modify ptr_to_globals trick so that we do not violate
type safety (well, sort of ;))
diff --git a/include/libbb.h b/include/libbb.h
index 9ea9f5a..9a6966d 100644
--- a/include/libbb.h
+++ b/include/libbb.h
@@ -806,6 +806,10 @@
#define BUFSIZ 4096
#endif
extern char bb_common_bufsiz1[BUFSIZ+1];
+/* This struct is deliberately not defined. */
+/* See docs/keep_data_small.txt */
+struct globals;
+extern struct globals *ptr_to_globals;
/* You can change LIBBB_DEFAULT_LOGIN_SHELL, but don't use it,
* use bb_default_login_shell and following defines.