[clang] Remove Linux search paths on Windows (PR #113628)

[Joseph Huber via cfe-commits]

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@@ -6440,7 +6440,8 @@ const ToolChain &Driver::getToolChain(const ArgList &Args,
       TC = std::make_unique<toolchains::NVPTXToolChain>(*this, Target, Args);
       break;
     case llvm::Triple::AMDHSA:
-      TC = std::make_unique<toolchains::ROCMToolChain>(*this, Target, Args);
+      TC = std::make_unique<toolchains::ROCMToolChain>(*this, Target, Args,
+                                                       Target.isOSWindows());
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jhuber6 wrote:

I need to wrap my head around this more. We create multiple toolchains for offloading, the host toolchain and then the additional ones for offloading. All of those toolchains inherit from `Generic_GCC` in this case which initializes the detector. For the host toolchain this will just be the normal host triple, but for the GPU it should be the GPU target. Since we have the triple in the installation detector, we should just be able to change behavior if the OS is windows? We have the triple argument for ROCm we just don't use it, what's stopping you from just saving that triple inside the class and using it when we do our detection?

https://github.com/llvm/llvm-project/pull/113628