package/cegui: fix selecting the default OpenGL renderer

According to the cegui requirements select explicitly the default
OpenGL renderer based on available dependencies.

Signed-off-by: Bartosz Bilas <b.bilas@grinn-global.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/cegui/Config.in

@@ -9,6 +9,7 @@ config BR2_PACKAGE_CEGUI
 	depends on BR2_TOOLCHAIN_HAS_THREADS
 	depends on BR2_USE_WCHAR
 	select BR2_PACKAGE_GLM
+	select BR2_PACKAGE_LIBGLFW if BR2_PACKAGE_HAS_LIBGL # SampleBrowser dependency
 	select BR2_PACKAGE_LIBICONV if !BR2_ENABLE_LOCALE
 	help
 	  Crazy Eddie's GUI System is a free library providing windowing

package/cegui/cegui.mk

@@ -16,15 +16,24 @@ CEGUI_DEPENDENCIES = glm \
 		$(if $(BR2_PACKAGE_LIBGLFW),libglfw) \
 		$(if $(BR2_PACKAGE_HAS_LIBGL),libgl) \
 		$(if $(BR2_PACKAGE_HAS_LIBGLES),libgles) \
-		$(if $(BR2_PACKAGE_LIBGLEW),libglew) \
 		$(if $(BR2_PACKAGE_LIBICONV),libiconv)
 
 # libepoxy support cannot be enabled together with libglew
-ifeq ($(BR2_PACKAGE_LIBEPOXY):$(BR2_PACKAGE_LIBGLEW),y:)
+ifeq ($(BR2_PACKAGE_LIBGLEW)$(BR2_PACKAGE_LIBGLU),yy)
+CEGUI_DEPENDENCIES += libglew libglu
+CEGUI_CONF_OPTS += -DCEGUI_USE_GLEW=ON -DCEGUI_USE_EPOXY=OFF \
+	-DCEGUI_BUILD_RENDERER_OPENGL=ON \
+	-DCEGUI_BUILD_RENDERER_OPENGL3=ON
+else ifeq ($(BR2_PACKAGE_LIBEPOXY),y)
 CEGUI_DEPENDENCIES += libepoxy
-CEGUI_CONF_OPTS += -DCEGUI_USE_EPOXY=ON
+# old OpenGL renderer module is only supported using GLEW
+CEGUI_CONF_OPTS += -DCEGUI_USE_EPOXY=ON -DCEGUI_USE_GLEW=OFF \
+	-DCEGUI_BUILD_RENDERER_OPENGL=OFF \
+	-DCEGUI_BUILD_RENDERER_OPENGL3=ON
 else
-CEGUI_CONF_OPTS += -DCEGUI_USE_EPOXY=OFF
+CEGUI_CONF_OPTS += -DCEGUI_USE_EPOXY=OFF -DCEGUI_USE_GLEW=OFF \
+	-DCEGUI_BUILD_RENDERER_OPENGL=OFF \
+	-DCEGUI_BUILD_RENDERER_OPENGL3=OFF
 endif
 
 ifeq ($(BR2_PACKAGE_EXPAT),y)