Add warning flags. More warn fixes.

1 files changed, 2 insertions, 0 deletions

diff --git a/cpy.y b/cpy.y
index c1d71fe..ba31ed5 100644
--- a/cpy.y
+++ b/cpy.y
@@ -62,8 +62,10 @@
  */
 
 %{
+#include <stdlib.h>
 #include <string.h>
 int yylex2(void);
+void yyerror(char *);
 #define yylex yylex2
 %}