package/libgtk3: needs gcc & host gcc >= 4.8

Due to the harfbuzz bump to version 2.5.2 we need gcc >= 4.8 and host
gcc >= 4.8.

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

package/libgtk3/Config.in

@@ -1,7 +1,9 @@
-comment "libgtk3 needs a toolchain w/ wchar, threads, C++"
+comment "libgtk3 needs a toolchain w/ wchar, threads, C++, gcc >= 4.8, host gcc >= 4.8"
 	depends on BR2_USE_MMU
 	depends on BR2_TOOLCHAIN_HAS_SYNC_4
 	depends on !BR2_USE_WCHAR || !BR2_INSTALL_LIBSTDCPP || \
+		!BR2_TOOLCHAIN_GCC_AT_LEAST_4_8 || \
+		!BR2_HOST_GCC_AT_LEAST_4_8 || \
 		!BR2_TOOLCHAIN_HAS_THREADS
 
 comment "libgtk3 needs an OpenGL or an OpenGL-EGL/wayland backend"
@@ -17,6 +19,9 @@ config BR2_PACKAGE_LIBGTK3
 	depends on BR2_USE_MMU # glib2
 	depends on BR2_INSTALL_LIBSTDCPP # pango
 	depends on BR2_TOOLCHAIN_HAS_SYNC_4 # pango -> harfbuzz
+	depends on BR2_TOOLCHAIN_GCC_AT_LEAST_4_8 # pango -> harfbuzz
+	# host-libgtk3 -> host-librsvg -> host-pango -> host-harfbuzz
+	depends on BR2_HOST_GCC_AT_LEAST_4_8
 	depends on BR2_PACKAGE_HAS_LIBEGL_WAYLAND || \
 		BR2_PACKAGE_HAS_LIBGL
 	select BR2_PACKAGE_ATK