@node ceil
@section @code{ceil}
@findex ceil

POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/functions/ceil.html}

Gnulib module: ceil or ceil-ieee

Portability problems fixed by either Gnulib module @code{ceil} or @code{ceil-ieee}:
@itemize
@end itemize

Portability problems fixed by Gnulib module @code{ceil-ieee}:
@itemize
@item
This function returns a positive zero for an argument between @minus{}1 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