arm fixes


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@274 c046a42c-6fe2-441c-8c8c-71466251a162
diff --git a/cpu-all.h b/cpu-all.h
index 3eacfa8..13af7c2 100644
--- a/cpu-all.h
+++ b/cpu-all.h
@@ -305,5 +305,6 @@
 #endif /* SINGLE_CPU_DEFINES */
 
 void cpu_abort(CPUState *env, const char *fmt, ...);
+extern CPUState *cpu_single_env;
 
 #endif /* CPU_ALL_H */