fwrite
======

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

Gnulib module: stdio, sigpipe

Portability problems fixed by Gnulib:

  * When writing to a pipe with no readers, this function fails, instead of obeying the current SIGPIPE handler, on some platforms: mingw.

Portability problems not fixed by Gnulib:

  * On Windows platforms (excluding Cygwin), this function does not set errno upon failure.