Add a summary of optional features at the end of the configuration stage.

src/contrib/stats/wscript

@@ -7,6 +7,10 @@ def configure(conf):
    e.define = 'SQLITE3'
    e.uselib = 'SQLITE3'
    conf.env['SQLITE_STATS'] = e.run()
+   conf.report_optional_feature("SqliteDataOutput", "SQlite stats data output",
+                                conf.env['SQLITE_STATS'],
+                                "library 'sqlite3' not found")
+
 
 def build(bld):
     obj = bld.create_ns3_module('stats', ['node'])

src/contrib/wscript

@@ -6,6 +6,10 @@ def configure(conf):
     check.uselib = 'GTK_CONFIG_STORE'
     check.mandatory = False
     conf.env['ENABLE_GTK_CONFIG_STORE'] = check.run()
+    conf.report_optional_feature("GtkConfigStore", "GtkConfigStore",
+                                 conf.env['ENABLE_GTK_CONFIG_STORE'],
+                                 "library 'gtk+-2.0 >= 2.12' not found")
+
     conf.sub_config('stats')
 
 def build(bld):

src/internet-stack/wscript

@@ -37,6 +37,8 @@ def configure(conf):
         e.run()
 
     if not Params.g_options.nsc:
+        conf.report_optional_feature("nsc", "Network Simulation Cradle", False,
+                                     "--nsc configure option not given")
 	return
 
     check_nsc_buildutils()
@@ -55,6 +57,8 @@ def configure(conf):
         e.run()
         ok = True
     conf.check_message('NSC supported architecture', arch, ok)
+    conf.report_optional_feature("nsc", "Network Simulation Cradle", ok,
+                                 "architecture %r not supported" % arch)
     nsc_fetch()