[PATCH] D97743: Define __GCC_HAVE_DWARF2_CFI_ASM if applicable

[Fangrui Song via Phabricator via cfe-commits]

MaskRay added a comment.

In D97743#2613629 <https://reviews.llvm.org/D97743#2613629>, @jansvoboda11 wrote:

> Could the logic be implemented in the driver?
>
> LGTM regardless.

No. `Res` is a `clang::CompilerInvocation` object. `CompilerInvocation` is not in the driver...


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