From deedb0b77c569bf6be408e67cb07bad6c7ce1214 Mon Sep 17 00:00:00 2001
From: Paul Eggert <eggert@cs.ucla.edu>
Date: Fri, 13 Dec 2002 08:44:28 +0000
Subject: [PATCH] (alloca): Remove; decl no longer needed. (<stddef.h>):
 Include, for offsetof. (<inttypes.>, <stdint.h>): Include if available.
 (uintptr_t): New type, if system lacks it. (CALLOC, MALLOC, REALLOC): New
 macros. All uses of XCALLOC, XMALLOC, and XREALLOC changed to use these new
 macros.

---
 src/system.h | 35 ++++++++++++++++++-----------------
 1 file changed, 18 insertions(+), 17 deletions(-)

diff --git a/src/system.h b/src/system.h
index 50149c98..bf1ef4cc 100644
--- a/src/system.h
+++ b/src/system.h
@@ -22,23 +22,7 @@
 # include <config.h>
 #endif
 
-/* AIX requires this to be the first thing in the file.  */
-#ifdef __GNUC__
-# define alloca(Size) __builtin_alloca (Size)
-#else
-# if HAVE_ALLOCA_H
-#  include <alloca.h>
-# else
-#  ifdef _AIX
- #pragma alloca
-#  else
-#   ifndef alloca /* predefined by HP cc +Olibcalls */
-char *alloca ();
-#   endif
-#  endif
-# endif
-#endif
-
+#include <stddef.h>
 #include <stdio.h>
 
 /* Verify a requirement at compile-time (unlike assert, which is runtime).  */
@@ -81,7 +65,24 @@ char *alloca ();
 
 #include <limits.h>
 
+#if HAVE_UINTPTR_T
+# if HAVE_INTTYPES_H
+#  include <inttypes.h>
+# else
+#  if HAVE_STDINT_H
+#   include <stdint.h>
+#  endif
+# endif
+#else
+/* This isn't perfect, but it's good enough for Bison, which needs
+   only to hash pointers.  */
+typedef size_t uintptr_t;
+#endif
+
 #include <xalloc.h>
+#define CALLOC(P, N) ((P) = xcalloc (N, sizeof *(P)))
+#define MALLOC(P, N) ((P) = xmalloc ((N) * sizeof *(P)))
+#define REALLOC(P, N) ((P) = xrealloc (P, (N) * sizeof *(P)))
 
 /* From xstrndup.c.  */
 char *xstrndup (const char *s, size_t n);
-- 
2.47.2