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@node modf
@section @code{modf}
@findex modf

POSIX specification:@* @url{https://pubs.opengroup.org/onlinepubs/9699919799/functions/modf.html}

Gnulib module: modf or modf-ieee

Portability problems fixed by either Gnulib module @code{modf} or @code{modf-ieee}:
@itemize
@end itemize

Portability problems fixed by Gnulib module @code{modf-ieee}:
@itemize
@item
This function has problems with a NaN argument on some platforms:
NetBSD 5.1, Cygwin.
@item
This function has problems with infinite arguments on some platforms:
FreeBSD 6.4, OpenBSD 4.9, IRIX 6.5.
@end itemize

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