memchr
======

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

Gnulib module: memchr

Portability problems fixed by Gnulib:

  * This function is missing on some older platforms.

  * This function dereferences too much memory on some platforms: glibc 2.10 on x86_64, IA-64; glibc 2.11 on Alpha.

Portability problems not fixed by Gnulib: