fs/iso9660: add Grub splashscreen support

When Grub is built with splashscreen support, copy the splashscreen
image to the ISO9660 filesystem. Otherwise, disable the splashscreen
in the grub menu.lst file.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Acked-by: "Yann E. MORIN" <yann.morin.1998@free.fr>

fs/iso9660/iso9660.mk

@@ -16,6 +16,11 @@ $(BINARIES_DIR)/rootfs.iso9660: host-cdrkit host-fakeroot linux rootfs-cpio grub
 	mkdir -p $(ISO9660_TARGET_DIR)/boot/grub
 	cp $(GRUB_DIR)/stage2/stage2_eltorito $(ISO9660_TARGET_DIR)/boot/grub/
 	cp $(ISO9660_BOOT_MENU) $(ISO9660_TARGET_DIR)/boot/grub/menu.lst
+ifeq ($(BR2_TARGET_GRUB_SPLASH),)
+	$(SED) '/^splashimage/d' $(ISO9660_TARGET_DIR)/boot/grub/menu.lst
+else
+	cp boot/grub/splash.xpm.gz $(ISO9660_TARGET_DIR)/
+endif
 	cp $(LINUX_IMAGE_PATH) $(ISO9660_TARGET_DIR)/kernel
 ifeq ($(BR2_TARGET_ROOTFS_INITRAMFS),y)
 	$(SED) '/initrd/d'  $(ISO9660_TARGET_DIR)/boot/grub/menu.lst

fs/iso9660/menu.lst

@@ -1,6 +1,15 @@
 default		0
 timeout		10
-color cyan/blue white/blue
+
+# Used when no splashimage is used
+color 		cyan/blue white/blue
+
+# Gets enabled/disabled depending on Grub support for splashimage
+splashimage	/splash.xpm.gz
+
+# Used when a splashimage is enabled
+foreground 	000000
+background 	cccccc
 
 title		Buildroot ISO9660 image
 kernel		/kernel