extend FOREIGN_BUILD to include different target/generic

scripts/target_config_lib.lua

@@ -28,9 +28,7 @@ END_MAKE
 	end
 
 	lib.include('generic')
-	if env.FOREIGN_BUILD == '' then
-		lib.include('generic_gluon')
-	end
+	lib.include('generic_' .. env.FOREIGN_BUILD)
 	for pkg in string.gmatch(extra_packages, '%S+') do
 		lib.packages {pkg}
 	end

targets/generic_ffberlin

@@ -0,0 +1,45 @@
+assert(env.GLUON_LANGS)
+
+config('CONFIG_GLUON_SITEDIR="%s"', env.GLUON_SITEDIR)
+config('CONFIG_GLUON_RELEASE="%s"', env.GLUON_RELEASE)
+try_config('CONFIG_GLUON_BRANCH="%s"', env.GLUON_BRANCH or '')
+
+for lang in string.gmatch(env.GLUON_LANGS, '%S+') do
+	try_config('CONFIG_GLUON_WEB_LANG_%s=y', lang)
+end
+
+-- Disable non-default feeds in distfeeds.conf
+config('# CONFIG_FEED_gluon_base is not set')
+
+config '# CONFIG_TARGET_ROOTFS_INITRAMFS is not set'
+
+config 'CONFIG_ALL_NONSHARED=y'
+
+config '# CONFIG_PACKAGE_usbip is not set' -- fails to build
+config '# CONFIG_PACKAGE_kmod-jool is not set' -- fails to build
+
+config 'CONFIG_BUSYBOX_CUSTOM=y'
+config '# CONFIG_BUSYBOX_CONFIG_FEATURE_PREFER_IPV4_ADDRESS is not set'
+
+config 'CONFIG_PACKAGE_ATH_DEBUG=y'
+
+config '# CONFIG_KERNEL_IP_MROUTE is not set'
+config '# CONFIG_KERNEL_IPV6_MROUTE is not set'
+
+try_config 'CONFIG_TARGET_MULTI_PROFILE=y'
+try_config 'CONFIG_TARGET_PER_DEVICE_ROOTFS=y'
+
+if envtrue.GLUON_MULTIDOMAIN then
+	config 'CONFIG_GLUON_MULTIDOMAIN=y'
+end
+
+
+packages {
+	'-odhcpd-ipv6only',
+	'-ppp',
+	'-ppp-mod-pppoe',
+	'-wpad-mini',
+	'-wpad-basic',
+	'gluon-core',
+	'ip6tables',
+}