dprintf
=======

POSIX specification:
 http://www.opengroup.org/onlinepubs/9699919799/functions/dprintf.html

Gnulib module: dprintf or dprintf-posix

Portability problems fixed by either Gnulib module dprintf or dprintf-posix:

  * This function is missing on many non-glibc platforms: Mac OS X 10.5, FreeBSD 6.0, NetBSD 5.0, OpenBSD 3.8, Minix 3.1.8, AIX 5.1, HP-UX 11, IRIX 6.5, OSF/1 5.1, Solaris 11 2011-11, Cygwin 1.5.x, mingw, MSVC 9, Interix 3.5, BeOS.

Portability problems fixed by Gnulib module dprintf-posix:

  * printf of long double numbers outside the IEEE 754 range produces no meaningful results on some platforms: glibc and others, on x86, x86_64, IA-64 CPUs.

  * This function does not support the a and A directives on some platforms: glibc-2.3.6.

  * This function does not support precisions larger than 512 or 1024 in integer, floating-point and pointer output on some platforms: AIX 7.1.

Portability problems not fixed by Gnulib:

  * When formatting an integer with grouping flag, this function inserts thousands separators even in the "C" locale on some platforms: NetBSD 5.1.

  * On some platforms, this function does not set errno or the stream error indicator on attempts to write to a read-only stream: Cygwin 1.7.9.