9.856 remainder

POSIX specification:
http://www.opengroup.org/onlinepubs/9699919799/functions/remainder.html

Gnulib module: remainder or remainder-ieee

Portability problems fixed by either Gnulib module remainder or remainder-ieee:

• This function is missing on some platforms: MSVC 9.
• This function is not declared on some platforms: IRIX 5.3.

Portability problems fixed by Gnulib module remainder-ieee:

• This function has problems when the second argument is zero on some platforms: OSF/1 5.1.

Portability problems not fixed by Gnulib: