Give URLs for vcdimager and libcddb when packages are not found or

are new enough.

configure.ac

@@ -16,7 +16,7 @@ dnl Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
 dnl 02111-1307, USA.
 
 AC_PREREQ(2.52)
-AC_REVISION([$Id: configure.ac,v 1.60 2004/02/21 18:35:16 rocky Exp $])dnl
+AC_REVISION([$Id: configure.ac,v 1.61 2004/02/22 09:34:15 rocky Exp $])dnl
 AC_INIT(libcdio, 0.67cvs)
 AC_CONFIG_SRCDIR(src/cd-info.c)
 AM_INIT_AUTOMAKE
@@ -89,7 +89,6 @@ fi
 AC_SUBST(DIFF)
 AC_SUBST(DIFF_OPTS)
 
-
 AM_PATH_LIBPOPT(, [enable_cd_info=no])
 
 dnl headers
@@ -285,7 +284,7 @@ if test x$enable_cddb = xyes; then
     HAVE_CDDB=yes 
     AC_DEFINE(HAVE_CDDB, [], [Define this if you have libcddb installed])
     ],
-    [AC_MSG_WARN(new enough libcddb not found. CDDB access disabled) 
+    [AC_MSG_WARN(new enough libcddb not found. CDDB access disabled. Get libcddb from http://libcddb.sourceforge.net) 
     HAVE_CDDB=no])
     AC_CHECK_LIB(socket, connect)
     AC_CHECK_FUNC(gethostbyname, , AC_CHECK_LIB(nsl, gethostbyname))
@@ -304,7 +303,8 @@ if test x$enable_vcd_info = xyes; then
   PKG_CHECK_MODULES(VCDINFO, libvcdinfo >= 0.7.20, 
   [AC_DEFINE([HAVE_VCDINFO],1, 
   [Define this if you have libvcdinfo installed])], 
-  [enable_vcd_info=no])
+  [AC_MSG_WARN(a new enough libvcdinfo not found. libvcdinfo is part of vcdimager. Get from http://vcdimager.org)
+   enable_vcd_info=no])
 fi
 
 AC_SUBST(VCDINFO_LIBS)