introduced a GCC-like -Werror=type

* src/complain.h : errors_flag variable
* src/complain.c : actual stuff happens here
* src/conflits.c : differentiated SR and RR conflicts
* src/getargs.c : flags_argmatch recognizes the new -Werror format

src/complain.h

@@ -35,16 +35,23 @@ typedef enum
     Wdeprecated       = 1 << 4,  /**< Obsolete constructs.  */
     Wother            = 1 << 5,  /**< All other warnings.  */
 
+    /* Deprecated, this option now uses a second instance of this enum */
     Werror            = 1 << 10, /**< Warnings are treated as errors.  */
+
     complaint         = 1 << 11, /**< All complaints.  */
     fatal             = 1 << 12, /**< All fatal errors.  */
     silent            = 1 << 13, /**< Do not display the warning type.  */
-    Wall              = ~Werror  /**< All above warnings.  */
+
+    /**< All above warnings.  */
+    Wall              = ~complaint & ~fatal & ~silent 
   } warnings;
 
 /** What warnings are issued.  */
 extern warnings warnings_flag;
 
+/** What warnings are made errors.  */
+extern warnings errors_flag;
+
 /** Display a "[-Wyacc]" like message on stderr.  */
 void warnings_print_categories (warnings warn_flags);
 
@@ -53,7 +60,7 @@ void warnings_print_categories (warnings warn_flags);
     only for the sake of Yacc-compatible conflict reports in conflicts.c.
     All other warnings should be implemented in complain.c and should use
     the normal warning format.  */
-void set_warning_issued (void);
+void set_warning_issued (warnings warning);
 
 /** Make a complaint, but don't specify any location.  */
 void complain (warnings flags, char const *message, ...)