[all-commits] [llvm/llvm-project] a0365a: [Driver] Support -gz=zstd

[Fangrui Song via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: a0365abad8113d7e60294c5e581c24ec06ba037e
      https://github.com/llvm/llvm-project/commit/a0365abad8113d7e60294c5e581c24ec06ba037e
  Author: Fangrui Song <i at maskray.me>
  Date:   2022-09-08 (Thu, 08 Sep 2022)

  Changed paths:
    M clang/include/clang/Basic/DiagnosticDriverKinds.td
    M clang/include/clang/Driver/Options.td
    M clang/lib/Driver/ToolChains/Clang.cpp
    M clang/lib/Driver/ToolChains/CommonArgs.cpp
    M clang/lib/Driver/ToolChains/Gnu.cpp
    M clang/test/CMakeLists.txt
    A clang/test/Driver/compress-unavailable.s
    A clang/test/Driver/compress-zstd.c
    R clang/test/Driver/nozlibcompress.c
    M clang/test/Misc/cc1as-compress.s
    M clang/test/lit.site.cfg.py.in

  Log Message:
  -----------
  [Driver] Support -gz=zstd

The driver option translates to --compress-debug-sections=zstd cc1/cc1as/GNU
assembler/linker options.

`clang -g -gz=zstd -c a.c` generates ELFCOMPRESS_ZSTD compressed debug info
sections if compression decreases size.