Change include directory from local to system wide
--- a/examples/axes/src/axesmainwindow.cpp
+++ b/examples/axes/src/axesmainwindow.cpp
@@ -9,7 +9,7 @@
 
 #include "axes.h"
 #include "axesmainwindow.h"
-#include "../../../include/qwt3d_function.h"
+#include <qwt3d_function.h>
 
 using namespace std;
 using namespace Qwt3D;
--- a/examples/mesh2/src/colormapreader.h
+++ b/examples/mesh2/src/colormapreader.h
@@ -5,7 +5,7 @@
 #include <qframe.h>
 #include <qpixmap.h>
 
-#include "../../../include/qwt3d_types.h"
+#include <qwt3d_types.h>
 
 #if QT_VERSION < 0x040000
 
--- a/examples/mesh2/src/functions.h
+++ b/examples/mesh2/src/functions.h
@@ -2,8 +2,8 @@
 #define __EXAMPLE_H__
 
 #include <math.h>
-#include "../../../include/qwt3d_parametricsurface.h"
-#include "../../../include/qwt3d_function.h"
+#include <qwt3d_parametricsurface.h>
+#include <qwt3d_function.h>
 
 using namespace Qwt3D;
 
--- a/examples/mesh2/src/lightingdlg.h
+++ b/examples/mesh2/src/lightingdlg.h
@@ -3,10 +3,10 @@
 
 #include <math.h>
 #include <qapplication.h>
-#include "../../../include/qwt3d_parametricsurface.h"
-#include "../../../include/qwt3d_surfaceplot.h"
-#include "../../../include/qwt3d_enrichment.h"
-#include "../../../include/qwt3d_color.h"
+#include <qwt3d_parametricsurface.h>
+#include <qwt3d_surfaceplot.h>
+#include <qwt3d_enrichment.h>
+#include <qwt3d_color.h>
 
 #if QT_VERSION < 0x040000
 #include "lightingdlgbase.h"
--- a/examples/mesh2/src/mesh2mainwindow.cpp
+++ b/examples/mesh2/src/mesh2mainwindow.cpp
@@ -16,7 +16,7 @@
 #include <qtoolbar.h>
 #include <qimage.h>
 #include <qpixmap.h>
-#include <qfiledialog.h>       
+#include <qfiledialog.h>
 #include <qstatusbar.h>
 #include <qfileinfo.h>
 #include <qslider.h>
@@ -33,9 +33,9 @@
 #include "colormapreader.h"
 #include "lightingdlg.h"
 #include "femreader.h"
-#include "../../../include/qwt3d_io.h"
-#include "../../../include/qwt3d_io_gl2ps.h"
-#include "../../../include/qwt3d_io_reader.h"
+#include <qwt3d_io.h>
+#include <qwt3d_io_gl2ps.h>
+#include <qwt3d_io_reader.h>
 
 using namespace Qwt3D;
 using namespace std;
--- a/examples/mesh2/src/mesh2mainwindow.h
+++ b/examples/mesh2/src/mesh2mainwindow.h
@@ -1,7 +1,7 @@
 #ifndef mesh2mainwindow_h__2004_03_07_13_38_begin_guarded_code
 #define mesh2mainwindow_h__2004_03_07_13_38_begin_guarded_code
 
-#include "../../../include/qwt3d_surfaceplot.h"
+#include <qwt3d_surfaceplot.h>
 
 
 #if QT_VERSION < 0x040000
--- a/examples/enrichments/src/enrichmentmainwindow.cpp
+++ b/examples/enrichments/src/enrichmentmainwindow.cpp
@@ -6,7 +6,7 @@
 
 #include "enrichmentmainwindow.h"
 #include "enrichments.h"
-#include "../../../include/qwt3d_function.h"
+#include <qwt3d_function.h>
 
 using namespace Qwt3D;
 
--- a/examples/common.pro
+++ b/examples/common.pro
@@ -9,8 +9,13 @@
 linux-g++:QMAKE_CXXFLAGS += -fno-exceptions
 
 unix{
-  unix:LIBS += -lqwtplot3d-qt4
-  INCLUDEPATH    += /usr/include/qwtplot3d-qt4
+  unix:LIBS += -lqwtplot3d-qt$$QT_MAJOR_VERSION
+  greaterThan(QT_MAJOR_VERSION, 4) {
+    INCLUDEPATH    += /usr/include/qwtplot3d
+  }
+  else {
+    INCLUDEPATH    += /usr/include/qwtplot3d-qt4
+  }
 }
 
 DEPENDPATH	= $$INCLUDEPATH
--- a/qwtplot3d.pro
+++ b/qwtplot3d.pro
@@ -1,10 +1,10 @@
 # pro file for building the makefile for qwtplot3d
 #
 
-TARGET            = qwtplot3d-qt$$QT_VERSION
+TARGET            = qwtplot3d-qt$$QT_MAJOR_VERSION
 # Install directives
 INSTALLBASE	  = /usr
-headers.path      = $$INSTALLBASE/include/qwtplot3d-qt$$QT_VERSION
+headers.path      = $$INSTALLBASE/include/qwtplot3d-qt$$QT_MAJOR_VERSION
 headers.files     = $$HEADERS
 target.path       = $$INSTALLBASE/lib
 INSTALLS          = doc headers target