Fix for older QT libs, thanks to:

phirsch · phirsch · commit 060fe8f693f9 · 2012-05-12T16:56:07.000+02:00
http://superkuh.com/gnuradio.html#gqrx_qtstuff
diff --git a/qtgui/dockaudio.cpp b/qtgui/dockaudio.cpp
@@ -109,7 +109,7 @@ void DockAudio::on_audioRecButton_clicked(bool checked)
 {
     if (checked) {
         // FIXME: option to use local time
-        lastAudio = QDateTime::currentDateTimeUtc().toString("gqrx-yyyyMMdd-hhmmss.'wav'");
+        lastAudio = QDateTime::currentDateTime().toUTC().toString("gqrx-yyyyMMdd-hhmmss.'wav'");
 
         // emit signal and start timer
         emit audioRecStarted(lastAudio);

Original file line number	Diff line number	Diff line change
`@@ -109,7 +109,7 @@ void DockAudio::on_audioRecButton_clicked(bool checked)`
`109`	`109`	`{`
`110`	`110`	`if (checked) {`
`111`	`111`	`// FIXME: option to use local time`
`112`		`- lastAudio = QDateTime::currentDateTimeUtc().toString("gqrx-yyyyMMdd-hhmmss.'wav'");`
	`112`	`+ lastAudio = QDateTime::currentDateTime().toUTC().toString("gqrx-yyyyMMdd-hhmmss.'wav'");`
`113`	`113`
`114`	`114`	`// emit signal and start timer`
`115`	`115`	`emit audioRecStarted(lastAudio);`