Re: make bootstrap fails with newest CVS sources - 2002-11-25

[Steven Tamm <steventamm@mac.com>]

In fns.c:Frequire I changed:

       if (nesting > 2)
	error ("Recursive `require' for feature `%s'",
	       SDATA (SYMBOL_NAME (feature)));

to:

       if (nesting > 3)
	error ("Recursive `require' for feature `%s'",
	       SDATA (SYMBOL_NAME (feature)));

This makes the recursive load die in lread.c:Fload (which produces the 
nicer error).  Fload fails if it tries to load the same file more than 
3 times.

I found this out totally by accident.  On darwin/Mac OS X, there is a 
problem with the apple-hacked GCC that it doesn't seem to export the 
structure definitions for Lisp_String and Lisp_Object because of the 
name conflict with the Lisp_Type enum.   So the gdb macros like xsymbol 
didn't work.   After I figured that out I just thought that the problem 
might go away if I allowed more nesting.  I was wrong.

BTW, To get the Lisp_String etc. structures to be loaded correctly into 
gdb on darwin all I did was add this to emacs.c

typedef Lisp_Object XLisp_Object;
typedef struct Lisp_String XLisp_String;
typedef struct Lisp_Symbol XLisp_Symbol;
typedef struct Lisp_Cons   XLisp_Cons;
XLisp_Object dummy1;
XLisp_String dummy2;
XLisp_Symbol dummy3;
XLisp_Cons dummy4;

Do any other platforms have the same problem, or is there some flag I 
can use to make this go away?
-Steven

On Tuesday, November 26, 2002, at 05:49  AM, Ben Key wrote:

>     There appears to be a recursive load (I turned up the recursion 
> check
>     from 2 to 3 in fns.c) to get it to fail in lread.
>
>     Recursive load: "/dev/emacs/lisp/emacs-lisp/cl-macs.el",
>     "/dev/emacs/lisp/button.el", "/dev/emacs/lisp/help-mode.el",
>     "/dev/emacs/lisp/help-fns.el", 
> "/dev/emacs/lisp/emacs-lisp/cl-macs.el",
>     "/dev/emacs/lisp/button.el", "/dev/emacs/lisp/help-mode.el",
>     "/dev/emacs/lisp/help-fns.el", 
> "/dev/emacs/lisp/emacs-lisp/cl-macs.el",
>     "/dev/emacs/lisp/button.el", "/dev/emacs/lisp/help-mode.el",
>     "/dev/emacs/lisp/help-fns.el", 
> "/dev/emacs/lisp/emacs-lisp/cl-macs.el",
>     "/dev/emacs/lisp/button.el", "/dev/emacs/lisp/help-mode.el",
>     "/dev/emacs/lisp/help-fns.el", 
> "/dev/emacs/lisp/emacs-lisp/cl-macs.el",
>     "/dev/emacs/lisp/faces.el", "/dev/emacs/lisp/loadup.el"
>
>     The chain appears to be cl-macs -> help-fns -> help-mode -> button 
> ->
>     cl-macs
>
> How did you get this information?  What did you have to change / 
> enable in
> order to get such a detailed report?  I spent quite some time 
> searching for
> a way to do something similar so I could provide more information when 
> I
> reported the problem, but I failed to find anything.