5 POSIX specification: @url{http://www.opengroup.org/susv3xsh/roundf.html}
9 Portability problems fixed by Gnulib:
12 This function is missing on some platforms:
13 FreeBSD 5.2.1, OpenBSD 3.8, AIX 5.1, HP-UX 11, IRIX 6.5, OSF/1 4.0, Solaris 9, Interix 3.5.
16 Portability problems not fixed by Gnulib: