Use fseeko() instead of fseek() inside libc, as the latter just
calls the former with a loss of range. Mark fseek symbol as
deprecated to block accidental use in the future.

ok millert@ deraadt@

Make sure attributes are applied to function declarations before they're
used or defined, as clang isn't as forgiving as gcc. Also, declare
__flt_rounds() so that libc can build it despire clang pro

Make sure attributes are applied to function declarations before they're
used or defined, as clang isn't as forgiving as gcc. Also, declare
__flt_rounds() so that libc can build it despire clang providing its own
<float.h>

ok stefan@ kettenis@

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Use a Thread Information Block in both single and multi-threaded programs.
This stores errno, the cancelation flags, and related bits for each thread
and is allocated by ld.so or libc.a. This is an

Use a Thread Information Block in both single and multi-threaded programs.
This stores errno, the cancelation flags, and related bits for each thread
and is allocated by ld.so or libc.a. This is an ABI break from 5.9-stable!

Make libpthread dlopen'able by moving the cancelation wrappers into libc
and doing locking and fork/errno handling via callbacks that libpthread
registers when it first initializes. 'errno' *must* be declared via
<errno.h> now!

Clean up libpthread's symbol exports like libc.

On powerpc, offset the TIB/TCB/TLS data from the register per the ELF spec.

Testing by various, particularly sthen@ and patrick@
ok kettenis@

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Don't wrap initialized variables: binutils appears to be mishandling them
on arm and m88k

problems with optind observed by jsg@

Add PROTO_WRAP() for (almost) all the syscalls that libpthread doesn't
override so that internal calls go direct

ok deraadt@

Pull in namespace.h when building all .c files using gcc's -include option,
so that we can provide asm labels for the memcpy/memset/__stack_smash_handler
calls that it generates ab initio. Eliminate

Pull in namespace.h when building all .c files using gcc's -include option,
so that we can provide asm labels for the memcpy/memset/__stack_smash_handler
calls that it generates ab initio. Eliminate direct #includes of it. Make
sure it's a dependency of all objects (unnecessary for asm, but close enough).

ok deraadt@

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Fix aliasing of sys_errlist, sys_nerr, sys_siglist, and sys_signame
to eliminate duplicate copies of the tables and get direct access internally

ok kettenis@ deraadt@

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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