[Patch] libguile/gc-card.c: A cast does not yield an lvalue

[Matthias Koeppe]

When compiling Guile from CVS HEAD with the Sun Forte C compiler, I
get the error "A cast does not yield an lvalue" when compiling
gc-card.c.

Here is a patch.  (See also the ChangeLog entry of 2001-01-11.) 


Index: libguile/gc.h
===================================================================
RCS file: /cvs/guile/guile-core/libguile/gc.h,v
retrieving revision 1.109
diff -u -r1.109 gc.h
--- libguile/gc.h       29 May 2003 14:39:13 -0000      1.109
+++ libguile/gc.h       18 Jun 2003 06:49:08 -0000
@@ -103,6 +103,7 @@
 #define SCM_GC_CELL_CARD(x)    ((scm_t_cell *) ((long) (x) & 
SCM_GC_CARD_ADDR_MASK))
 #define SCM_GC_CELL_OFFSET(x)  (((long) (x) & SCM_GC_CARD_SIZE_MASK) >> 
SCM_CELL_SIZE_SHIFT)
 #define SCM_GC_CELL_BVEC(x)    SCM_GC_CARD_BVEC (SCM_GC_CELL_CARD (x))
+#define SCM_GC_SET_CELL_BVEC(x, bvec)    SCM_GC_SET_CARD_BVEC 
(SCM_GC_CELL_CARD (x), bvec)
 #define SCM_GC_CELL_GET_BIT(x) SCM_C_BVEC_GET (SCM_GC_CELL_BVEC (x), 
SCM_GC_CELL_OFFSET (x))
 #define SCM_GC_CELL_SET_BIT(x) SCM_C_BVEC_SET (SCM_GC_CELL_BVEC (x), 
SCM_GC_CELL_OFFSET (x))
 #define SCM_GC_CELL_CLEAR_BIT(x) SCM_C_BVEC_CLEAR (SCM_GC_CELL_BVEC (x), 
SCM_GC_CELL_OFFSET (x))
Index: libguile/gc-card.c
===================================================================
RCS file: /cvs/guile/guile-core/libguile/gc-card.c,v
retrieving revision 1.17
diff -u -r1.17 gc-card.c
--- libguile/gc-card.c  4 Jun 2003 05:28:34 -0000       1.17
+++ libguile/gc-card.c  18 Jun 2003 06:49:08 -0000
@@ -308,7 +308,7 @@
   int idx = (card  - seg->bounds[0]) / SCM_GC_CARD_N_CELLS; 
 
   bvec_ptr += idx *SCM_GC_CARD_BVEC_SIZE_IN_LONGS;
-  SCM_GC_CELL_BVEC (card) = bvec_ptr;
+  SCM_GC_SET_CELL_BVEC (card, bvec_ptr);
   
   /*
      ASSUMPTION: n_header_cells <= 2. 



-- 
Matthias Koeppe -- http://www.math.uni-magdeburg.de/~mkoeppe