Add: [Win32] Uniscribe configure options for MinGW targets.

config.lib

@@ -88,6 +88,7 @@ set_default() {
 	with_icu_layout="1"
 	with_icu_sort="1"
 	static_icu="0"
+	with_uniscribe="1"
 	with_threads="1"
 	with_distcc="1"
 	with_ccache="1"
@@ -164,6 +165,7 @@ set_default() {
 		with_icu_layout
 		with_icu_sort
 		static_icu
+		with_uniscribe
 		with_threads
 		with_distcc
 		with_ccache
@@ -401,6 +403,10 @@ detect_params() {
 			--static-libicu)              static_icu="1";;
 			--static-libicu=*)            static_icu="$optarg";;
 
+			--with-uniscribe)             with_uniscribe="2";;
+			--without-uniscribe)          with_uniscribe="0";;
+			--with-uniscribe=*)           with_uniscribe="$optarg";;
+
 			--disable-builtin-depend)     enable_builtin_depend="0";;
 			--enable-builtin-depend)      enable_builtin_depend="2";;
 			--enable-builtin-depend=*)    enable_builtin_depend="$optarg";;
@@ -855,6 +861,28 @@ check_params() {
 		fi
 	fi
 
+	if [ "$with_uniscribe" != "0" ]; then
+		if [ "$os" != "MINGW" ]; then
+			if [ "$with_uniscribe" != "1" ]; then
+				log 1 "configure: error: Uniscribe is only supported on native Win32 targets"
+				exit 1
+			fi
+			with_uniscribe="0"
+
+			log 1 "checking Uniscribe text layout... not Windows, skipping"
+		else
+			log 1 "checking Uniscribe text layout... found"
+
+			# Don't use ICU unless forced.
+			if [ "$with_icu_layout" = "1" ]; then
+				with_icu_layout="0"
+			fi
+			if [ "$with_icu_sort" = "1" ]; then
+				with_icu_sort="0"
+			fi
+		fi
+	fi
+
 	detect_xdg_basedir
 	detect_png
 	detect_freetype
@@ -1781,6 +1809,10 @@ make_cflags_and_ldflags() {
 		fi
 	fi
 
+	if [ "$with_uniscribe" != "0" ]; then
+		CFLAGS="$CFLAGS -DWITH_UNISCRIBE"
+		LIBS="$LIBS -lusp10"
+	fi
 
 	if [ "$with_direct_music" != "0" ]; then
 		CFLAGS="$CFLAGS -DWIN32_ENABLE_DIRECTMUSIC_SUPPORT"