master
Make index/rindex weak aliases of strchr/strrchr since they are not part of the ISO C standard and have also been dropped from POSIX. OK guenther@ kettenis@
Add framework for resolving (pun intended) libc namespace issues, using wrapper .h files and asm labels to let internal calls resolve directly and not be overridable or use the PLT. Then, apply that framework to most of the functions in stdio.h, string.h, err.h, and wchar.h. Delete the should-have-been-hidden-all-along _v?(err|warn)[cx]? symbols while here.
Instead of trying to handle ffs() with the normal rename-mark-hidden-and-alias dance, mark it protected. This works better for both gcc and clang: gcc blocks overriding of internal calls, while clang permits inlining again.