[clang] [clang] [unittest] Add a test for Generic_GCC::GCCVersion::Parse (PR #69078)

[Martin Storsjö via cfe-commits]

mstorsjo wrote:

> Perhaps this belongs in the ABI-breaking-checks build?

Hmm, ideally I think it should be included in any build - let’s hope we don’t need to resort to that.

@tstellar @MaskRay Do either of you happen to know about this; would it be ok ABI wise to remove `LLVM_LIBRARY_VISIBILITY` from `clang::driver::toolchains::Generic_GCC` in order to be able to access it from unit tests in shared builds?

https://github.com/llvm/llvm-project/pull/69078