Add libc_hidden_proto.
(STRTOF): Add libc_hidden_proto.
(___new_strtold_l, ___new_wcstold_l): New weak aliases.
(strtold_l, wcstold_l): Use them as second argument for
long_double_symbol.
nptl/
* sysdeps/unix/sysv/linux/alpha/lowlevellock.h (__lll_unlock,
__lll_robust_unlock): Rewrite as macros instead of inline functions.
* sysdeps/unix/sysv/linux/s390/lowlevellock.h (__lll_unlock,
__lll_robust_unlock, __lll_wait_tid): Likewise.