--- autoconf-2.57/lib/autoconf/c.m4.vns	2002-12-03 09:59:53 +0300
+++ autoconf-2.57/lib/autoconf/c.m4	2003-08-31 23:33:16 +0400
@@ -1033,10 +1033,11 @@
   p = (char**) ccp;
   ccp = (char const *const *) p;
   { /* SCO 3.2v4 cc rejects this.  */
-    char *t;
+    char *t = (char *)0; /* removes 'used unitialized' warning */
     char const *s = 0 ? (char *) 0 : (char const *) 0;
 
     *t++ = 0;
+    (void)s; /* this removes 'unused var' warning */
   }
   { /* Someone thinks the Sun supposedly-ANSI compiler will reject this.  */
     int x[] = {25, 17};
@@ -1051,11 +1052,14 @@
   { /* AIX XL C 1.02.0.0 rejects this saying
        "k.c", line 2.27: 1506-025 (S) Operand must be a modifiable lvalue. */
     struct s { int j; const int *ap[3]; };
-    struct s *b; b->j = 5;
+    struct s *b = (struct s *)0; b->j = 5;
   }
   { /* ULTRIX-32 V3.1 (Rev 9) vcc rejects this */
     const int foo = 10;
+    (void)foo; /* this removes 'unused var' warning */
   }
+  (void)x; /* this removes 'unused var' warning */
+  (void)zero; /* this removes 'unused var' warning */
 #endif
 ]])],
                    [ac_cv_c_const=yes],