ia64 support


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@115 c046a42c-6fe2-441c-8c8c-71466251a162
diff --git a/linux-user/signal.c b/linux-user/signal.c
index 5ed1d85..1f779f9 100644
--- a/linux-user/signal.c
+++ b/linux-user/signal.c
@@ -26,6 +26,13 @@
 #include <errno.h>
 #include <sys/ucontext.h>
 
+#ifdef __ia64__
+#undef uc_mcontext
+#undef uc_sigmask
+#undef uc_stack
+#undef uc_link
+#endif 
+
 #include "qemu.h"
 
 //#define DEBUG_SIGNAL