No subject

[bogus at does.not.exist.com]

__BEGIN_NAMESPACE_STD
/* Return a string describing the meaning of the `errno' code in ERRNUM.  */
extern char *strerror (int __errnum) __THROW;
__END_NAMESPACE_STD
#if defined __USE_XOPEN2K || defined __USE_MISC
/* Reentrant version of `strerror'.
   There are 2 flavors of `strerror_r', GNU which returns the string
   and may or may not use the supplied temporary buffer and POSIX one
   which fills the string into the buffer.
   To use the POSIX version, -D_XOPEN_SOURCE=600 or -D_POSIX_C_SOURCE=200112L
   without -D_GNU_SOURCE is needed, otherwise the GNU version is
   preferred.  */
# if defined __USE_XOPEN2K && !defined __USE_GNU
/* Fill BUF with a string describing the meaning of the `errno' code in
   ERRNUM.  */
#  ifdef __REDIRECT_NTH
extern int __REDIRECT_NTH (strerror_r,
			   (int __errnum, char *__buf, size_t __buflen),
			   __xpg_strerror_r) __nonnull ((2));

Thanks to Knuth we're using the standard flavour, that's why I don't
see compilation warnings, while the GNU libc manual miserably fails at
describing the only version which is worth to use (I mean the POSIX
one).

Regards.
-- 
FFmpeg = Fiendish and Fundamentalist Magical Ponderous Exploitable Gem