From 8d8458032da8555e5dc562cf93336d9cebf5d482 Mon Sep 17 00:00:00 2001
From: cuz <cuz@b7a2c559-68d2-44c3-8de9-860c34a00d81>
Date: Fri, 26 Jul 2002 19:27:55 +0000
Subject: [PATCH] Fixed a bug

git-svn-id: svn://svn.cc65.org/cc65/trunk@1371 b7a2c559-68d2-44c3-8de9-860c34a00d81
---
 src/cc65/expr.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/cc65/expr.c b/src/cc65/expr.c
index dfebf8adc..cf4499dac 100644
--- a/src/cc65/expr.c
+++ b/src/cc65/expr.c
@@ -855,6 +855,14 @@ static int primary (ExprDesc* lval)
     	return k;
     }
 
+    /* If we run into an identifier in preprocessing mode, we assume that this
+     * is an undefined macro and replace it by a constant value of zero.
+     */
+    if (Preprocessing && CurTok.Tok == TOK_IDENT) {
+        MakeConstIntExpr (lval, 0);
+        return 0;
+    }
+
     /* All others may only be used if the expression evaluation is not called
      * recursively by the preprocessor.
      */
-- 
2.39.5