Re: scratch/accurate-warning-pos: Solid progress: the branch now bootstraps.

[Alan Mackenzie <acm@muc.de>]

Hello, Charles.

Thanks for trying this out!

On Sun, Nov 25, 2018 at 12:26:45 +0100, Charles A. Roelli wrote:
> > Date: Fri, 23 Nov 2018 13:09:05 +0000
> > From: Alan Mackenzie <acm@muc.de>
> > 
> > Although the branch works, it has been tested solely on 64-bit
> > GNU/Linux, the only system I have.  This despite some fairly hefty
> > changes in lisp.h.

> "make bootstrap" prints the following errors here on the
> scratch/accurate-warning-pos branch:

>   CC       dispnew.o
> In file included from dispnew.c:27:
> lisp.h: In function ‘SYMBOLP’:
> lisp.h:1052: error: used struct type value where scalar is required
> lisp.h: In function ‘XSYMBOL’:
> lisp.h:1083: error: wrong type argument to unary exclamation mark
> lisp.h: In function ‘EQ’:
> lisp.h:1233: error: used struct type value where scalar is required
> lisp.h:1233: error: invalid operands to binary == (have ‘Lisp_Object’ and ‘Lisp_Object’)
> lisp.h:1233: error: invalid operands to binary == (have ‘Lisp_Object’ and ‘Lisp_Object’)

> (This is macOS with GCC 4.2.1.)

> Seems like the compiler is raising errors when the var
> "Vsymbols_with_pos_enabled" (a Lisp_Object) is used in a true/false
> context.

Yes, indeed.

I hope the following patch will fix it, and hope also there won't be too
many similar bugs to fix.



diff --git a/src/lisp.h b/src/lisp.h
index 4dfd065629..802c9e4259 100644
--- a/src/lisp.h
+++ b/src/lisp.h
@@ -395,7 +395,7 @@ typedef EMACS_INT Lisp_Word;
 
 /* verify (NIL_IS_ZERO) */
 #define lisp_h_EQ(x, y) ((XLI ((x)) == XLI ((y)))       \
-  || (Vsymbols_with_pos_enabled  \
+  || (XLI (Vsymbols_with_pos_enabled)    \
   && (SYMBOL_WITH_POS_P ((x))                        \
       ? BARE_SYMBOL_P ((y))                               \
         ? (XSYMBOL_WITH_POS((x)))->sym == (y)          \
@@ -424,7 +424,7 @@ typedef EMACS_INT Lisp_Word;
 #define lisp_h_BARE_SYMBOL_P(x) TAGGEDP ((x), Lisp_Symbol)
 /* verify (NIL_IS_ZERO) */
 #define lisp_h_SYMBOLP(x) ((BARE_SYMBOL_P ((x)) ||               \
-                            (Vsymbols_with_pos_enabled && (SYMBOL_WITH_POS_P ((x))))))
+                            (XLI (Vsymbols_with_pos_enabled) && (SYMBOL_WITH_POS_P ((x))))))
 #define lisp_h_TAGGEDP(a, tag) \
    (! (((unsigned) (XLI (a) >> (USE_LSB_TAG ? 0 : VALBITS)) \
 	- (unsigned) (tag)) \
@@ -463,7 +463,7 @@ typedef EMACS_INT Lisp_Word;
 /* verify (NIL_IS_ZERO) */
 # define lisp_h_XSYMBOL(a)                      \
      (eassert (SYMBOLP ((a))),                      \
-      (!Vsymbols_with_pos_enabled                \
+      (!XLI (Vsymbols_with_pos_enabled)             \
       ? (XBARE_SYMBOL ((a)))             \
        : (BARE_SYMBOL_P ((a)))           \
       ? (XBARE_SYMBOL ((a)))                                    \


-- 
Alan Mackenzie (Nuremberg, Germany).