--- /usr/portage/eclass/toolchain.eclass	2009-12-20 20:07:39.000000000 +0100
+++ /usr/portage/eclass/toolchain.eclass	2010-01-10 19:07:22.000000000 +0100
@@ -1230,6 +1230,16 @@ 
 	fi
 
 	case $(tc-arch) in
+		arm)
+			local arm_arch="${CTARGET%%-*}"
+			# Convert armv7{a,r,m} to armv7-{a,r,m}
+			[[ ! -z "${arm_arch##armv7}" ]] && arm_arch="${arm_arch/armv7/armv7-}"
+			# Remove 'l'
+			[[ -z "${arm_arch##armv*l}" ]] && arch="${arm_arch/l/}"
+			# Remove 'eb'
+			[[ -z "${arm_arch##armv*eb}" ]] && arch="${arm_arch/eb/}"
+			confgcc="${confgcc} --with-arch=${arm_arch}"
+			;;
 		# Add --with-abi flags to set default MIPS ABI
 		mips)
 			local mips_abi=""