--- foo/os_dep.c.orig	2003-06-14 04:11:00.000000000 +0900
+++ foo/os_dep.c	2005-03-16 23:09:22.000000000 +0900
@@ -2137,7 +2137,7 @@
     /* Using vm_protect (mach syscall) over mprotect (BSD syscall) seems to
        decrease the likelihood of some of the problems described below. */
     #include <mach/vm_map.h>
-    extern mach_port_t GC_task_self;
+    static mach_port_t GC_task_self;
     #define PROTECT(addr,len) \
         if(vm_protect(GC_task_self,(vm_address_t)(addr),(vm_size_t)(len), \
                 FALSE,VM_PROT_READ) != KERN_SUCCESS) { \
@@ -3312,8 +3312,6 @@
 
 #define MAX_EXCEPTION_PORTS 16
 
-static mach_port_t GC_task_self;
-
 static struct {
     mach_msg_type_number_t count;
     exception_mask_t      masks[MAX_EXCEPTION_PORTS];