[PATCH] D104008: [ms] [llvm-ml] Warn on command-line redefinition

[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/D104008

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

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