POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/functions/roundf.html}
-Gnulib module: roundf
+Gnulib module: roundf or roundf-ieee
-Portability problems fixed by Gnulib:
+Portability problems fixed by either Gnulib module @code{roundf} or @code{roundf-ieee}:
@itemize
@item
This function is missing on some platforms:
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.
@item
This function is not declared on some platforms:
-OSF/1 5.1.
+glibc 2.8, OSF/1 5.1.
@item
This functions returns a wrong result for x = 1/2 - 2^-25 on some platforms:
mingw.
@end itemize
+Portability problems fixed by Gnulib module @code{roundf-ieee}:
+@itemize
+@item
+This function returns a positive zero for an argument between -0.5 and 0
+on some platforms:
+AIX 7.1, OSF/1 5.1.
+@item
+This function returns a positive zero for a minus zero argument
+on some platforms:
+OSF/1 5.1.
+@end itemize
+
Portability problems not fixed by Gnulib:
@itemize
@end itemize