package/gdal: add xz optional dependency

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/gdal/gdal.mk

@@ -67,7 +67,6 @@ GDAL_CONF_OPTS = \
 	-DGDAL_USE_KDU=OFF \
 	-DGDAL_USE_KEA=OFF \
 	-DGDAL_USE_LERC=OFF \
-	-DGDAL_USE_LIBLZMA=OFF \
 	-DGDAL_USE_DEFLATE=OFF \
 	-DGDAL_USE_MONGOCXX=OFF \
 	-DGDAL_USE_MRSID=OFF \
@@ -139,4 +138,11 @@ else
 GDAL_CONF_OPTS += -DGDAL_USE_SQLITE3=OFF
 endif
 
+ifeq ($(BR2_PACKAGE_XZ),y)
+GDAL_DEPENDENCIES += xz
+GDAL_CONF_OPTS += -DGDAL_USE_LIBLZMA=ON
+else
+GDAL_CONF_OPTS += -DGDAL_USE_LIBLZMA=OFF
+endif
+
 $(eval $(cmake-package))