--- pkg-config-0.20/pkg-config.1	2006/08/02 23:02:52	1.1
+++ pkg-config-0.20/pkg-config.1	2006/08/02 23:04:30
@@ -305,6 +305,15 @@ use to display what went wrong.
 Defines the PKG_CONFIG variable to the best pkg-config available,
 useful if you need pkg-config but don't want to use PKG_CHECK_MODULES.
 
+.I "PKG_CHECK_EXISTS(MODULES, [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])"
+
+Check to see whether a particular set of modules exists.  Similar
+to PKG_CHECK_MODULES(), but does not set variables or print errors.
+
+Similar to PKG_CHECK_MODULES, make sure that the first instance of
+this or PKG_CHECK_MODULES is called, or make sure to call
+PKG_CHECK_EXISTS manually
+
 .SH METADATA FILE SYNTAX
 To add a library to the set of packages \fIpkg-config\fP knows about,
 simply install a \fI.pc\fP file. You should install this file to