package/octave: add optional {Graphics, Image}Magick++ support

Signed-off-by: Julien Olivain <ju.o@free.fr>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
(cherry picked from commit 9f39676bdbd4936669a128c544ade514b3afef6a)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/octave/octave.mk

@@ -26,6 +26,16 @@ else
 OCTAVE_CONF_OPTS += --without-bz2
 endif
 
+ifeq ($(BR2_PACKAGE_GRAPHICSMAGICK),y)
+OCTAVE_CONF_OPTS += --with-magick=GraphicsMagick++
+OCTAVE_DEPENDENCIES += graphicsmagick
+else ifeq ($(BR2_PACKAGE_IMAGEMAGICK),y)
+OCTAVE_CONF_OPTS += --with-magick=ImageMagick++
+OCTAVE_DEPENDENCIES += imagemagick
+else
+OCTAVE_CONF_OPTS += --without-magick
+endif
+
 ifeq ($(BR2_PACKAGE_READLINE),y)
 OCTAVE_CONF_OPTS += \
 	--enable-readline \