# HG changeset patch
# User Paul Eggert <eggert@cs.ucla.edu>
# Date 1086061785 0
# Node ID 5f558ceff8fb11c292d728081448e6a20d60f14e
# Parent  d4c310e7951fd7bfc0611a6cf83044695982d2e2
Remove dependency of hash and xalloc modules on the malloc and realloc
modules.

diff --git a/ChangeLog b/ChangeLog
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,8 @@
 2004-05-30  Paul Eggert  <eggert@cs.ucla.edu>
 
+	* modules/hash (Depends-on): Remove malloc, realloc.
+	* modules/xalloc (Depends-on): Likewise.
+
 	* README: Mention that the 'free' module works around the
 	problem with 'free (0)'.
 	Mention LIA-1 and C99.
diff --git a/lib/ChangeLog b/lib/ChangeLog
--- a/lib/ChangeLog
+++ b/lib/ChangeLog
@@ -1,3 +1,10 @@
+2004-05-30  Paul Eggert  <eggert@cs.ucla.edu>
+
+	* xmalloc.c (HAVE_MALLOC, HAVE_REALLOC): Do not require these
+	macros to be defined.
+	(xnmalloc_inline, xnrealloc_inline, xcalloc): Do not die if
+	the allocator returns NULL because the requested size is zero.
+
 2004-05-20  Paul Eggert  <eggert@cs.ucla.edu>
 
 	* malloc/obstack.c (_obstack) [defined _LIBC]: Bring back this
diff --git a/lib/xmalloc.c b/lib/xmalloc.c
--- a/lib/xmalloc.c
+++ b/lib/xmalloc.c
@@ -1,7 +1,7 @@
 /* xmalloc.c -- malloc with out of memory checking
 
    Copyright (C) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 2003,
-   1999, 2000, 2002, 2003 Free Software Foundation, Inc.
+   1999, 2000, 2002, 2003, 2004 Free Software Foundation, Inc.
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -37,14 +37,6 @@
 # define SIZE_MAX ((size_t) -1)
 #endif
 
-#ifndef HAVE_MALLOC
-"you must run the autoconf test for a GNU libc compatible malloc"
-#endif
-
-#ifndef HAVE_REALLOC
-"you must run the autoconf test for a GNU libc compatible realloc"
-#endif
-
 /* If non NULL, call this function when memory is exhausted. */
 void (*xalloc_fail_func) (void) = 0;
 
@@ -71,7 +63,7 @@
 xnmalloc_inline (size_t n, size_t s)
 {
   void *p;
-  if (xalloc_oversized (n, s) || ! (p = malloc (n * s)))
+  if (xalloc_oversized (n, s) || (! (p = malloc (n * s)) && n != 0))
     xalloc_die ();
   return p;
 }
@@ -96,7 +88,7 @@
 static inline void *
 xnrealloc_inline (void *p, size_t n, size_t s)
 {
-  if (xalloc_oversized (n, s) || ! (p = realloc (p, n * s)))
+  if (xalloc_oversized (n, s) || (! (p = realloc (p, n * s)) && n != 0))
     xalloc_die ();
   return p;
 }
@@ -239,7 +231,7 @@
   void *p;
   /* Test for overflow, since some calloc implementations don't have
      proper overflow checks.  */
-  if (xalloc_oversized (n, s) || ! (p = calloc (n, s)))
+  if (xalloc_oversized (n, s) || (! (p = calloc (n, s)) && n != 0))
     xalloc_die ();
   return p;
 }
diff --git a/m4/ChangeLog b/m4/ChangeLog
--- a/m4/ChangeLog
+++ b/m4/ChangeLog
@@ -1,3 +1,8 @@
+2004-05-30  Paul Eggert  <eggert@cs.ucla.edu>
+
+	* xalloc.m4 (gl_PREREQ_XMALLOC): Do not require AC_FUNC_MALLOC
+	or AC_FUNC_REALLOC.
+
 2004-05-20  Andreas Schwab  <schwab@suse.de>
 
 	* free.m4: Replace free if it not known to work, not the other
diff --git a/m4/xalloc.m4 b/m4/xalloc.m4
--- a/m4/xalloc.m4
+++ b/m4/xalloc.m4
@@ -1,4 +1,4 @@
-# xalloc.m4 serial 8
+# xalloc.m4 serial 9
 dnl Copyright (C) 2002-2004 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
@@ -21,8 +21,6 @@
 # Prerequisites of lib/xmalloc.c.
 AC_DEFUN([gl_PREREQ_XMALLOC], [
   AC_REQUIRE([AC_C_INLINE])
-  AC_REQUIRE([AC_FUNC_MALLOC])
-  AC_REQUIRE([AC_FUNC_REALLOC])
   :
 ])
 
diff --git a/modules/hash b/modules/hash
--- a/modules/hash
+++ b/modules/hash
@@ -7,8 +7,6 @@
 m4/hash.m4
 
 Depends-on:
-malloc
-realloc
 stdbool
 
 configure.ac:
diff --git a/modules/xalloc b/modules/xalloc
--- a/modules/xalloc
+++ b/modules/xalloc
@@ -8,8 +8,6 @@
 m4/xalloc.m4
 
 Depends-on:
-malloc
-realloc
 error
 gettext
 exitfail