring the build of clang and lld projects.

Suggested by Mehdi Amini in https://lists.llvm.org/pipermail/llvm-dev/2021-December/154426.html

Test Plan:
```
cmake -G Ninja ~/local/llvm-project/llvm \
-DLLVM_TARGETS_TO_BUILD="X86"  \
-DCMAKE_BUILD_TYPE=Release \
-DLLVM_ENABLE_ASSERTIONS=ON \
-DLLVM_ENABLE_PROJECTS="bolt"  \
-DBOLT_CLANG_EXE=~/local/bin/clang \
-DBOLT_LLD_EXE=~/local/bin/lld

ninja check-bolt
...
llvm-lit: /home/aaupov/local/llvm-project/llvm/utils/lit/lit/llvm/config.py:436: note: using clang: /home/aaupov/local/bin/clang
llvm-lit: /home/aaupov/local/llvm-project/llvm/utils/lit/lit/llvm/config.py:436: note: using ld.lld: /home/aaupov/local/bin/ld.lld
llvm-lit: /home/aaupov/local/llvm-project/llvm/utils/lit/lit/llvm/config.py:436: note: using lld-link: /home/aaupov/local/bin/lld-link
llvm-lit: /home/aaupov/local/llvm-project/llvm/utils/lit/lit/llvm/config.py:436: note: using ld64.lld: /home/aaupov/local/bin/ld64.lld
llvm-lit: /home/aaupov/local/llvm-project/llvm/utils/lit/lit/llvm/config.py:436: note: using wasm-ld: /home/aaupov/local/bin/wasm-ld
...
```

Tested all configurations:
- LLVM_ENABLE_PROJECTS="bolt;clang;lld" + no BOLT_*_EXE
- LLVM_ENABLE_PROJECTS="bolt;clang" + BOLT_LLD_EXE
- LLVM_ENABLE_PROJECTS="bolt;lld" + BOLT_CLANG_EXE
- LLVM_ENABLE_PROJECTS="bolt" + BOLT_CLANG_EXE + BOLT_LLD_EXE
- LLVM_ENABLE_PROJECTS="bolt;clang;lld" + BOLT_CLANG_EXE + BOLT_LLD_EXE

Reviewed By: maksfb

Differential Revision: https://reviews.llvm.org/D117061