it's sufficient to say _once_ that the functions are macros; keep

the one which states sigemptyset() and sigfillset() are macros
Xref signal(7)

lib/libc/gen/sigsetops.3

@@ -1,4 +1,4 @@
-.\"	$NetBSD: sigsetops.3,v 1.10 2001/09/16 02:30:25 wiz Exp $
+.\"	$NetBSD: sigsetops.3,v 1.11 2001/11/23 18:30:11 jdolecek Exp $
 .\"
 .\" Copyright (c) 1983, 1991, 1993
 .\"	The Regents of the University of California.  All rights reserved.
@@ -67,12 +67,6 @@ or
 must be called for every object of type
 .Fa sigset_t
 before any other use of the object.
-.Fn sigemptyset
-and
-.Fn sigfillset
-are provided as macros, but actual functions are available
-if their names are undefined (with #undef
-.Em name ) .
 .Pp
 The
 .Fn sigemptyset
@@ -100,9 +94,10 @@ function returns whether a specified signal
 .Fa signo
 is contained in the signal set.
 .Pp
-These functions
-are provided as macros in the include file <signal.h>.
-Actual functions are available
+.Fn sigemptyset
+and
+.Fn sigfillset
+are provided as macros, but actual functions are available
 if their names are undefined (with #undef
 .Em name ) .
 .Sh RETURN VALUES
@@ -126,7 +121,8 @@ has an invalid value.
 .Sh SEE ALSO
 .Xr kill 2 ,
 .Xr sigaction 2 ,
-.Xr sigsuspend 2
+.Xr sigsuspend 2 ,
+.Xr signal 7
 .Sh STANDARDS
 These functions conform to
 .St -p1003.1-90 .