c-parse.in (cast_expr): Avoid -Wstrict-prototype warnings for unprototyped…

c-parse.in (cast_expr): Avoid -Wstrict-prototype warnings for unprototyped function pointer casts on...

	* c-parse.in (cast_expr): Avoid -Wstrict-prototype warnings for
	unprototyped function pointer casts on integer constants.

From-SVN: r35638

gcc/ChangeLog

+2000-08-11  Kaveh R. Ghazi  <ghazi@caip.rutgers.edu>
+
+	* c-parse.in (cast_expr): Avoid -Wstrict-prototype warnings for
+	unprototyped function pointer casts on integer constants.
+
 2000-08-11 Laurynas Biveinis <lauras@softhome.net>
 
 	* fixproto: Recognize DOS paths with drive letters as absolute paths.

gcc/c-parse.in

@@ -518,7 +518,14 @@ alignof:
 cast_expr:
 	unary_expr
 	| '(' typename ')' cast_expr  %prec UNARY
-		{ tree type = groktypename ($2);
+		{ tree type;
+		  int SAVED_warn_strict_prototypes = warn_strict_prototypes;
+		  /* This avoids warnings about unprototyped casts on
+                     integers.  E.g. "#define SIG_DFL (void(*)())0".  */
+		  if (TREE_CODE ($4) == INTEGER_CST)
+		    warn_strict_prototypes = 0;
+		  type = groktypename ($2);
+		  warn_strict_prototypes = SAVED_warn_strict_prototypes;
 		  $$ = build_c_cast (type, $4); }
 	| '(' typename ')' '{' 
 		{ start_init (NULL_TREE, NULL, 0);