MaskRay added inline comments.
================
Comment at: clang/lib/Driver/ToolChains/Clang.cpp:5651
+ // -fno-common is the default, set -fcommon only when that flag is set.
+ if (Args.hasFlag(options::OPT_fcommon, options::OPT_fno_common, false))
+ CmdArgs.push_back("-fcommon");
----------------
cc1 does not check -fcommon: `Opts.NoCommon = Args.hasArg(OPT_fno_common);`
I think you can flip it to `Opts.NoCommon = !Args.hasArg(OPT_fcommon);`
and change here to pass `-fcommon` if `Args.hasFlag(options::OPT_fcommon,
options::OPT_fno_common, false)`
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D75056/new/
https://reviews.llvm.org/D75056
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