@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