Port to 32-bit --with-wide-int

Prefer symbol indexes to struct Lisp_Symbol * casted and then
widened, as the latter had trouble with GCC on Fedora 21 when
configured --with-wide-int and when used in static initializers.
* lib-src/make-docfile.c (write_globals): Define and use symbols like
iQnil (a small integer, like 0) rather than aQnil (an address
constant).
* src/alloc.c (garbage_collect_1, which_symbols):
* src/lread.c (init_obarray):
Prefer builtin_lisp_symbol when it can be used.
* src/dispextern.h (struct image_type.type):
* src/font.c (font_property_table.key):
* src/frame.c (struct frame_parm_table.sym):
* src/keyboard.c (scroll_bar_parts, struct event_head):
* src/xdisp.c (struct props.name):
Use the index of a builtin symbol rather than its address.
All uses changed.
* src/lisp.h (TAG_SYMPTR, XSYMBOL_INIT): Remove, replacing with ...
(TAG_SYMOFFSET, SYMBOL_INDEX): ... new macros that deal with
symbol indexes rather than pointers, and which work better on MSB
hosts because they shift right before tagging.  All uses changed.
(DEFINE_LISP_SYMBOL_BEGIN, DEFINE_LISP_SYMBOL_END):
No longer noops on wide-int hosts, since they work now.
(builtin_lisp_symbol): New function.

1 files changed, 22 insertions, 0 deletions

diff --git a/src/ChangeLog b/src/ChangeLog
index 39775eb675c..14d582d57ec 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,5 +1,27 @@
 2015-01-10  Paul Eggert  <eggert@cs.ucla.edu>
 
+        Port to 32-bit --with-wide-int
+        Prefer symbol indexes to struct Lisp_Symbol * casted and then
+        widened, as the latter had trouble with GCC on Fedora 21 when
+        configured --with-wide-int and when used in static initializers.
+        * alloc.c (garbage_collect_1, which_symbols):
+        * lread.c (init_obarray):
+        Prefer builtin_lisp_symbol when it can be used.
+        * dispextern.h (struct image_type.type):
+        * font.c (font_property_table.key):
+        * frame.c (struct frame_parm_table.sym):
+        * keyboard.c (scroll_bar_parts, struct event_head):
+        * xdisp.c (struct props.name):
+        Use the index of a builtin symbol rather than its address.
+        All uses changed.
+        * lisp.h (TAG_SYMPTR, XSYMBOL_INIT): Remove, replacing with ...
+        (TAG_SYMOFFSET, SYMBOL_INDEX): ... new macros that deal with
+        symbol indexes rather than pointers, and which work better on MSB
+        hosts because they shift right before tagging.  All uses changed.
+        (DEFINE_LISP_SYMBOL_BEGIN, DEFINE_LISP_SYMBOL_END):
+        No longer noops on wide-int hosts, since they work now.
+        (builtin_lisp_symbol): New function.
+
         Port to HAVE_FREETYPE && !HAVE_XFT
         * dispextern.h (struct face.extra) [HAVE_FREETYPE && !HAVE_XFT]:
         * font.h (syms_of_xftfont) [HAVE_FREETYPE && !HAVE_XFT]: