dberris added inline comments.
================
Comment at: lib/Driver/Tools.cpp:4903-4906
+ if (Triple.getOS() != llvm::Triple::Linux)
+ D.Diag(diag::err_drv_clang_unsupported)
+ << (std::string(XRayInstrumentOption) + " on non-Linux target OS.");
+ switch (Triple.getArch()) {
----------------
Did you need to put an `else` before the switch? I don't know what happens when
you're on Windows non-supported platform -- will this cause two diagnostics to
be printed?
https://reviews.llvm.org/D26415
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