[PATCH] D142933: Add -print-multi-selection-flags argument

[Joseph Faulls via Phabricator via cfe-commits]

Joe added a comment.

So again, I took these patches for a spin with RISC-V. As I mentioned before, I was using a GCC installation, so the multilib selection happens inside Gnu.cpp (findRISCVBareMetalMultilibs). The main trouble I had was at that point we don't have a reference to the ToolChain, so calling `getMultiSelectionFlags` was not possible. I had a go at making this function static, and it was mostly fine as you could just pass in the Triple and Driver, however `getSanitizerArgs` was not possible. I'm not sure what the solution here is.

Multilibs for RISCV are straightforward, they just depend arch+abi, so I added the arch extensions and abi to the Result in `getMultiSelectionFlags`.

With that modified `getMultiSelectionFlags`, it worked well :)


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https://reviews.llvm.org/D142933