Using %g1 to pass values across function calls is a bit iffy so make
sure that trying to call _get_g1() results in a linker error.

--- src/spsparc64.d.orig	Mon Mar 24 11:23:28 2008
+++ src/spsparc64.d	Sun Sep 19 15:03:08 2010
@@ -11,16 +11,8 @@
 
         .global getSP
         .global _getSP
-        .global _get_g1
-        .global __get_g1
 
 #    extern void* getSP (void);
 getSP:
 _getSP: retl
        _ mov %sp,%o0
-
-#    extern uint32 _get_g1 (void);
-_get_g1:
-__get_g1: retl
-       _ srl %g1,0,%o0
-