package/qwt: add support for Qt5.

This version of Qwt is compatible with both Qt and Qt5. This patch
adds the option to compile it for Qt5.

Signed-off-by: David Picard <davepiq@yahoo.fr>
[Thomas: slightly adjust the OpenGL dependencies.]
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/qwt/Config.in

@@ -1,7 +1,9 @@
 config BR2_PACKAGE_QWT
 	bool "qwt"
-	depends on BR2_PACKAGE_QT
+	depends on BR2_PACKAGE_QT || BR2_PACKAGE_QT5
 	select BR2_PACKAGE_QT_GUI_MODULE if BR2_PACKAGE_QT
+	select BR2_PACKAGE_QT5BASE_GUI if BR2_PACKAGE_QT5
+	select BR2_PACKAGE_QT5BASE_CONCURRENT if BR2_PACKAGE_QT5
 	help
 	  Qwt is a graphics extension to the Qt GUI application
 	  framework. It provides a 2D plotting widget and more.
@@ -13,14 +15,16 @@ if BR2_PACKAGE_QWT
 config BR2_PACKAGE_QWT_SVG
 	bool "SVG support"
 	select BR2_PACKAGE_QT_SVG if BR2_PACKAGE_QT
+	select BR2_PACKAGE_QT5SVG if BR2_PACKAGE_QT5
 
 config BR2_PACKAGE_QWT_MATHML
 	bool "MathML support"
 
 config BR2_PACKAGE_QWT_OPENGL
 	bool "OpenGL support"
-	depends on BR2_PACKAGE_HAS_LIBGLES
-	depends on BR2_PACKAGE_HAS_LIBEGL
+	depends on (BR2_PACKAGE_HAS_LIBGLES && BR2_PACKAGE_HAS_LIBEG && BR2_PACKAGE_QT) || \
+		(BR2_PACKAGE_QT5_GL_AVAILABLE && BR2_PACKAGE_QT5)
 	select BR2_PACKAGE_QT_OPENGL_ES if BR2_PACKAGE_QT
+	select BR2_PACKAGE_QT5BASE_OPENGL_LIB if BR2_PACKAGE_QT5
 
 endif

package/qwt/qwt.mk

@@ -11,6 +11,9 @@ QWT_INSTALL_STAGING = YES
 ifeq ($(BR2_PACKAGE_QT),y)
 QWT_DEPENDENCIES = qt
 QWT_QMAKE = $(QT_QMAKE)
+else ifeq ($(BR2_PACKAGE_QT5),y)
+QWT_DEPENDENCIES += qt5
+QWT_QMAKE = $(QT5_QMAKE)
 endif
 
 QWT_LICENSE = LGPLv2.1 with exceptions