[PATCH] D85474: Add -fbinutils-version= to gate ELF features on the specified binutils version

[Fangrui Song via Phabricator via cfe-commits]

MaskRay added a comment.

In D85474#2217598 <https://reviews.llvm.org/D85474#2217598>, @jhenderson wrote:

> Looks like there's only an `llc` test, but the option is in clang too? Should we have a test there?

There are generally some dotted edges in the testing of such MC level options. For options affecting IR generating, clang/test/CodeGen can do the tests. For MC level options, IR is not affected at all. Such tests belong to `llvm/test/CodeGen/`. However, clang cannot be used due to layering concerns. The closest (which is used by other options, e.g. -fuse-integrated-as, -Wa,-mrelax-relocations=) is to have some llc options similar to the clang driver options.


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