Simplify redefinition of 'abort' (Bug#12316).

Do not try to redefine the 'abort' function.  Instead, redo
the code so that it calls 'emacs_abort' rather than 'abort'.
This removes the need for the NO_ABORT configure-time macro
and makes it easier to change the abort code to do a backtrace.
* configure.ac (NO_ABRT): Remove.
* admin/CPP-DEFINES (NO_ABORT): Remove.
* nt/inc/ms-w32.h (w32_abort) [HAVE_NTGUI]: Remove.
* src/.gdbinit: Just stop at emacs_abort, not at w32_abort or abort.
* src/emacs.c (abort) [!DOS_NT && !NO_ABORT]:
Remove; sysdep.c's emacs_abort now takes its place.
* src/lisp.h (emacs_abort): New decl.  All calls from Emacs code to
'abort' changed to use 'emacs_abort'.
* src/msdos.c (dos_abort) [defined abort]: Remove; not used.
(abort) [!defined abort]: Rename to ...
(emacs_abort): ... new name.
* src/sysdep.c (emacs_abort) [!HAVE_NTGUI]: New function, taking
the place of the old 'abort' in emacs.c.
* src/w32.c, src/w32fns.c (abort): Do not #undef.
* src/w32.c (emacs_abort): Rename from w32_abort.

1 files changed, 4 insertions, 4 deletions

diff --git a/src/widget.c b/src/widget.c
index ea9bdb61b13..9eaf6d1df6a 100644
--- a/src/widget.c
+++ b/src/widget.c
@@ -226,7 +226,7 @@ get_wm_shell (Widget w)
 static void
 mark_shell_size_user_specified (Widget wmshell)
 {
-  if (! XtIsWMShell (wmshell)) abort ();
+  if (! XtIsWMShell (wmshell)) emacs_abort ();
   /* This is kind of sleazy, but I can't see how else to tell it to make it
      mark the WM_SIZE_HINTS size as user specified when appropriate. */
   ((WMShellWidget) wmshell)->wm.size_hints.flags |= USSize;
@@ -290,7 +290,7 @@ set_frame_size (EmacsFrame ew)
   Widget wmshell = get_wm_shell ((Widget) ew);
   /* Each Emacs shell is now independent and top-level.  */
 
-  if (! XtIsSubclass (wmshell, shellWidgetClass)) abort ();
+  if (! XtIsSubclass (wmshell, shellWidgetClass)) emacs_abort ();
 
   /* We don't need this for the moment. The geometry is computed in
      xfns.c.  */
@@ -677,8 +677,8 @@ EmacsFrameDestroy (Widget widget)
   EmacsFrame ew = (EmacsFrame) widget;
   struct frame* s = ew->emacs_frame.frame;
 
-  if (! s) abort ();
-  if (! s->output_data.x) abort ();
+  if (! s) emacs_abort ();
+  if (! s->output_data.x) emacs_abort ();
 
   BLOCK_INPUT;
   x_free_gcs (s);