--- a/configure.ac

+++ b/configure.ac

@@ -49,9 +49,9 @@ AC_SUBST(SRC_LIBS)

 dnl Check for Qt

 with_qt=no

-PKG_CHECK_MODULES(QT, [QtCore >= 4.0.1 QtGui >= 4.0.1],

+PKG_CHECK_MODULES(QT, [Qt5Core >= 4.0.1 Qt5Gui >= 4.0.1 Qt5Widgets >= 4.0.1],

     [with_qt=yes

-     QT_MOC=`$PKG_CONFIG --variable=moc_location QtCore`],

+     QT_MOC=`$PKG_CONFIG --variable=moc Qt5`],

     AC_MSG_NOTICE([pkg-config could not find Qt >= 4.0.1]))

 if test "x${with_qt}" = xno ; then

   case "${host_os}" in

--- a/examples/less_trivial_synth_qt_gui.cpp

+++ b/examples//less_trivial_synth_qt_gui.cpp

@@ -433,9 +433,9 @@ main(int argc, char **argv)

     QApplication application(argc, argv);

-    if (application.argc() != 5) {

+    if (argc != 5) {

 	cerr << "usage: "

-	     << application.argv()[0] 

+	     << argv[0]

 	     << " <osc url>"

 	     << " <plugin dllname>"

 	     << " <plugin label>"

@@ -448,7 +448,7 @@ main(int argc, char **argv)

     XSetErrorHandler(handle_x11_error);

 #endif

-    char *url = application.argv()[1];

+    char *url = argv[1];

     char *host = lo_url_get_hostname(url);

     char *port = lo_url_get_port(url);

--- a/examples//trivial_sampler_qt_gui.cpp

+++ b/examples//trivial_sampler_qt_gui.cpp

@@ -611,9 +611,9 @@ main(int argc, char **argv)

     QApplication application(argc, argv);

-    if (application.argc() != 5) {

+    if (argc != 5) {

 	cerr << "usage: "

-	     << application.argv()[0] 

+	     << argv[0] 

 	     << " <osc url>"

 	     << " <plugin dllname>"

 	     << " <plugin label>"

@@ -626,13 +626,13 @@ main(int argc, char **argv)

     XSetErrorHandler(handle_x11_error);

 #endif

-    char *url = application.argv()[1];

+    char *url = argv[1];

     char *host = lo_url_get_hostname(url);

     char *port = lo_url_get_port(url);

     char *path = lo_url_get_path(url);

-    char *label = application.argv()[3];

+    char *label = argv[3];

     bool stereo = false;

     if (QString(label).toLower() == QString(Sampler_Stereo_LABEL).toLower()) {

 	stereo = true;