satisfy gcc -Wundef

diff --git a/lib/getdate.y b/lib/getdate.y
index 8afd6fa9c0b7f7eca154783bf21f5bf3d350785c..6e81d3b3b26dec20627b8d8f945fb5b39678fd74 100644 (file)
--- a/lib/getdate.y
+++ b/lib/getdate.y
@@ -21,6 +21,11 @@
 # endif
 #endif
 
+#ifndef YYDEBUG
+  /* to satisfy gcc -Wundef, we set this to 0 */
+#define YYDEBUG 0
+#endif
+
 /* Since the code of getdate.y is not included in the Emacs executable
    itself, there is no need to #define static in this file.  Even if
    the code were included in the Emacs executable, it probably