[llvm] [WebAssembly][Object]Use file offset as function symbol address for linked files (PR #76198)

[Sam Clegg via llvm-commits]

sbc100 wrote:

> Sorry, we raced. If we did this for relocatable objects, I think the linker relies on this address being a section offset? I haven't tried it though.

I yes, I suppose it must.   I wonder it would be simpler to update that.. of course that can be a followup too

https://github.com/llvm/llvm-project/pull/76198