5 Unspecified by POSIX, but comparable to @code{strstr}.
7 Gnulib module: memmem or memmem-simple
9 Portability problems fixed by either Gnulib module @code{memmem-simple}
13 This function is missing on some platforms:
17 This function has reversed arguments on some older platforms:
21 Portability problems fixed by Gnulib module @code{memmem}:
24 This function returns incorrect values in some cases, such as when
25 given an empty needle:
26 glibc <= 2.0, cygwin 1.5.x
29 This function has quadratic instead of linear complexity on some
31 glibc <= 2.6.1, cygwin 1.5.x
34 Portability problems not fixed by Gnulib: