[PATCH] D112890: headers: optionalise some generated resource headers

[Evan Wilde via Phabricator via cfe-commits]

etcwilde added a comment.

This makes sense to me. It doesn't make sense to spend the time generating files that will never get used, nor spend the space for storing them.
`riscv_vector.h` in particular is quite large, coming in at just under 10M, and there are two of them showing up in my build at `tools/clang/lib/Headers/riscv_vector.h` and `lib/clang/10.0.0/include/riscv_vector.h`.


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D112890/new/

https://reviews.llvm.org/D112890