[clang] [Clang][Driver] Revise Cygwin ToolChain to call linker directly (PR #147960)

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jeremyd2019 wrote:

There seems to be some other issue with this patch on 32-bit that I need to track down: when building llvm/clang/compiler-rt 21 with this patch with a clang 21 with this patch, I get errors building compiler-rt builtins (which uses the freshly-built clang).  The fact that this only happens on the second build is confusing, because it does use the freshly-built clang in this case.  I'm thinking it must be something to do with linker flags.  `--large-address-aware`?

https://github.com/llvm/llvm-project/pull/147960