Add tab with build information to Help > About LyX

The tab displays the same information as the 'lyx --version' command.

src/frontends/qt4/GuiAbout.cpp

@@ -132,6 +132,18 @@ static QString version()
 	return res;
 }
 
+static QString buildinfo()
+{
+	QString res;
+	QTextStream out(&res);
+	out << "LyX " << lyx_version
+		<< " (" << lyx_release_date << ")" << endl;
+	out << "Built on " << __DATE__ << ", " << __TIME__ << endl;
+
+	out << lyx_version_info << endl;
+	return res;
+}
+
 
 struct GuiAbout::Private
 {
@@ -152,6 +164,7 @@ GuiAbout::GuiAbout(GuiView & lv)
 	d->ui.copyrightTB->append(disclaimer());
 
 	d->ui.versionLA->setText(version());
+	d->ui.buildinfoTB->setText(buildinfo());
 	d->ui.creditsTB->setHtml(credits());
 }
 

src/frontends/qt4/ui/AboutUi.ui

@@ -94,6 +94,22 @@
        </item>
       </layout>
      </widget>
+     <widget class="QWidget" name="buildinfotab" >
+      <attribute name="title" >
+       <string>Build Info</string>
+      </attribute>
+      <layout class="QGridLayout" >
+       <property name="margin" >
+        <number>9</number>
+       </property>
+       <property name="spacing" >
+        <number>6</number>
+       </property>
+       <item row="0" column="0" >
+        <widget class="QTextBrowser" name="buildinfoTB" />
+       </item>
+      </layout>
+     </widget>
     </widget>
    </item>
    <item row="1" column="0" >