llvm-project

c7fc95ba - [Object][Archive][NFC] Create all symbolic files objects before calculating offsets. (#85229)

[Object][Archive][NFC] Create all symbolic files objects before calculating offsets. (#85229) This is refactoring preparing to move UseECMap computation to the archive writer. We currently require writeArchive caller to pass that. This is not practical for llvm-ar, which currently interprets at most one passed object. For a reliable UseECMap, we need to interpret all symbolic objects: we may have, for example, a list of x86_64 files followed by aarch64 file, which indicates that we should use EC map for x86_64 objects. This commit interprets symbolic files in a separated pass, which will be a convenient place to implement UseECMap computation in the follow up. It also makes accessing the next member for AIX big archive offset computation a bit easier.