@node strcasestr
@subsection @code{strcasestr}
@findex strcasestr

LSB specification:@* @url{https://refspecs.linuxbase.org/LSB_5.0.0/LSB-Core-generic/LSB-Core-generic/baselib-strcasestr.html}

Documentation:
@itemize
@item
@ifinfo
@ref{Search Functions,,Search Functions,libc},
@end ifinfo
@ifnotinfo
@url{https://www.gnu.org/software/libc/manual/html_node/Search-Functions.html},
@end ifnotinfo
@item
@uref{https://www.kernel.org/doc/man-pages/online/pages/man3/strcasestr.3.html,,man strcasestr}.
@end itemize

Gnulib module: strcasestr or strcasestr-simple

Portability problems fixed by either Gnulib module @code{strcasestr-simple}
or @code{strcasestr}:
@itemize
@item
This function is missing on some platforms:
AIX 7.2, HP-UX 11, IRIX 6.5, Solaris 10, Cygwin 1.5.x, mingw, MSVC 14.
@item
This function can trigger memchr bugs on some platforms:
glibc 2.10.
@item
This function can trigger false positives for long periodic needles on
some platforms:
glibc 2.12, Cygwin 1.7.7.
@item
This function may fail to find matches on some platforms:
glibc 2.28.
@end itemize

Portability problems fixed by Gnulib module @code{strcasestr}:
@itemize
@item
This function has quadratic instead of linear worst-case complexity on some
platforms:
glibc 2.8, musl libc 1.2.3, macOS 12.5, FreeBSD 13.1, NetBSD 9.0, OpenBSD 7.2, Solaris 11.4.
@end itemize

Portability problems not fixed by Gnulib:
@itemize
@end itemize
