[PATCH] D92505: [ms] [llvm-ml] Warn on redefinition of a command-line definition

[Eric Astor via Phabricator via llvm-commits]

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If a macro is defined on the command line and then overridden in the source code, this is likely to be an error in the user's build system. We should warn on this.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D92505

Files:
  llvm/lib/MC/MCParser/MasmParser.cpp
  llvm/test/tools/llvm-ml/command_line_defines.asm

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