strstr
======

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

Gnulib module: strstr or strstr-simple

Portability problems fixed by either Gnulib module strstr-simple or strstr:

  * This function can trigger memchr bugs on some platforms: glibc 2.10.

  * This function can trigger false positives for long periodic needles on some platforms: glibc 2.12, Cygwin 1.7.7.

Portability problems fixed by Gnulib strstr:

  * This function has quadratic instead of linear worst-case complexity on some platforms: glibc 2.8, MacOS X 10.5, FreeBSD 6.2, NetBSD 3.0, OpenBSD 4.0, AIX 5.1, HP-UX 11, IRIX 6.5, OSF/1 5.1, Solaris 10, Cygwin 1.5.x, mingw.

Portability problems not fixed by Gnulib:

  * This function cannot work correctly on character strings in most multibyte locales.  Gnulib provides an alternative function mbsstr that works on character strings in all locales.