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@ifhtml
@node _index
@end ifhtml
@ifnothtml
@node index
@end ifnothtml
@section @code{index}
@findex index

POSIX specification: @url{https://pubs.opengroup.org/onlinepubs/009695399/functions/index.html}

Gnulib module: ---

Portability problems fixed by Gnulib:
@itemize
@end itemize

Portability problems not fixed by Gnulib:
@itemize
@item
This function is missing on some platforms:
mingw, MSVC 14, Android 9.0.
@item
This function is not declared on some platforms:
Android 13.
@item
This function is marked as ``legacy'' in POSIX@.  Better use @code{strchr}
instead.
@end itemize