@node modf
@subsection @code{modf}
@findex modf

POSIX specification:@* @url{https://pubs.opengroup.org/onlinepubs/9799919799/functions/modf.html}

Gnulib module: modf or modf-ieee
@mindex modf
@mindex 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 7.3, mingw with MSVCRT.
@end itemize

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