.\" Formatted or processed versions of this manual, if unaccompanied by
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-.TH CEIL 3 2008-08-05 "" "Linux Programmer's Manual"
+.TH CEIL 3 2010-09-20 "" "Linux Programmer's Manual"
.SH NAME
ceil, ceilf, ceill \- ceiling function: smallest integral value not
less than argument
.ad l
.BR ceilf (),
.BR ceill ():
-_BSD_SOURCE || _SVID_SOURCE || _XOPEN_SOURCE\ >=\ 600 || _ISOC99_SOURCE; or
+.RS 4
+_BSD_SOURCE || _SVID_SOURCE || _XOPEN_SOURCE\ >=\ 600 || _ISOC99_SOURCE ||
+_POSIX_C_SOURCE\ >=\ 200112L;
+.br
+or
.I cc\ -std=c99
-.ad b
+.RE
+.ad
.SH DESCRIPTION
These functions return the smallest integral value that is not less than
.IR x .