diff -r ca1bf632da51 -r 4baa6a9f6415 scripts/build/arch/arm.sh
--- a/scripts/build/arch/arm.sh	Mon Oct 26 09:10:38 2009 +0100
+++ b/scripts/build/arch/arm.sh	Fri Jan 15 22:21:12 2010 +0100
@@ -20,4 +20,8 @@
 #            CT_ARCH_TARGET_CFLAGS="-mthumb"
             ;;
     esac
+
+    if [ "${CT_ARCH_ARM_INTERWORKING}" = "y" ]; then
+        CT_ARCH_TARGET_CFLAGS+=" -mthumb-interwork"
+    fi
 }