Update GNUlib stuff

17 files changed, 114 insertions, 225 deletions

diff --git a/m4/00gnulib.m4 b/m4/00gnulib.m4
index 301469b3..7feed466 100644
--- a/m4/00gnulib.m4
+++ b/m4/00gnulib.m4
@@ -1,5 +1,5 @@
 # 00gnulib.m4 serial 2
-dnl Copyright (C) 2009-2010 Free Software Foundation, Inc.
+dnl Copyright (C) 2009-2011 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
diff --git a/m4/extensions.m4 b/m4/extensions.m4
index 7d9458a8..1330503f 100644
--- a/m4/extensions.m4
+++ b/m4/extensions.m4
@@ -1,7 +1,7 @@
 # serial 9  -*- Autoconf -*-
 # Enable extensions on systems that normally disable them.
 
-# Copyright (C) 2003, 2006-2010 Free Software Foundation, Inc.
+# Copyright (C) 2003, 2006-2011 Free Software Foundation, Inc.
 # This file is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,
 # with or without modifications, as long as this notice is preserved.
diff --git a/m4/gnulib-cache.m4 b/m4/gnulib-cache.m4
index e09ed2cb..c93243e0 100644
--- a/m4/gnulib-cache.m4
+++ b/m4/gnulib-cache.m4
@@ -1,4 +1,4 @@
-# Copyright (C) 2002-2010 Free Software Foundation, Inc.
+# Copyright (C) 2002-2011 Free Software Foundation, Inc.
 #
 # This file is free software, distributed under the terms of the GNU
 # General Public License.  As a special exception to the GNU General
diff --git a/m4/gnulib-common.m4 b/m4/gnulib-common.m4
index d0c8b662..c4d7a20e 100644
--- a/m4/gnulib-common.m4
+++ b/m4/gnulib-common.m4
@@ -1,5 +1,5 @@
-# gnulib-common.m4 serial 21
-dnl Copyright (C) 2007-2010 Free Software Foundation, Inc.
+# gnulib-common.m4 serial 24
+dnl Copyright (C) 2007-2011 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
@@ -102,6 +102,27 @@ AC_DEFUN([gl_MODULE_INDICATOR_FOR_TESTS],
     [Define to 1 when the gnulib module $1 should be tested.])
 ])
 
+# gl_ASSERT_NO_GNULIB_POSIXCHECK
+# asserts that there will never be a need to #define GNULIB_POSIXCHECK.
+# and thereby enables an optimization of configure and config.h.
+# Used by Emacs.
+AC_DEFUN([gl_ASSERT_NO_GNULIB_POSIXCHECK],
+[
+  dnl Override gl_WARN_ON_USE_PREPARE.
+  dnl But hide this definition from 'aclocal'.
+  AC_DEFUN([gl_W][ARN_ON_USE_PREPARE], [])
+])
+
+# gl_ASSERT_NO_GNULIB_TESTS
+# asserts that there will be no gnulib tests in the scope of the configure.ac
+# and thereby enables an optimization of config.h.
+# Used by Emacs.
+AC_DEFUN([gl_ASSERT_NO_GNULIB_TESTS],
+[
+  dnl Override gl_MODULE_INDICATOR_FOR_TESTS.
+  AC_DEFUN([gl_MODULE_INDICATOR_FOR_TESTS], [])
+])
+
 # Test whether <features.h> exists.
 # Set HAVE_FEATURES_H.
 AC_DEFUN([gl_FEATURES_H],
diff --git a/m4/gnulib-comp.m4 b/m4/gnulib-comp.m4
index 4b97830a..8c573e37 100644
--- a/m4/gnulib-comp.m4
+++ b/m4/gnulib-comp.m4
@@ -1,5 +1,5 @@
 # DO NOT EDIT! GENERATED AUTOMATICALLY!
-# Copyright (C) 2002-2010 Free Software Foundation, Inc.
+# Copyright (C) 2002-2011 Free Software Foundation, Inc.
 #
 # This file is free software, distributed under the terms of the GNU
 # General Public License.  As a special exception to the GNU General
@@ -32,7 +32,6 @@ AC_DEFUN([gl_EARLY],
   AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
   # Code from module include_next:
   # Code from module lib-ignore:
-  # Code from module memchr:
   # Code from module stddef:
   # Code from module string:
   # Code from module strndup:
@@ -56,27 +55,13 @@ AC_DEFUN([gl_INIT],
   m4_pushdef([gl_LIBSOURCES_DIR], [])
   gl_COMMON
   gl_source_base='lib'
-  # Code from module arg-nonnull:
-  # Code from module c++defs:
-  # Code from module extensions:
-  # Code from module include_next:
-  # Code from module lib-ignore:
-  gl_IGNORE_UNUSED_LIBRARIES
-  # Code from module memchr:
-  gl_FUNC_MEMCHR
-  gl_STRING_MODULE_INDICATOR([memchr])
-  # Code from module stddef:
-  gl_STDDEF_H
-  # Code from module string:
-  gl_HEADER_STRING_H
-  # Code from module strndup:
-  gl_FUNC_STRNDUP
-  gl_STRING_MODULE_INDICATOR([strndup])
-  # Code from module strnlen:
-  gl_FUNC_STRNLEN
-  gl_STRING_MODULE_INDICATOR([strnlen])
-  # Code from module warn-on-use:
-  # Code from module dummy:
+gl_IGNORE_UNUSED_LIBRARIES
+gl_STDDEF_H
+gl_HEADER_STRING_H
+gl_FUNC_STRNDUP
+gl_STRING_MODULE_INDICATOR([strndup])
+gl_FUNC_STRNLEN
+gl_STRING_MODULE_INDICATOR([strnlen])
   # End of code from modules
   m4_ifval(gl_LIBSOURCES_LIST, [
     m4_syscmd([test ! -d ]m4_defn([gl_LIBSOURCES_DIR])[ ||
@@ -221,8 +206,6 @@ AC_DEFUN([gl_FILE_LIST], [
   build-aux/c++defs.h
   build-aux/warn-on-use.h
   lib/dummy.c
-  lib/memchr.c
-  lib/memchr.valgrind
   lib/stddef.in.h
   lib/string.in.h
   lib/strndup.c
@@ -232,8 +215,6 @@ AC_DEFUN([gl_FILE_LIST], [
   m4/gnulib-common.m4
   m4/include_next.m4
   m4/lib-ignore.m4
-  m4/memchr.m4
-  m4/mmap-anon.m4
   m4/onceonly.m4
   m4/stddef_h.m4
   m4/string_h.m4
diff --git a/m4/gnulib-tool.m4 b/m4/gnulib-tool.m4
index 69e7733b..ed41e9d4 100644
--- a/m4/gnulib-tool.m4
+++ b/m4/gnulib-tool.m4
@@ -1,5 +1,5 @@
 # gnulib-tool.m4 serial 2
-dnl Copyright (C) 2004-2005, 2009-2010 Free Software Foundation, Inc.
+dnl Copyright (C) 2004-2005, 2009-2011 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
diff --git a/m4/include_next.m4 b/m4/include_next.m4
index e37eb056..b3c78491 100644
--- a/m4/include_next.m4
+++ b/m4/include_next.m4
@@ -1,5 +1,5 @@
-# include_next.m4 serial 16
-dnl Copyright (C) 2006-2010 Free Software Foundation, Inc.
+# include_next.m4 serial 18
+dnl Copyright (C) 2006-2011 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
@@ -147,11 +147,33 @@ choke me
 # Note: This macro assumes that the header file is not empty after
 # preprocessing, i.e. it does not only define preprocessor macros but also
 # provides some type/enum definitions or function/variable declarations.
+#
+# This macro also checks whether each header exists, by invoking
+# AC_CHECK_HEADERS_ONCE or AC_CHECK_HEADERS on each argument.
 AC_DEFUN([gl_CHECK_NEXT_HEADERS],
 [
+  gl_NEXT_HEADERS_INTERNAL([$1], [check])
+])
+
+# gl_NEXT_HEADERS(HEADER1 HEADER2 ...)
+# ------------------------------------
+# Like gl_CHECK_NEXT_HEADERS, except do not check whether the headers exist.
+# This is suitable for headers like <stddef.h> that are standardized by C89
+# and therefore can be assumed to exist.
+AC_DEFUN([gl_NEXT_HEADERS],
+[
+  gl_NEXT_HEADERS_INTERNAL([$1], [assume])
+])
+
+# The guts of gl_CHECK_NEXT_HEADERS and gl_NEXT_HEADERS.
+AC_DEFUN([gl_NEXT_HEADERS_INTERNAL],
+[
   AC_REQUIRE([gl_INCLUDE_NEXT])
   AC_REQUIRE([AC_CANONICAL_HOST])
-  AC_CHECK_HEADERS_ONCE([$1])
+
+  m4_if([$2], [check],
+    [AC_CHECK_HEADERS_ONCE([$1])
+    ])
 
   m4_foreach_w([gl_HEADER_NAME], [$1],
     [AS_VAR_PUSHDEF([gl_next_header],
@@ -162,39 +184,44 @@ AC_DEFUN([gl_CHECK_NEXT_HEADERS],
        AC_CACHE_CHECK(
          [absolute name of <]m4_defn([gl_HEADER_NAME])[>],
          m4_defn([gl_next_header]),
-         [AS_VAR_PUSHDEF([gl_header_exists],
-                         [ac_cv_header_]m4_defn([gl_HEADER_NAME]))
-          if test AS_VAR_GET(gl_header_exists) = yes; then
-            AC_LANG_CONFTEST(
-              [AC_LANG_SOURCE(
-                 [[#include <]]m4_dquote(m4_defn([gl_HEADER_NAME]))[[>]]
-               )])
-            dnl AIX "xlc -E" and "cc -E" omit #line directives for header files
-            dnl that contain only a #include of other header files and no
-            dnl non-comment tokens of their own. This leads to a failure to
-            dnl detect the absolute name of <dirent.h>, <signal.h>, <poll.h>
-            dnl and others. The workaround is to force preservation of comments
-            dnl through option -C. This ensures all necessary #line directives
-            dnl are present. GCC supports option -C as well.
-            case "$host_os" in
-              aix*) gl_absname_cpp="$ac_cpp -C" ;;
-              *)    gl_absname_cpp="$ac_cpp" ;;
-            esac
-            dnl eval is necessary to expand gl_absname_cpp.
-            dnl Ultrix and Pyramid sh refuse to redirect output of eval,
-            dnl so use subshell.
-            AS_VAR_SET([gl_next_header],
-              ['"'`(eval "$gl_absname_cpp conftest.$ac_ext") 2>&AS_MESSAGE_LOG_FD |
-               sed -n '\#/]m4_defn([gl_HEADER_NAME])[#{
-                 s#.*"\(.*/]m4_defn([gl_HEADER_NAME])[\)".*#\1#
-                 s#^/[^/]#//&#
-                 p
-                 q
-               }'`'"'])
-          else
-            AS_VAR_SET([gl_next_header], ['<'gl_HEADER_NAME'>'])
-          fi
-          AS_VAR_POPDEF([gl_header_exists])])
+         [m4_if([$2], [check],
+            [AS_VAR_PUSHDEF([gl_header_exists],
+                            [ac_cv_header_]m4_defn([gl_HEADER_NAME]))
+             if test AS_VAR_GET(gl_header_exists) = yes; then
+             AS_VAR_POPDEF([gl_header_exists])
+            ])
+               AC_LANG_CONFTEST(
+                 [AC_LANG_SOURCE(
+                    [[#include <]]m4_dquote(m4_defn([gl_HEADER_NAME]))[[>]]
+                  )])
+               dnl AIX "xlc -E" and "cc -E" omit #line directives for header
+               dnl files that contain only a #include of other header files and
+               dnl no non-comment tokens of their own. This leads to a failure
+               dnl to detect the absolute name of <dirent.h>, <signal.h>,
+               dnl <poll.h> and others. The workaround is to force preservation
+               dnl of comments through option -C. This ensures all necessary
+               dnl #line directives are present. GCC supports option -C as well.
+               case "$host_os" in
+                 aix*) gl_absname_cpp="$ac_cpp -C" ;;
+                 *)    gl_absname_cpp="$ac_cpp" ;;
+               esac
+               dnl eval is necessary to expand gl_absname_cpp.
+               dnl Ultrix and Pyramid sh refuse to redirect output of eval,
+               dnl so use subshell.
+               AS_VAR_SET([gl_next_header],
+                 ['"'`(eval "$gl_absname_cpp conftest.$ac_ext") 2>&AS_MESSAGE_LOG_FD |
+                  sed -n '\#/]m4_defn([gl_HEADER_NAME])[#{
+                    s#.*"\(.*/]m4_defn([gl_HEADER_NAME])[\)".*#\1#
+                    s#^/[^/]#//&#
+                    p
+                    q
+                  }'`'"'])
+          m4_if([$2], [check],
+            [else
+               AS_VAR_SET([gl_next_header], ['<'gl_HEADER_NAME'>'])
+             fi
+            ])
+         ])
      fi
      AC_SUBST(
        AS_TR_CPP([NEXT_]m4_defn([gl_HEADER_NAME])),
diff --git a/m4/lib-ignore.m4 b/m4/lib-ignore.m4
index a67b002c..1fdfdc07 100644
--- a/m4/lib-ignore.m4
+++ b/m4/lib-ignore.m4
@@ -1,6 +1,6 @@
 # If possible, ignore libraries that are not depended on.
 
-dnl Copyright (C) 2006, 2009-2010 Free Software Foundation, Inc.
+dnl Copyright (C) 2006, 2009-2011 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
diff --git a/m4/memchr.m4 b/m4/memchr.m4
deleted file mode 100644
index 46db9fb6..00000000
--- a/m4/memchr.m4
+++ /dev/null
@@ -1,88 +0,0 @@
-# memchr.m4 serial 10
-dnl Copyright (C) 2002-2004, 2009-2010 Free Software Foundation, Inc.
-dnl This file is free software; the Free Software Foundation
-dnl gives unlimited permission to copy and/or distribute it,
-dnl with or without modifications, as long as this notice is preserved.
-
-AC_DEFUN_ONCE([gl_FUNC_MEMCHR],
-[
-  dnl Check for prerequisites for memory fence checks.
-  gl_FUNC_MMAP_ANON
-  AC_CHECK_HEADERS_ONCE([sys/mman.h])
-  AC_CHECK_FUNCS_ONCE([mprotect])
-
-  dnl These days, we assume memchr is present.  But just in case...
-  AC_REQUIRE([gl_HEADER_STRING_H_DEFAULTS])
-  AC_CHECK_FUNCS_ONCE([memchr])
-  if test $ac_cv_func_memchr = yes; then
-    # Detect platform-specific bugs in some versions of glibc:
-    # memchr should not dereference anything with length 0
-    #   http://bugzilla.redhat.com/499689
-    # memchr should not dereference overestimated length after a match
-    #   http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=521737
-    #   http://sourceware.org/bugzilla/show_bug.cgi?id=10162
-    # Assume that memchr works on platforms that lack mprotect.
-    AC_CACHE_CHECK([whether memchr works], [gl_cv_func_memchr_works],
-      [AC_RUN_IFELSE([AC_LANG_PROGRAM([[
-#include <string.h>
-#if HAVE_SYS_MMAN_H
-# include <fcntl.h>
-# include <unistd.h>
-# include <sys/types.h>
-# include <sys/mman.h>
-# ifndef MAP_FILE
-#  define MAP_FILE 0
-# endif
-#endif
-]], [[
-  int result = 0;
-  char *fence = NULL;
-#if HAVE_SYS_MMAN_H && HAVE_MPROTECT
-# if HAVE_MAP_ANONYMOUS
-  const int flags = MAP_ANONYMOUS | MAP_PRIVATE;
-  const int fd = -1;
-# else /* !HAVE_MAP_ANONYMOUS */
-  const int flags = MAP_FILE | MAP_PRIVATE;
-  int fd = open ("/dev/zero", O_RDONLY, 0666);
-  if (fd >= 0)
-# endif
-    {
-      int pagesize = getpagesize ();
-      char *two_pages =
-        (char *) mmap (NULL, 2 * pagesize, PROT_READ | PROT_WRITE,
-                       flags, fd, 0);
-      if (two_pages != (char *)(-1)
-          && mprotect (two_pages + pagesize, pagesize, PROT_NONE) == 0)
-        fence = two_pages + pagesize;
-    }
-#endif
-  if (fence)
-    {
-      if (memchr (fence, 0, 0))
-        result |= 1;
-      strcpy (fence - 9, "12345678");
-      if (memchr (fence - 9, 0, 79) != fence - 1)
-        result |= 2;
-      if (memchr (fence - 1, 0, 3) != fence - 1)
-        result |= 4;
-    }
-  return result;
-]])], [gl_cv_func_memchr_works=yes], [gl_cv_func_memchr_works=no],
-      [dnl Be pessimistic for now.
-       gl_cv_func_memchr_works="guessing no"])])
-    if test "$gl_cv_func_memchr_works" != yes; then
-      REPLACE_MEMCHR=1
-    fi
-  else
-    HAVE_MEMCHR=0
-  fi
-  if test $HAVE_MEMCHR = 0 || test $REPLACE_MEMCHR = 1; then
-    AC_LIBOBJ([memchr])
-    gl_PREREQ_MEMCHR
-  fi
-])
-
-# Prerequisites of lib/memchr.c.
-AC_DEFUN([gl_PREREQ_MEMCHR], [
-  AC_CHECK_HEADERS([bp-sym.h])
-])
diff --git a/m4/mmap-anon.m4 b/m4/mmap-anon.m4
deleted file mode 100644
index e20fc3c6..00000000
--- a/m4/mmap-anon.m4
+++ /dev/null
@@ -1,55 +0,0 @@
-# mmap-anon.m4 serial 9
-dnl Copyright (C) 2005, 2007, 2009-2010 Free Software Foundation, Inc.
-dnl This file is free software; the Free Software Foundation
-dnl gives unlimited permission to copy and/or distribute it,
-dnl with or without modifications, as long as this notice is preserved.
-
-# Detect how mmap can be used to create anonymous (not file-backed) memory
-# mappings.
-# - On Linux, AIX, OSF/1, Solaris, Cygwin, Interix, Haiku, both MAP_ANONYMOUS
-#   and MAP_ANON exist and have the same value.
-# - On HP-UX, only MAP_ANONYMOUS exists.
-# - On MacOS X, FreeBSD, NetBSD, OpenBSD, only MAP_ANON exists.
-# - On IRIX, neither exists, and a file descriptor opened to /dev/zero must be
-#   used.
-
-AC_DEFUN([gl_FUNC_MMAP_ANON],
-[
-  dnl Persuade glibc <sys/mman.h> to define MAP_ANONYMOUS.
-  AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
-
-  # Check for mmap(). Don't use AC_FUNC_MMAP, because it checks too much: it
-  # fails on HP-UX 11, because MAP_FIXED mappings do not work. But this is
-  # irrelevant for anonymous mappings.
-  AC_CHECK_FUNC([mmap], [gl_have_mmap=yes], [gl_have_mmap=no])
-
-  # Try to allow MAP_ANONYMOUS.
-  gl_have_mmap_anonymous=no
-  if test $gl_have_mmap = yes; then
-    AC_MSG_CHECKING([for MAP_ANONYMOUS])
-    AC_EGREP_CPP([I cant identify this map.], [
-#include <sys/mman.h>
-#ifdef MAP_ANONYMOUS
-    I cant identify this map.
-#endif
-],
-      [gl_have_mmap_anonymous=yes])
-    if test $gl_have_mmap_anonymous != yes; then
-      AC_EGREP_CPP([I cant identify this map.], [
-#include <sys/mman.h>
-#ifdef MAP_ANON
-    I cant identify this map.
-#endif
-],
-        [AC_DEFINE([MAP_ANONYMOUS], [MAP_ANON],
-          [Define to a substitute value for mmap()'s MAP_ANONYMOUS flag.])
-         gl_have_mmap_anonymous=yes])
-    fi
-    AC_MSG_RESULT([$gl_have_mmap_anonymous])
-    if test $gl_have_mmap_anonymous = yes; then
-      AC_DEFINE([HAVE_MAP_ANONYMOUS], [1],
-        [Define to 1 if mmap()'s MAP_ANONYMOUS flag is available after including
-         config.h and <sys/mman.h>.])
-    fi
-  fi
-])
diff --git a/m4/onceonly.m4 b/m4/onceonly.m4
index 6a9c87b7..223071a2 100644
--- a/m4/onceonly.m4
+++ b/m4/onceonly.m4
@@ -1,5 +1,5 @@
 # onceonly.m4 serial 7
-dnl Copyright (C) 2002-2003, 2005-2006, 2008-2010 Free Software Foundation,
+dnl Copyright (C) 2002-2003, 2005-2006, 2008-2011 Free Software Foundation,
 dnl 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
diff --git a/m4/stddef_h.m4 b/m4/stddef_h.m4
index c3ae5694..1ae23443 100644
--- a/m4/stddef_h.m4
+++ b/m4/stddef_h.m4
@@ -1,6 +1,6 @@
 dnl A placeholder for POSIX 2008 <stddef.h>, for platforms that have issues.
-# stddef_h.m4 serial 2
-dnl Copyright (C) 2009, 2010 Free Software Foundation, Inc.
+# stddef_h.m4 serial 4
+dnl Copyright (C) 2009-2011 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
@@ -9,6 +9,7 @@ AC_DEFUN([gl_STDDEF_H],
 [
   AC_REQUIRE([gl_STDDEF_H_DEFAULTS])
   AC_REQUIRE([gt_TYPE_WCHAR_T])
+  STDDEF_H=
   if test $gt_cv_c_wchar_t = no; then
     HAVE_WCHAR_T=0
     STDDEF_H=stddef.h
@@ -24,8 +25,10 @@ AC_DEFUN([gl_STDDEF_H],
     REPLACE_NULL=1
     STDDEF_H=stddef.h
   fi
+  AC_SUBST([STDDEF_H])
+  AM_CONDITIONAL([GL_GENERATE_STDDEF_H], [test -n "$STDDEF_H"])
   if test -n "$STDDEF_H"; then
-    gl_CHECK_NEXT_HEADERS([stddef.h])
+    gl_NEXT_HEADERS([stddef.h])
   fi
 ])
 
@@ -41,5 +44,4 @@ AC_DEFUN([gl_STDDEF_H_DEFAULTS],
   dnl Assume proper GNU behavior unless another module says otherwise.
   REPLACE_NULL=0;                AC_SUBST([REPLACE_NULL])
   HAVE_WCHAR_T=1;                AC_SUBST([HAVE_WCHAR_T])
-  STDDEF_H='';                   AC_SUBST([STDDEF_H])
 ])
diff --git a/m4/string_h.m4 b/m4/string_h.m4
index 5844b2d6..df8c4035 100644
--- a/m4/string_h.m4
+++ b/m4/string_h.m4
@@ -1,11 +1,11 @@
 # Configure a GNU-like replacement for <string.h>.
 
-# Copyright (C) 2007-2010 Free Software Foundation, Inc.
+# Copyright (C) 2007-2011 Free Software Foundation, Inc.
 # This file is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,
 # with or without modifications, as long as this notice is preserved.
 
-# serial 18
+# serial 20
 
 # Written by Paul Eggert.
 
@@ -20,7 +20,7 @@ AC_DEFUN([gl_HEADER_STRING_H_BODY],
 [
   AC_REQUIRE([AC_C_RESTRICT])
   AC_REQUIRE([gl_HEADER_STRING_H_DEFAULTS])
-  gl_CHECK_NEXT_HEADERS([string.h])
+  gl_NEXT_HEADERS([string.h])
 
   dnl Check for declarations of anything we want to poison if the
   dnl corresponding gnulib module is not in use, and which is not
@@ -104,6 +104,7 @@ AC_DEFUN([gl_HEADER_STRING_H_DEFAULTS],
   REPLACE_STRDUP=0;             AC_SUBST([REPLACE_STRDUP])
   REPLACE_STRSTR=0;             AC_SUBST([REPLACE_STRSTR])
   REPLACE_STRCASESTR=0;         AC_SUBST([REPLACE_STRCASESTR])
+  REPLACE_STRCHRNUL=0;          AC_SUBST([REPLACE_STRCHRNUL])
   REPLACE_STRERROR=0;           AC_SUBST([REPLACE_STRERROR])
   REPLACE_STRERROR_R=0;         AC_SUBST([REPLACE_STRERROR_R])
   REPLACE_STRNCAT=0;            AC_SUBST([REPLACE_STRNCAT])
diff --git a/m4/strndup.m4 b/m4/strndup.m4
index b3567d89..d8f00cab 100644
--- a/m4/strndup.m4
+++ b/m4/strndup.m4
@@ -1,5 +1,5 @@
 # strndup.m4 serial 18
-dnl Copyright (C) 2002-2003, 2005-2010 Free Software Foundation, Inc.
+dnl Copyright (C) 2002-2003, 2005-2011 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
diff --git a/m4/strnlen.m4 b/m4/strnlen.m4
index 52bb838f..a1c59ac6 100644
--- a/m4/strnlen.m4
+++ b/m4/strnlen.m4
@@ -1,5 +1,5 @@
 # strnlen.m4 serial 12
-dnl Copyright (C) 2002-2003, 2005-2007, 2009-2010 Free Software Foundation,
+dnl Copyright (C) 2002-2003, 2005-2007, 2009-2011 Free Software Foundation,
 dnl Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
diff --git a/m4/warn-on-use.m4 b/m4/warn-on-use.m4
index 42daae87..e0d0f276 100644
--- a/m4/warn-on-use.m4
+++ b/m4/warn-on-use.m4
@@ -1,5 +1,5 @@
 # warn-on-use.m4 serial 2
-dnl Copyright (C) 2010 Free Software Foundation, Inc.
+dnl Copyright (C) 2010-2011 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
diff --git a/m4/wchar_t.m4 b/m4/wchar_t.m4
index a133e6ad..d2c03c42 100644
--- a/m4/wchar_t.m4
+++ b/m4/wchar_t.m4
@@ -1,5 +1,5 @@
 # wchar_t.m4 serial 4 (gettext-0.18.2)
-dnl Copyright (C) 2002-2003, 2008-2010 Free Software Foundation, Inc.
+dnl Copyright (C) 2002-2003, 2008-2011 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.