package: create virtual package for libGLES, libOpenVG and libEGL

Those acceleration libraries typically have multiple implementations:
some are free (Mesa), some are proprietary (generally SoC specific).

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

package/Config.in

@@ -435,6 +435,7 @@ source "package/librsvg/Config.in"
 source "package/libsvgtiny/Config.in"
 source "package/libungif/Config.in"
 source "package/opencv/Config.in"
+source "package/opengl/Config.in"
 source "package/pango/Config.in"
 source "package/pixman/Config.in"
 source "package/tiff/Config.in"

package/opengl/Config.in

@@ -0,0 +1,8 @@
+config BR2_PACKAGE_HAS_OPENGL_EGL
+	bool
+
+config BR2_PACKAGE_HAS_OPENGL_ES
+	bool
+
+config BR2_PACKAGE_HAS_OPENVG
+	bool

package/opengl/libegl/libegl.mk

@@ -0,0 +1,16 @@
+#############################################################
+#
+# Virtual package for libEGL
+#
+#############################################################
+
+LIBEGL_SOURCE =
+
+ifeq ($(LIBEGL_DEPENDENCIES),y)
+define LIBEGL_CONFIGURE_CMDS
+	echo "No libEGL implementation selected. Configuration error."
+	exit 1
+endef
+endif
+
+$(eval $(generic-package))

package/opengl/libgles/libgles.mk

@@ -0,0 +1,16 @@
+#############################################################
+#
+# Virtual package for libGLES
+#
+#############################################################
+
+LIBGLES_SOURCE =
+
+ifeq ($(LIBGLES_DEPENDENCIES),y)
+define LIBGLES_CONFIGURE_CMDS
+	echo "No libGLES implementation selected. Configuration error."
+	exit 1
+endef
+endif
+
+$(eval $(generic-package))

package/opengl/libopenvg/libopenvg.mk

@@ -0,0 +1,16 @@
+#############################################################
+#
+# Virtual package for libOpenVG
+#
+#############################################################
+
+LIBOPENVG_SOURCE =
+
+ifeq ($(LIBOPENVG_DEPENDENCIES),y)
+define LIBOPENVG_CONFIGURE_CMDS
+	echo "No libOpenVG implementation selected. Configuration error."
+	exit 1
+endef
+endif
+
+$(eval $(generic-package))

package/opengl/opengl.mk

@@ -0,0 +1 @@
+include package/opengl/*/*.mk