package/imagemagick: host svg support needs host gcc >= 4.8

Due to the harfbuzz bump to version 2.5.2 host SVG support needs host
gcc >= 4.8.

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/imagemagick/Config.in.host

@@ -16,6 +16,7 @@ if BR2_PACKAGE_HOST_IMAGEMAGICK
 
 config BR2_PACKAGE_HOST_IMAGEMAGICK_SVG
 	bool "SVG support"
+	depends on BR2_HOST_GCC_AT_LEAST_4_8 # host-librsvg -> host-pango -> host-harfbuzz
 	help
 	  Say 'y' here is you need ImageMagick tools (like convert)
 	  to support SVG.
@@ -23,4 +24,7 @@ config BR2_PACKAGE_HOST_IMAGEMAGICK_SVG
 	  This is not enabled by default, as it brings quite a few
 	  extra dependencies, and thus extra build time.
 
+comment "SVG support needs host gcc >= 4.8"
+	depends on !BR2_HOST_GCC_AT_LEAST_4_8
+
 endif