[PATCH] D121560: [clang][Opt] Add NoArgUnusedWith to not warn for unused redundant options

[Alex Brachet via Phabricator via llvm-commits]

abrachet created this revision.
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`NoArgUnusedWith` can be used for options which together are redundant or not meaningful. This patch adds an example for `-static-libcxx` and `-nostdlib`. The former isn't meaningful with the latter. Projects might elect to build with a flag like `static-libcxx` globally and use `nostdlib` for specific TU's, in this case they would get unused args warnings.


https://reviews.llvm.org/D121560

Files:
  clang-tools-extra/clangd/CompileCommands.cpp
  clang/include/clang/Driver/Options.h
  clang/include/clang/Driver/Options.td
  clang/lib/Driver/Driver.cpp
  clang/lib/Driver/DriverOptions.cpp
  clang/lib/Frontend/CompilerInvocation.cpp
  clang/test/Driver/claim-unused.c
  lld/COFF/Driver.h
  lld/COFF/DriverUtils.cpp
  lld/ELF/Driver.h
  lld/ELF/DriverUtils.cpp
  lld/MachO/Driver.h
  lld/MachO/DriverUtils.cpp
  lld/MinGW/Driver.cpp
  lld/wasm/Driver.cpp
  lldb/tools/driver/Driver.cpp
  lldb/tools/lldb-server/lldb-gdbserver.cpp
  lldb/tools/lldb-vscode/lldb-vscode.cpp
  llvm/include/llvm/Option/OptParser.td
  llvm/include/llvm/Option/OptTable.h
  llvm/include/llvm/Option/Option.h
  llvm/lib/ToolDrivers/llvm-dlltool/DlltoolDriver.cpp
  llvm/lib/ToolDrivers/llvm-lib/LibDriver.cpp
  llvm/tools/dsymutil/dsymutil.cpp
  llvm/tools/llvm-cvtres/llvm-cvtres.cpp
  llvm/tools/llvm-cxxfilt/llvm-cxxfilt.cpp
  llvm/tools/llvm-lipo/llvm-lipo.cpp
  llvm/tools/llvm-ml/llvm-ml.cpp
  llvm/tools/llvm-mt/llvm-mt.cpp
  llvm/tools/llvm-nm/llvm-nm.cpp
  llvm/tools/llvm-objcopy/ObjcopyOptions.cpp
  llvm/tools/llvm-objdump/ObjdumpOptID.h
  llvm/tools/llvm-objdump/llvm-objdump.cpp
  llvm/tools/llvm-rc/llvm-rc.cpp
  llvm/tools/llvm-readobj/llvm-readobj.cpp
  llvm/tools/llvm-size/llvm-size.cpp
  llvm/tools/llvm-strings/llvm-strings.cpp
  llvm/tools/llvm-symbolizer/llvm-symbolizer.cpp
  llvm/tools/llvm-tli-checker/llvm-tli-checker.cpp
  llvm/unittests/Option/OptionMarshallingTest.cpp
  llvm/unittests/Option/OptionParsingTest.cpp
  llvm/utils/TableGen/OptParserEmitter.cpp

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