packages: improve dependency check in virtual packages.

The current version of dependency check for virtual package <foo>
defines FOO_CONFIGURE_CMDS to print an error message if the
dependencies are not met.

This patch updates all the virtual packages to use the GNU Make control
function $(error text...) instead.

This makes the error happen at the beginning of the build, with a clearer
message.

Signed-off-by: Eric Le Bihan <eric.le.bihan.dev@free.fr>
Reviewed-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Reviewed-by: Samuel Martin <s.martin49@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/luainterpreter/luainterpreter.mk

@@ -9,4 +9,10 @@ LUAINTERPRETER_DEPENDENCIES = $(call qstrip,$(BR2_PACKAGE_PROVIDES_LUA_INTERPRET
 
 LUAINTERPRETER_ABIVER = $(call qstrip,$(BR2_PACKAGE_LUAINTERPRETER_ABI_VERSION))
 
+ifeq ($(BR2_PACKAGE_HAS_LUA_INTERPRETER),y)
+ifeq ($(LUAINTERPRETER_DEPENDENCIES),)
+$(error No lua interpreter implementation selected. Configuration error.)
+endif
+endif
+
 $(eval $(generic-package))

package/opengl/libegl/libegl.mk

@@ -7,11 +7,10 @@
 LIBEGL_SOURCE =
 LIBEGL_DEPENDENCIES = $(call qstrip,$(BR2_PACKAGE_PROVIDES_OPENGL_EGL))
 
+ifeq ($(BR2_PACKAGE_HAS_OPENGL_EGL),y)
 ifeq ($(LIBEGL_DEPENDENCIES),)
-define LIBEGL_CONFIGURE_CMDS
-	echo "No libEGL implementation selected. Configuration error."
-	exit 1
-endef
+$(error No libEGL implementation selected. Configuration error.)
+endif
 endif
 
 $(eval $(generic-package))

package/opengl/libgles/libgles.mk

@@ -7,11 +7,10 @@
 LIBGLES_SOURCE =
 LIBGLES_DEPENDENCIES = $(call qstrip,$(BR2_PACKAGE_PROVIDES_OPENGL_ES))
 
+ifeq ($(BR2_PACKAGE_HAS_OPENGL_ES),y)
 ifeq ($(LIBGLES_DEPENDENCIES),)
-define LIBGLES_CONFIGURE_CMDS
-	echo "No libGLES implementation selected. Configuration error."
-	exit 1
-endef
+$(error No libGLES implementation selected. Configuration error.)
+endif
 endif
 
 $(eval $(generic-package))

package/opengl/libopenmax/libopenmax.mk

@@ -7,11 +7,10 @@
 LIBOPENMAX_SOURCE =
 LIBOPENMAX_DEPENDENCIES = $(call qstrip,$(BR2_PACKAGE_PROVIDES_OPENMAX))
 
+ifeq ($(BR2_PACKAGE_HAS_OPENMAX),y)
 ifeq ($(LIBOPENMAX_DEPENDENCIES),)
-define LIBOPENMAX_CONFIGURE_CMDS
-	echo "No libopenmax implementation selected. Configuration error."
-	exit 1
-endef
+$(error No libopenmax implementation selected. Configuration error.)
+endif
 endif
 
 $(eval $(generic-package))

package/opengl/libopenvg/libopenvg.mk

@@ -7,11 +7,10 @@
 LIBOPENVG_SOURCE =
 LIBOPENVG_DEPENDENCIES = $(call qstrip,$(BR2_PACKAGE_PROVIDES_OPENVG))
 
+ifeq ($(BR2_PACKAGE_HAS_OPENVG),y)
 ifeq ($(LIBOPENVG_DEPENDENCIES),)
-define LIBOPENVG_CONFIGURE_CMDS
-	echo "No libOpenVG implementation selected. Configuration error."
-	exit 1
-endef
+$(error No libOpenVG implementation selected. Configuration error.)
+endif
 endif
 
 $(eval $(generic-package))

package/powervr/powervr.mk

@@ -7,11 +7,10 @@
 POWERVR_SOURCE =
 POWERVR_DEPENDENCIES = $(call qstrip,$(BR2_PACKAGE_PROVIDES_POWERVR))
 
+ifeq ($(BR2_PACKAGE_HAS_POWERVR),y)
 ifeq ($(POWERVR_DEPENDENCIES),)
-define POWERVR_CONFIGURE_CMDS
-	echo "No PowerVR implementation selected. Configuration error."
-	exit 1
-endef
+$(error No PowerVR implementation selected. Configuration error.)
+endif
 endif
 
 $(eval $(generic-package))