[llvm] Initial changes for llvm shared library build using explicit visibility annotations (PR #96630)

[Martin Storsjö via llvm-commits]

mstorsjo wrote:

> Something i do wonder about is if loadable llvm and clang plugins work on mingw currently? some of my later changes to make them work for windows could also fix them for mingw if they don't currently work.

I’m not entirely sure. Iirc there are multiple kinds of plugins within all of LLVM, some kinds do work, while others don’t, if I remember correctly.


https://github.com/llvm/llvm-project/pull/96630