.BR finite (),
.BR finitef (),
.BR finitel ():
+.RS 4
_BSD_SOURCE || _SVID_SOURCE
-.br
+.RE
.BR isinf ():
+.RS 4
_BSD_SOURCE || _SVID_SOURCE || _XOPEN_SOURCE\ >=\ 600 || _ISOC99_SOURCE;
+.br
+or
.I cc\ -std=c99
+.RE
.br
.BR isinff (),
.BR isinfl ():
+.RS 4
_BSD_SOURCE || _SVID_SOURCE
-.br
+.RE
.BR isnan ():
+.RS 4
_BSD_SOURCE || _SVID_SOURCE || _XOPEN_SOURCE || _ISOC99_SOURCE;
-.I cc\ -std=c99
.br
+or
+.I cc\ -std=c99
+.RE
.BR isnanf (),
.BR isnanl ():
+.RS 4
_BSD_SOURCE || _SVID_SOURCE || _XOPEN_SOURCE\ >=\ 600
+.RE
.ad b
.SH ÀâÌÀ
.BR finite ()