diff -r ca1bf632da51 -r fa8f3ab724f9 config/arch/arm.in
--- a/config/arch/arm.in	Mon Oct 26 09:10:38 2009 +0100
+++ b/config/arch/arm.in	Mon Oct 26 23:11:10 2009 +0100
@@ -38,6 +38,20 @@
 
 endchoice
 
+config ARCH_ARM_INTERWORKING
+    bool
+    prompt "Use Thumb-interworking (READ HELP)"
+    default n
+    depends on EXPERIMENTAL
+    help
+      Excerpt from the gcc manual:
+      
+      > Generate code which supports calling between the ARM and Thumb
+      > instruction sets. Without this option the two instruction sets
+      > cannot be reliably used inside one program. The default is
+      > [not to use interwork], since slightly larger code is generated
+      > when [interwork] is specified.
+
 config ARCH_ARM_EABI
     bool
     prompt "Use EABI"