improve declaration of yylex()

Replace the extern declaration of yylex() in gram.y with a
definition/use in parse.h, improving portability.

Signed-off-by: Thomas E. Dickey <dickey@invisible-island.net>

2 files changed, 3 insertions, 1 deletions

diff --git a/src/gram.y b/src/gram.y
index cf46d35..7394e81 100644
--- a/src/gram.y
+++ b/src/gram.y
@@ -100,7 +100,6 @@ static int color;
 int mods = 0;
 unsigned int mods_used = (ShiftMask | ControlMask | Mod1Mask);
 
-extern int yylex(void);
 static void yyerror(const char *s);
 
 %}
diff --git a/src/parse.h b/src/parse.h
index 2327ab1..f66bf06 100644
--- a/src/parse.h
+++ b/src/parse.h
@@ -63,6 +63,9 @@ in this Software without prior written authorization from The Open Group.
 #include "list.h"
 #include "gram.h"
 
+#define YY_DECL int yylex (void)
+YY_DECL;
+
 extern void assign_var_savecolor(void);
 extern int do_single_keyword(int keyword);
 extern int do_string_keyword(int keyword, char *s);