Fix warnings about binding changed to STB_WEAK on i386

Compiling libc on i386 results in compiler warnings for bcmp, bzero, bcopy,
brk, and sbrk. Use ENTRY_NB instead of ENTRY to avoid this.

ok jca

Fix warnings about binding changed to STB_WEAK on i386

Compiling libc on i386 results in compiler warnings for bcmp, bzero, bcopy,
brk, and sbrk. Use ENTRY_NB instead of ENTRY to avoid this.

ok jca millert

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clang doesn't propagate attributes like "asm labels" and "visibility(hidden)"
to builtins like mem{set,cpy,move} and __stack_smash_handler. So, when
building with clang, instead mark those as protec

clang doesn't propagate attributes like "asm labels" and "visibility(hidden)"
to builtins like mem{set,cpy,move} and __stack_smash_handler. So, when
building with clang, instead mark those as protected visibility to get rid
of the PLT relocations. We can't take the address of them then, but that's
ok: it's a build-time error not a run-time error.

ok kettenis@

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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

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.

tests clean on i386, amd64, sparc64, powerpc, and mips64

naming feedback from kettenis@ and millert@
ok kettenis@

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zap rcsid, tested there. okay deraadt@

Fix RCS ids
Make sure everything uses {SYS,}LIBC_SCCS properly

initial import of NetBSD tree