Handle mips-unknown-linux-gnu

config.sub

@@ -389,6 +389,14 @@ case $basic_machine in
 	miniframe)
 		basic_machine=m68000-convergent
 		;;
+	mipsel*-linux*)
+		basic_machine=mipsel-unknown
+		os=-linux
+		;;
+	mips*-linux*)
+		basic_machine=mips-unknown
+		os=-linux
+		;;
 	mips3*-*)
 		basic_machine=`echo $basic_machine | sed -e 's/mips3/mips64/'`
 		;;
@@ -607,7 +615,11 @@ case $basic_machine in
 # Here we handle the default manufacturer of certain CPU types.  It is in
 # some cases the only manufacturer, in others, it is the most popular.
 	mips)
+		if [ x$os = x-linux ]; then
+			basic_machine=mips-unknown
+		else
 			basic_machine=mips-mips
+		fi
 		;;
 	romp)
 		basic_machine=romp-ibm