rsmith added inline comments.
================
Comment at: lib/Driver/Tools.cpp:284
+ // propagate -fdiagnostics-color.
+ if (StringRef(TC.GetLinkerPath()).endswith("ld.lld") &&
+ D.getDiags().getShowColors())
----------------
I don't think this will work for `-fuse-ld=$BINDIR/lld` and the like. We also
have code around Tools.cpp doing things like this:
const char *Exec = Args.MakeArgString(ToolChain.GetLinkerPath());
if (llvm::sys::path::filename(Exec) == "lld") {
and
const char *Exec = Args.MakeArgString(ToolChain.GetLinkerPath());
if (llvm::sys::path::stem(Exec).equals_lower("lld")) {
so detecting `ld.lld` here seems inconsistent. (Meanwhile, the above checks
won't fire for `-fuse-ld=lld`, since that sets the linker path to .../ld.lld.)
I think it's time to factor out an `isLinkerLLD` function and use that to
detect whether we're using lld.
https://reviews.llvm.org/D27603
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