--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,16 @@
+2009-03-12  Jim Meyering  <meyering@redhat.com>
+
+	avoid gcc warnings about unused macro definitions
+	* lib/readtokens.c (STREQ): Remove unused definition.
+	* lib/xmalloc.c (SIZE_MAX): Likewise.
+	* lib/openat-die.c (N_): Likewise.
+	* lib/mountlist.c (SIZE_MAX): Remove definition.
+	Instead, include <stdint.h>.
+	* lib/readutmp.c: Likewise.
+	* modules/readutmp (Depends-on): Add stdint.
+	* modules/mountlist (Depends-on): Add stdint.
+	* lib/userspec.c (ISDIGIT): Move definition into #if block where used.
+
 2009-03-10  Bruno Haible  <bruno@clisp.org>
 
 	Tests for module 'mbmemcasecoll'.

--- a/lib/mountlist.c
+++ b/lib/mountlist.c
@@ -23,6 +23,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <stdint.h>
 
 #include "xalloc.h"
 
@@ -133,10 +134,6 @@
 # include "unlocked-io.h"
 #endif
 
-#ifndef SIZE_MAX
-# define SIZE_MAX ((size_t) -1)
-#endif
-
 /* The results of open() in this file are not used with fchdir,
    therefore save some unnecessary work in fchdir.c.  */
 #undef open

--- a/lib/openat-die.c
+++ b/lib/openat-die.c
@@ -1,6 +1,6 @@
 /* Report a save- or restore-cwd failure in our openat replacement and then exit.
 
-   Copyright (C) 2005, 2006, 2008 Free Software Foundation, Inc.
+   Copyright (C) 2005, 2006, 2008-2009 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
@@ -26,7 +26,6 @@
 
 #include "gettext.h"
 #define _(msgid) gettext (msgid)
-#define N_(msgid) msgid
 
 void
 openat_save_fail (int errnum)

--- a/lib/readtokens.c
+++ b/lib/readtokens.c
@@ -1,6 +1,6 @@
 /* readtokens.c  -- Functions for reading tokens from an input stream.
 
-   Copyright (C) 1990-1991, 1999-2004, 2006 Free Software Foundation, Inc.
+   Copyright (C) 1990-1991, 1999-2004, 2006, 2009 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
@@ -36,9 +36,6 @@
 # include "unlocked-io.h"
 #endif
 
-#define STREQ(a,b) ((a) == (b) || ((a) && (b) && *(a) == *(b) \
-				   && strcmp(a, b) == 0))
-
 /* Initialize a tokenbuffer. */
 
 void

--- a/lib/readutmp.c
+++ b/lib/readutmp.c
@@ -31,6 +31,7 @@
 #include <stdbool.h>
 #include <string.h>
 #include <stdlib.h>
+#include <stdint.h>
 
 #include "xalloc.h"
 
@@ -38,10 +39,6 @@
 # include "unlocked-io.h"
 #endif
 
-#ifndef SIZE_MAX
-# define SIZE_MAX ((size_t) -1)
-#endif
-
 /* Copy UT->ut_name into storage obtained from malloc.  Then remove any
    trailing spaces from the copy, NUL terminate it, and return the copy.  */
 

--- a/lib/userspec.c
+++ b/lib/userspec.c
@@ -71,6 +71,8 @@
 # define MAXGID GID_T_MAX
 #endif
 
+#ifdef __DJGPP__
+
 /* ISDIGIT differs from isdigit, as follows:
    - Its arg may be any int or unsigned int; it need not be an unsigned char
      or EOF.
@@ -80,8 +82,6 @@
    of `digit' even when the host does not conform to POSIX.  */
 #define ISDIGIT(c) ((unsigned int) (c) - '0' <= 9)
 
-#ifdef __DJGPP__
-
 /* Return true if STR represents an unsigned decimal integer.  */
 
 static bool

--- 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,
-   1999, 2000, 2002, 2003, 2004, 2005, 2006, 2008 Free Software Foundation,
+   1999, 2000, 2002, 2003, 2004, 2005, 2006, 2008-2009 Free Software Foundation,
    Inc.
 
    This program is free software: you can redistribute it and/or modify
@@ -28,10 +28,6 @@
 #include <stdlib.h>
 #include <string.h>
 
-#ifndef SIZE_MAX
-# define SIZE_MAX ((size_t) -1)
-#endif
-
 /* 1 if calloc is known to be compatible with GNU calloc.  This
    matters if we are not also using the calloc module, which defines
    HAVE_CALLOC and supports the GNU API even on non-GNU platforms.  */

--- a/modules/mountlist
+++ b/modules/mountlist
@@ -10,6 +10,7 @@
 
 Depends-on:
 stdbool
+stdint
 xalloc
 
 configure.ac:

--- a/modules/readutmp
+++ b/modules/readutmp
@@ -10,6 +10,7 @@
 extensions
 xalloc
 stdbool
+stdint
 
 configure.ac:
 gl_READUTMP