[clang] [llvm] [CodeGen][ObjC] Initial WebAssembly Support for GNUstep (PR #169043)

[Hugo Melder via llvm-commits]

hmelder wrote:

@sunfishcode, I see that you are the original author of https://reviews.llvm.org/D62542. As @dschuff said in the review back then:

> I'm hoping we can make that export behavior nicer soon; I find the attribute(used) -> export behavior a bit odd too. Once we drop fastcomp it will be easier to redefine EMSCRIPTEN_KEEPALIVE and other things.

This was in 2019, is this hack still required now that fastcomp is deprecated? Then problem with the current behaviour is that hidden no-strip symbols, added during codegen, are exported.

https://github.com/llvm/llvm-project/pull/169043