[SR-15376] Duplicate "__PROTOCOL_*" metadata in linked binaries #57698
Description
| Previous ID | SR-15376 |
| Radar | None |
| Original Reporter | alxb (JIRA User) |
| Type | Bug |
Additional Detail from JIRA
| Votes | 0 |
| Component/s | |
| Labels | Bug |
| Assignee | None |
| Priority | Medium |
md5: 9d567090a81023015bb0128b792a70ec
Issue Description:
Some binaries show duplicate entries such as:
__PROTOCOL_NSObjectalong with all descending linked metadata.
The Issue seems to be coming from GenClass.cpp#L1396 where, a global is created with internal linkage: GenClass.cpp#L2181. Because of the internal linkage, the linker will not merge identical records in the final output.
The fix seems to be updating the linkage to WeakAnyLinkage, as in ObjC
CGObjCMac.cpp#L6967