5 POSIX specification:@* @url{https://pubs.opengroup.org/onlinepubs/9699919799/functions/fmod.html}
7 Gnulib module: fmod or fmod-ieee
9 Portability problems fixed by either Gnulib module @code{fmod} or @code{fmod-ieee}:
13 Portability problems fixed by Gnulib module @code{fmod-ieee}:
16 This function has problems when the first argument is minus zero on some
21 Portability problems not fixed by Gnulib: