[Bug-gnulib] alloca patch to assume C89 or better

[Paul Eggert]

I installed this:

2003-09-08  Paul Eggert  <address@hidden>

        * lib/alloca.c: Include <string.h>, <stdlib.h> unconditionally.
        (POINTER_TYPE, pointer): Remove; all uses changed to void *.
        (NULL): Remove.
        (find_stack_direction, alloca): Use prototypes.
        * m4/alloca.m4 (gl_PREREQ_ALLOCA): Don't check for stdlib.h, string.h.

Index: lib/alloca.c
===================================================================
RCS file: /cvsroot/gnulib/gnulib/lib/alloca.c,v
retrieving revision 1.10
diff -p -u -r1.10 alloca.c
--- lib/alloca.c        9 Aug 2003 08:57:49 -0000       1.10
+++ lib/alloca.c        8 Sep 2003 22:54:17 -0000
@@ -25,12 +25,8 @@
 # include <config.h>
 #endif
 
-#if HAVE_STRING_H
-# include <string.h>
-#endif
-#if HAVE_STDLIB_H
-# include <stdlib.h>
-#endif
+#include <string.h>
+#include <stdlib.h>
 
 #ifdef emacs
 # include "lisp.h"
@@ -77,19 +73,6 @@ long i00afunc ();
 #   define ADDRESS_FUNCTION(arg) &(arg)
 #  endif
 
-#  ifndef POINTER_TYPE
-#   ifdef __STDC__
-#    define POINTER_TYPE void
-#   else
-#    define POINTER_TYPE char
-#   endif
-#  endif
-typedef POINTER_TYPE *pointer;
-
-#  ifndef NULL
-#   define NULL 0
-#  endif
-
 /* Define STACK_DIRECTION if you know the direction of stack
    growth for your system; otherwise it will be automatically
    deduced at run-time.
@@ -112,7 +95,7 @@ static int stack_dir;                /* 1 or -1 once k
 #   define STACK_DIR   stack_dir
 
 static void
-find_stack_direction ()
+find_stack_direction (void)
 {
   static char *addr = NULL;    /* Address of first `dummy', once known.  */
   auto char dummy;             /* To get stack address.  */
@@ -165,9 +148,8 @@ static header *last_alloca_header = NULL
    caller, but that method cannot be made to work for some
    implementations of C, for example under Gould's UTX/32.  */
 
-pointer
-alloca (size)
-     size_t size;
+void *
+alloca (size_t size)
 {
   auto char probe;             /* Probes stack depth: */
   register char *depth = ADDRESS_FUNCTION (probe);
@@ -214,7 +196,7 @@ alloca (size)
 
   {
     /* Address of header.  */
-    register pointer new;
+    register void *new;
 
     size_t combined_size = sizeof (header) + size;
     if (combined_size < sizeof (header))
@@ -232,7 +214,7 @@ alloca (size)
 
     /* User storage begins just after header.  */
 
-    return (pointer) ((char *) new + sizeof (header));
+    return (void *) ((char *) new + sizeof (header));
   }
 }
 
Index: m4/alloca.m4
===================================================================
RCS file: /cvsroot/gnulib/gnulib/m4/alloca.m4,v
retrieving revision 1.4
diff -p -u -r1.4 alloca.m4
--- m4/alloca.m4        30 May 2003 13:12:15 -0000      1.4
+++ m4/alloca.m4        8 Sep 2003 22:54:17 -0000
@@ -1,4 +1,4 @@
-# alloca.m4 serial 2 (gettext-0.12)
+# alloca.m4 serial 3
 dnl Copyright (C) 2002-2003 Free Software Foundation, Inc.
 dnl This file is free software, distributed under the terms of the GNU
 dnl General Public License.  As a special exception to the GNU General
@@ -31,6 +31,4 @@ AC_DEFUN([gl_FUNC_ALLOCA],
 
 # Prerequisites of lib/alloca.c.
 # STACK_DIRECTION is already handled by AC_FUNC_ALLOCA.
-AC_DEFUN([gl_PREREQ_ALLOCA], [
-  AC_CHECK_HEADERS_ONCE(stdlib.h string.h)
-])
+AC_DEFUN([gl_PREREQ_ALLOCA], [:])