Use a simple struct to implement compile time checks for the Lisp_Object type

* configure.in: Rename --enable-use-lisp-union-type to
--enable-check-lisp-object-type and define CHECK_LISP_OBJECT_TYPE
instead of USE_LISP_UNION_TYPE.

* admin/make-emacs: Rename --union-type to --check-lisp-type.  Define
CHECK_LISP_OBJECT_TYPE insted of USE_LISP_UNION_TYPE.
* admin/CPP-DEFINES (DEBUG_LISP_OBJECT_TYPE): Renamed from
USE_LISP_UNION_TYPE.

* src/lisp.h (Lisp_Object) [CHECK_LISP_OBJECT_TYPE]: Define as struct
instead of union.
(XLI, XIL): Define.
(XHASH, XTYPE, XINT, XUINT, make_number, XSET, XPNTR, XUNTAG): Use
them.
* src/emacs.c (gdb_use_struct): Renamed from gdb_use_union.
* src/.gdbinit: Check gdb_use_struct instead of gdb_use_union.
* src/alloc.c (widen_to_Lisp_Object): Removed.
(mark_memory): Use XIL instead of widen_to_Lisp_Object.
* src/frame.c (delete_frame): Remove outdated comment.
* src/w32fns.c (Fw32_register_hot_key): Use XLI instead of checking
USE_LISP_UNION_TYPE.
(Fw32_unregister_hot_key): Likewise.
(Fw32_toggle_lock_key): Likewise.
* src/w32menu.c (add_menu_item): Likewise.
(w32_menu_display_help): Use XIL instead of checking
USE_LISP_UNION_TYPE.
* src/w32heap.c (allocate_heap): Don't check USE_LISP_UNION_TYPE.
(init_heap): Likewise.
* src/w32term.c (w32_read_socket): Update comment.

1 files changed, 7 insertions, 0 deletions

diff --git a/admin/ChangeLog b/admin/ChangeLog
index e425c99b8d0..e3b35906ace 100644
--- a/admin/ChangeLog
+++ b/admin/ChangeLog
@@ -1,3 +1,10 @@
+2012-06-13  Andreas Schwab  <schwab@linux-m68k.org>
+
+        * make-emacs: Rename --union-type to --check-lisp-type.  Define
+        CHECK_LISP_OBJECT_TYPE insted of USE_LISP_UNION_TYPE.
+        * CPP-DEFINES (DEBUG_LISP_OBJECT_TYPE): Renamed from
+        USE_LISP_UNION_TYPE.
+
 2012-06-03  Glenn Morris  <rgm@gnu.org>
 
         * quick-install-emacs (PUBLIC_LIBSRC_SCRIPTS): Remove rcs-checkin.