Re: cvs compile error

[Dirk Herrmann <dirk@dirk-herrmanns-seiten.de>]

Han-Wen Nienhuys wrote:

>  dirk@dirk-herrmanns-seiten.de writes:
>
> > Han-Wen Nienhuys wrote:
> >
> >> CVS doesn't compile for me:
> >>
> >> gcc -DHAVE_CONFIG_H -I. -I. -I.. -I.. -I.. -I../libguile-ltdl -g3
> >> -ggdb -DSCM_DEBUG_CELL_ACCESSES=1 -O2 -Wall -Wmissing-prototypes
> >> -Werror -MT eval.lo -MD -MP -MF .deps/eval.Tpo -c eval.c -fPIC
> >> -DPIC -o .libs/eval.o
> >
> > Hmm, works for me, with exactly those options. I am using: gcc
> > (GCC) 3.3.1 (SuSE Linux)
> >
> > What version of gcc are you using?
>
>  Fedora core 2, gcc 3.3.3.
>
>  (I'm trying 3.4 just now to see what happens.)

Where the results on 3.4 different in any way?

Could you please check if the problem could also be solved by the patch 
below?
On my system, again, I don't get any warnings. It would also be nice if 
you could
check whether the patch below brings any performance differences.

Best regards,
Dirk


Index: libguile/deprecated.h
===================================================================
RCS file: /cvsroot/guile/guile/guile-core/libguile/deprecated.h,v
retrieving revision 1.19
diff -u -b -r1.19 deprecated.h
--- libguile/deprecated.h    6 May 2004 16:42:50 -0000    1.19
+++ libguile/deprecated.h    29 May 2004 06:37:25 -0000
@@ -300,11 +300,6 @@
 
 #define SCM_VALIDATE_OPDIR(pos, port) SCM_MAKE_VALIDATE (pos, port, OPDIRP)
 
-/* Deprecated because we can not safely cast a SCM* to a scm_t_bits*
- */
-
-#define SCM_CELL_WORD_LOC(x, n)   
((scm_t_bits*)SCM_CELL_OBJECT_LOC((x),(n)))
-
 void scm_i_init_deprecated (void);
 
 #endif
Index: libguile/gc.h
===================================================================
RCS file: /cvsroot/guile/guile/guile-core/libguile/gc.h,v
retrieving revision 1.117
diff -u -b -r1.117 gc.h
--- libguile/gc.h    26 May 2004 21:15:30 -0000    1.117
+++ libguile/gc.h    29 May 2004 06:37:25 -0000
@@ -36,8 +36,10 @@
 
 typedef struct scm_t_cell
 {
-  SCM word_0;
-  SCM word_1;
+  union {
+    scm_t_bits word;
+    SCM object;
+  } elements[2];
 } scm_t_cell;
 
 /*
@@ -73,12 +75,14 @@
 #define SCM_GC_CARD_N_CELLS        256
 #define SCM_GC_SIZEOF_CARD         SCM_GC_CARD_N_CELLS * sizeof 
(scm_t_cell)
 
-#define SCM_GC_CARD_BVEC(card)  ((scm_t_c_bvec_long *) ((card)->word_0))
+#define SCM_GC_CARD_BVEC(card) \
+  ((scm_t_c_bvec_long *) ((card)->elements[0].word))
 #define SCM_GC_SET_CARD_BVEC(card, bvec) \
-    ((card)->word_0 = (SCM) (bvec))
-#define SCM_GC_GET_CARD_FLAGS(card) ((long) ((card)->word_1))
+  ((card)->elements[0].word = (scm_t_bits) (bvec))
+#define SCM_GC_GET_CARD_FLAGS(card) \
+  ((long) ((card)->elements[1].word))
 #define SCM_GC_SET_CARD_FLAGS(card, flags) \
-    ((card)->word_1 = (SCM) (flags))
+  ((card)->elements[1].word = (flags))
 
 #define SCM_GC_GET_CARD_FLAG(card, shift) \
  (SCM_GC_GET_CARD_FLAGS (card) & (1L << (shift)))
@@ -141,12 +145,13 @@
  * in debug mode.  In particular these macros will even work for free 
cells,
  * which should never be encountered by user code.  */
 
-#define SCM_GC_CELL_OBJECT(x, n) (((SCM *)SCM2PTR (x)) [n])
-#define SCM_GC_CELL_WORD(x, n)   (SCM_UNPACK (SCM_GC_CELL_OBJECT ((x), 
(n))))
+#define SCM_GC_CELL_WORD(x, n) (((SCM2PTR (x))->elements[n]).word)
+#define SCM_GC_CELL_OBJECT(x, n) (((SCM2PTR (x))->elements[n]).object)
 
-#define SCM_GC_SET_CELL_OBJECT(x, n, v) ((((SCM *)SCM2PTR (x)) [n]) = (v))
+#define SCM_GC_SET_CELL_OBJECT(x, n, v) \
+  (((SCM2PTR (x))->elements[n]).object = (v))
 #define SCM_GC_SET_CELL_WORD(x, n, v)  \
-  (SCM_GC_SET_CELL_OBJECT ((x), (n), SCM_PACK (v)))
+  (((SCM2PTR (x))->elements[n]).word = (v))
 
 #define SCM_GC_CELL_TYPE(x) (SCM_GC_CELL_OBJECT ((x), 0))
 
@@ -214,7 +219,8 @@
   (SCM_GC_SET_CELL_OBJECT ((x), 1, (v)))
 
 
-#define SCM_CELL_OBJECT_LOC(x, n) (SCM_VALIDATE_CELL((x), 
&SCM_GC_CELL_OBJECT ((x), (n))))
+#define SCM_CELL_WORD_LOC(x, n)   (&SCM_CELL_WORD ((x), (n)))
+#define SCM_CELL_OBJECT_LOC(x, n) (&SCM_CELL_OBJECT ((x), (n)))
 #define SCM_CARLOC(x)             (SCM_CELL_OBJECT_LOC ((x), 0))
 #define SCM_CDRLOC(x)             (SCM_CELL_OBJECT_LOC ((x), 1))
 
Index: libguile/numbers.h
===================================================================
RCS file: /cvsroot/guile/guile/guile-core/libguile/numbers.h,v
retrieving revision 1.82
diff -u -b -r1.82 numbers.h
--- libguile/numbers.h    15 May 2004 15:50:24 -0000    1.82
+++ libguile/numbers.h    29 May 2004 06:37:25 -0000
@@ -144,7 +144,7 @@
 #define SCM_COMPLEX_IMAG(x) (SCM_COMPLEX_MEM (x)->imag)
 
 /* Each bignum is just an mpz_t stored in a double cell starting at 
word 1. */
-#define SCM_I_BIG_MPZ(x) (*((mpz_t *) (SCM_CELL_OBJECT_LOC((x),1))))
+#define SCM_I_BIG_MPZ(x) (*((mpz_t *) (SCM_CELL_WORD_LOC ((x), 1))))
 #define SCM_BIGP(x) (!SCM_IMP (x) && SCM_TYP16 (x) == scm_tc16_big)
 
 #define SCM_NUMBERP(x) (SCM_INUMP(x) || SCM_NUMP(x))




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