Merge lp:~abreu-alexandre/cordova-ubuntu/add-debug-message-for-dlopen-failure into lp:cordova-ubuntu/2.8

[Alexandre Abreu]

Add a more precise debug message when a candidate for libcordovaplugins fails to load

Add a more precise debug message when a candidate for libcordovaplugins fails to load, which currently happens quite a bit ... and no context makes it hard to debug in some instances.

[PS Jenkins bot (ps-jenkins)]

PASSED: Continuous integration, rev:254
http://jenkins.qa.ubuntu.com/job/cordova-ubuntu-2.8-ci/8/
Executed test runs:
    SUCCESS: http://jenkins.qa.ubuntu.com/job/cordova-ubuntu-2.8-trusty-amd64-ci/2
    SUCCESS: http://jenkins.qa.ubuntu.com/job/cordova-ubuntu-2.8-trusty-armhf-ci/2

Click here to trigger a rebuild:
http://s-jenkins.ubuntu-ci:8080/job/cordova-ubuntu-2.8-ci/8/rebuild

review: Approve (continuous-integration)

[Robert Bruce Park (robru)]

lgtm

review: Approve

=== modified file 'src/cordova.cpp'
--- src/cordova.cpp	2013-07-23 10:30:29 +0000
+++ src/cordova.cpp	2014-01-30 03:23:54 +0000
@@ -104,7 +104,21 @@
 
             CordovaGetPluginInstances loader = (CordovaGetPluginInstances) QLibrary::resolve(path, "cordovaGetPluginInstances");
             if (!loader) {
-                qCritical() << "Missing cordovaGetPluginInstances symbol in" << path;
+                QLibrary library(path);
+                library.load();
+                if ( ! library.isLoaded())
+                {
+                    qCritical() << "Cannot load:"
+                                << path
+                                << ", reason:"
+                                << library.errorString();
+                }
+                else
+                {
+                    library.unload();
+                    qCritical() << "Missing cordovaGetPluginInstances symbol in"
+                                << path;
+                }
                 continue;
             }