5 POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/functions/perror.html}
9 Portability problems fixed by Gnulib:
12 This function does not support the error values that are specified by POSIX
13 but not defined by the system, on some platforms:
14 OpenBSD 4.0, OSF/1 5.1, Cygwin 1.5.x, mingw.
16 This function treats @code{errno} of 0 like failure, although POSIX
17 requires that the message declare it as a success, on some platforms:
21 Portability problems not fixed by Gnulib:
24 POSIX requires that this function set the stream error bit (detected
25 by @code{ferror}) on write failure, but not all platforms do this:
26 glibc 2.13, cygwin 1.7.9.
28 POSIX requires that this function not alter stream orientation, but
29 the gnulib replacement locks in byte orientation and fails on wide