[PATCH] D130724: [MC] Support writing ELFCOMPRESS_ZSTD compressed debug info sections

[Fangrui Song via Phabricator via llvm-commits]

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and add --compress-debug-sections=zstd to llvm-mc for testing.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D130724

Files:
  llvm/lib/MC/ELFObjectWriter.cpp
  llvm/test/MC/ELF/compress-debug-sections-zlib-unavailable.s
  llvm/test/MC/ELF/compress-debug-sections-zstd-unavailable.s
  llvm/test/MC/ELF/compress-debug-sections-zstd.s
  llvm/tools/llvm-mc/llvm-mc.cpp

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