stdio.h
=======

POSIX specification:
 https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/stdio.h.html

Gnulib module: stdio

Portability problems fixed by Gnulib:

  * The type off_t is missing on some platforms: glibc 2.8, eglibc 2.11.2 and others.

  * The type ssize_t is missing on some platforms: glibc 2.8, Mac OS X 10.5, Solaris 10, MSVC 14, and others.

  * The type va_list is missing on some platforms: glibc 2.8, OpenBSD 4.0, Solaris 11.4, and others.

  * Some platforms provide a NULL macro that cannot be used in arbitrary expressions: NetBSD 5.0

Portability problems not fixed by Gnulib: