[llvm] [gSYM] Add support merged functions in gSYM format (PR #101604)

[via llvm-commits]

alx32 wrote:

> do we want to try and only enable this if we see the new DWARF attribute

On the Mach-O side, this behavior has to be intentionally requested by passing "--keep-icf-stabs", it won't just be the default. For ELF, I am not sure if this will become the default, but I suspect not. Are there any other scenarios we should consider ?

Either way, should we have this behavior under a flag ? Since actually using the information will require gSYM clients to provide additional callstack information during address resolution - do we want to enable creating gSYM's without this information, so that if someone is not using the feature, the additional data will not be included, since it's not going to be used anyway ? 



https://github.com/llvm/llvm-project/pull/101604