From 13389908dd45f4aa072f5019e222b9a560c363f7 Mon Sep 17 00:00:00 2001
From: Paul Eggert <eggert@cs.ucla.edu>
Date: Sun, 19 Dec 2004 13:42:26 +0000
Subject: Include <alloca.h> only if HAVE_ALLOCA. (YYSTACK_USE_ALLOCA): Define
 to 0 if !HAVE_ALLOCA. (YYMAXDEPTH): New macro.

---
 lib/getdate.y | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

(limited to 'lib')

diff --git a/lib/getdate.y b/lib/getdate.y
index 6ffee30b9..b57e6a56d 100644
--- a/lib/getdate.y
+++ b/lib/getdate.y
@@ -36,7 +36,18 @@
 
 #include "getdate.h"
 
-#include <alloca.h>
+/* Use alloca only if it is known to be builtin.  */
+#if HAVE_ALLOCA
+# include <alloca.h>
+#else
+# define YYSTACK_USE_ALLOCA 0
+#endif
+
+/* Tell Bison ow much stack space is needed.  20 should be plenty for
+   this grammar, which is not right recursive.  Beware setting it too
+   high, since that might cause problems on machines whose alloca
+   implementations have lame stack-overflow checking.  */
+#define YYMAXDEPTH 20
 
 /* 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
-- 
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