dberris added inline comments.
================
Comment at: lib/Driver/Tools.cpp:4777-4780
@@ +4776,6 @@
+ {
+ std::string Feature(XRayInstrumentOption);
+ Feature += " on ";
+ Feature += Triple.getArchName().data();
+ D.Diag(diag::err_drv_clang_unsupported) << Feature;
+ break;
----------------
Wouldn't something like this work better:
D.Diag(...) << XRayInstrumentOption << " on " << Triple.getArchName();
https://reviews.llvm.org/D24799
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