Testing to see if I can rename a file without blanking its history.

That'd be dalias' suggestion..

Mine was #define isdigit(a) (a>='0'&&a<='9'), but i forgot to record the
exact savings..
   text    data     bss     dec     hex filename
 864252   10252  645860 1520364  1732ec busybox_old
 863714   10244  645892 1519850  1730ea busybox_unstripped


Index: include/libbb.h
===================================================================
--- include/libbb.h	(revision 15244)
+++ include/libbb.h	(working copy)
@@ -531,4 +531,10 @@
 #include <dmalloc.h>
 #endif
 
+#if 1
+#include <ctype.h>
+#define _CTYPE_H 1 /* muahahaha */
+#undef isdigit
+#define isdigit(a) ((unsigned)(a)-'0' < 10)
+#endif
 #endif /* __LIBBUSYBOX_H__ */