not like something to be declared both extern and static, and it is
declared extern in object.h, included here.
/* -*-C-*-
-$Header: /Users/cph/tmp/foo/mit-scheme/mit-scheme/v7/src/microcode/Attic/psbmap.h,v 9.30 1989/09/22 08:45:36 cph Exp $
+$Header: /Users/cph/tmp/foo/mit-scheme/mit-scheme/v7/src/microcode/Attic/psbmap.h,v 9.31 1989/10/20 04:44:00 jinx Exp $
Copyright (c) 1987, 1988, 1989 Massachusetts Institute of Technology
/* Global data */
#ifndef Heap_In_Low_Memory
-static SCHEME_OBJECT * memory_base;
+SCHEME_OBJECT * memory_base;
#endif
static long
/* -*-C-*-
-$Header: /Users/cph/tmp/foo/mit-scheme/mit-scheme/v8/src/microcode/psbmap.h,v 9.30 1989/09/22 08:45:36 cph Exp $
+$Header: /Users/cph/tmp/foo/mit-scheme/mit-scheme/v8/src/microcode/psbmap.h,v 9.31 1989/10/20 04:44:00 jinx Exp $
Copyright (c) 1987, 1988, 1989 Massachusetts Institute of Technology
/* Global data */
#ifndef Heap_In_Low_Memory
-static SCHEME_OBJECT * memory_base;
+SCHEME_OBJECT * memory_base;
#endif
static long