Update gnulib files.

57 files changed, 727 insertions, 263 deletions

diff --git a/build-aux/config.rpath b/build-aux/config.rpath
index c492a93b66..c547c68825 100755
--- a/build-aux/config.rpath
+++ b/build-aux/config.rpath
@@ -2,7 +2,7 @@
 # Output a system dependent set of variables, describing how to set the
 # run time search path of shared libraries in an executable.
 #
-#   Copyright 1996-2006 Free Software Foundation, Inc.
+#   Copyright 1996-2007 Free Software Foundation, Inc.
 #   Taken from GNU libtool, 2001
 #   Originally by Gordon Matzigkeit <gord@gnu.ai.mit.edu>, 1996
 #
@@ -64,7 +64,7 @@ else
           ;;
       esac
       ;;
-    mingw* | pw32* | os2*)
+    mingw* | cygwin* | pw32* | os2*)
       ;;
     hpux9* | hpux10* | hpux11*)
       wl='-Wl,'
@@ -74,7 +74,7 @@ else
       ;;
     newsos6)
       ;;
-    linux*)
+    linux* | k*bsd*-gnu)
       case $cc_basename in
         icc* | ecc*)
           wl='-Wl,'
@@ -100,7 +100,7 @@ else
     osf3* | osf4* | osf5*)
       wl='-Wl,'
       ;;
-    sco3.2v5*)
+    rdos*)
       ;;
     solaris*)
       wl='-Wl,'
@@ -108,11 +108,14 @@ else
     sunos4*)
       wl='-Qoption ld '
       ;;
-    sysv4 | sysv4.2uw2* | sysv4.3* | sysv5*)
+    sysv4 | sysv4.2uw2* | sysv4.3*)
       wl='-Wl,'
       ;;
     sysv4*MP*)
       ;;
+    sysv5* | unixware* | sco3.2v5* | sco5v6* | OpenUNIX*)
+      wl='-Wl,'
+      ;;
     unicos*)
       wl='-Wl,'
       ;;
@@ -189,11 +192,11 @@ if test "$with_gnu_ld" = yes; then
         ld_shlibs=no
       fi
       ;;
-    interix3*)
+    interix[3-9]*)
       hardcode_direct=no
       hardcode_libdir_flag_spec='${wl}-rpath,$libdir'
       ;;
-    linux*)
+    gnu* | linux* | k*bsd*-gnu)
       if $LD --help 2>&1 | grep ': supported targets:.* elf' > /dev/null; then
         :
       else
@@ -280,7 +283,7 @@ else
             strings "$collect2name" | grep resolve_lib_name >/dev/null
           then
             # We have reworked collect2
-            hardcode_direct=yes
+            :
           else
             # We have old collect2
             hardcode_direct=unsupported
@@ -359,7 +362,7 @@ else
       hardcode_direct=yes
       hardcode_minus_L=yes
       ;;
-    freebsd* | kfreebsd*-gnu | dragonfly*)
+    freebsd* | dragonfly*)
       hardcode_libdir_flag_spec='-R$libdir'
       hardcode_direct=yes
       ;;
@@ -412,18 +415,22 @@ else
       hardcode_libdir_separator=:
       ;;
     openbsd*)
-      hardcode_direct=yes
-      if test -z "`echo __ELF__ | $CC -E - | grep __ELF__`" || test "$host_os-$host_cpu" = "openbsd2.8-powerpc"; then
-        hardcode_libdir_flag_spec='${wl}-rpath,$libdir'
+      if test -f /usr/libexec/ld.so; then
+        hardcode_direct=yes
+        if test -z "`echo __ELF__ | $CC -E - | grep __ELF__`" || test "$host_os-$host_cpu" = "openbsd2.8-powerpc"; then
+          hardcode_libdir_flag_spec='${wl}-rpath,$libdir'
+        else
+          case "$host_os" in
+            openbsd[01].* | openbsd2.[0-7] | openbsd2.[0-7].*)
+              hardcode_libdir_flag_spec='-R$libdir'
+              ;;
+            *)
+              hardcode_libdir_flag_spec='${wl}-rpath,$libdir'
+              ;;
+          esac
+        fi
       else
-        case "$host_os" in
-          openbsd[01].* | openbsd2.[0-7] | openbsd2.[0-7].*)
-            hardcode_libdir_flag_spec='-R$libdir'
-            ;;
-          *)
-            hardcode_libdir_flag_spec='${wl}-rpath,$libdir'
-            ;;
-        esac
+        ld_shlibs=no
       fi
       ;;
     os2*)
@@ -471,7 +478,7 @@ else
         ld_shlibs=yes
       fi
       ;;
-    sysv4*uw2* | sysv5OpenUNIX* | sysv5UnixWare7.[01].[10]* | unixware7*)
+    sysv4*uw2* | sysv5OpenUNIX* | sysv5UnixWare7.[01].[10]* | unixware7* | sco3.2v5.0.[024]*)
       ;;
     sysv5* | sco3.2v5* | sco5v6*)
       hardcode_libdir_flag_spec='`test -z "$SCOABSPATH" && echo ${wl}-R,$libdir`'
@@ -488,33 +495,51 @@ fi
 
 # Check dynamic linker characteristics
 # Code taken from libtool.m4's AC_LIBTOOL_SYS_DYNAMIC_LINKER.
+# Unlike libtool.m4, here we don't care about _all_ names of the library, but
+# only about the one the linker finds when passed -lNAME. This is the last
+# element of library_names_spec in libtool.m4, or possibly two of them if the
+# linker has special search rules.
+library_names_spec=      # the last element of library_names_spec in libtool.m4
 libname_spec='lib$name'
 case "$host_os" in
   aix3*)
+    library_names_spec='$libname.a'
     ;;
   aix4* | aix5*)
+    library_names_spec='$libname$shrext'
     ;;
   amigaos*)
+    library_names_spec='$libname.a'
     ;;
   beos*)
+    library_names_spec='$libname$shrext'
     ;;
   bsdi[45]*)
+    library_names_spec='$libname$shrext'
     ;;
   cygwin* | mingw* | pw32*)
     shrext=.dll
+    library_names_spec='$libname.dll.a $libname.lib'
     ;;
   darwin* | rhapsody*)
     shrext=.dylib
+    library_names_spec='$libname$shrext'
     ;;
   dgux*)
+    library_names_spec='$libname$shrext'
     ;;
   freebsd1*)
     ;;
-  kfreebsd*-gnu)
-    ;;
   freebsd* | dragonfly*)
+    case "$host_os" in
+      freebsd[123]*)
+        library_names_spec='$libname$shrext$versuffix' ;;
+      *)
+        library_names_spec='$libname$shrext' ;;
+    esac
     ;;
   gnu*)
+    library_names_spec='$libname$shrext'
     ;;
   hpux9* | hpux10* | hpux11*)
     case $host_cpu in
@@ -528,10 +553,13 @@ case "$host_os" in
         shrext=.sl
         ;;
     esac
+    library_names_spec='$libname$shrext'
     ;;
-  interix3*)
+  interix[3-9]*)
+    library_names_spec='$libname$shrext'
     ;;
   irix5* | irix6* | nonstopux*)
+    library_names_spec='$libname$shrext'
     case "$host_os" in
       irix5* | nonstopux*)
         libsuff= shlibsuff=
@@ -548,41 +576,59 @@ case "$host_os" in
     ;;
   linux*oldld* | linux*aout* | linux*coff*)
     ;;
-  linux*)
+  linux* | k*bsd*-gnu)
+    library_names_spec='$libname$shrext'
     ;;
   knetbsd*-gnu)
+    library_names_spec='$libname$shrext'
     ;;
   netbsd*)
+    library_names_spec='$libname$shrext'
     ;;
   newsos6)
+    library_names_spec='$libname$shrext'
     ;;
   nto-qnx*)
+    library_names_spec='$libname$shrext'
     ;;
   openbsd*)
+    library_names_spec='$libname$shrext$versuffix'
     ;;
   os2*)
     libname_spec='$name'
     shrext=.dll
+    library_names_spec='$libname.a'
     ;;
   osf3* | osf4* | osf5*)
+    library_names_spec='$libname$shrext'
+    ;;
+  rdos*)
     ;;
   solaris*)
+    library_names_spec='$libname$shrext'
     ;;
   sunos4*)
+    library_names_spec='$libname$shrext$versuffix'
     ;;
   sysv4 | sysv4.3*)
+    library_names_spec='$libname$shrext'
     ;;
   sysv4*MP*)
+    library_names_spec='$libname$shrext'
     ;;
   sysv5* | sco3.2v5* | sco5v6* | unixware* | OpenUNIX* | sysv4*uw2*)
+    library_names_spec='$libname$shrext'
     ;;
   uts4*)
+    library_names_spec='$libname$shrext'
     ;;
 esac
 
 sed_quote_subst='s/\(["`$\\]\)/\\\1/g'
 escaped_wl=`echo "X$wl" | sed -e 's/^X//' -e "$sed_quote_subst"`
 shlibext=`echo "$shrext" | sed -e 's,^\.,,'`
+escaped_libname_spec=`echo "X$libname_spec" | sed -e 's/^X//' -e "$sed_quote_subst"`
+escaped_library_names_spec=`echo "X$library_names_spec" | sed -e 's/^X//' -e "$sed_quote_subst"`
 escaped_hardcode_libdir_flag_spec=`echo "X$hardcode_libdir_flag_spec" | sed -e 's/^X//' -e "$sed_quote_subst"`
 
 LC_ALL=C sed -e 's/^\([a-zA-Z0-9_]*\)=/acl_cv_\1=/' <<EOF
@@ -596,6 +642,12 @@ libext="$libext"
 # Shared library suffix (normally "so").
 shlibext="$shlibext"
 
+# Format of library name prefix.
+libname_spec="$escaped_libname_spec"
+
+# Library names that the linker finds when passed -lNAME.
+library_names_spec="$escaped_library_names_spec"
+
 # Flag to hardcode \$libdir into a binary during linking.
 # This must work even if \$libdir does not exist.
 hardcode_libdir_flag_spec="$escaped_hardcode_libdir_flag_spec"
diff --git a/build-aux/maint.mk b/build-aux/maint.mk
index a7a5a28f87..662b37174f 100644
--- a/build-aux/maint.mk
+++ b/build-aux/maint.mk
@@ -30,7 +30,7 @@ C_SOURCES += $(C_SOURCES_ADD)
 # Do not save the original name or timestamp in the .tar.gz file.
 # Use --rsyncable if available.
 gzip_rsyncable := \
-  $(shell gzip --help|grep rsyncable >/dev/null && echo --rsyncable)
+  $(shell gzip --help 2>/dev/null|grep rsyncable >/dev/null && echo --rsyncable)
 GZIP_ENV = '--no-name --best $(gzip_rsyncable)'
 
 # Prevent programs like 'sort' from considering distinct strings to be equal.
diff --git a/gl/error.c b/gl/error.c
index 9cf67ff904..3177bd5d2c 100644
--- a/gl/error.c
+++ b/gl/error.c
@@ -2,19 +2,18 @@
    Copyright (C) 1990-1998, 2000-2007 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
-   This program is free software; you can redistribute it and/or modify
+   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
-   the Free Software Foundation; either version 2, or (at your option)
-   any later version.
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
 
    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.
 
-   You should have received a copy of the GNU General Public License along
-   with this program; if not, write to the Free Software Foundation,
-   Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
 /* Written by David MacKenzie <djm@gnu.ai.mit.edu>.  */
 
diff --git a/gl/error.h b/gl/error.h
index 5a5f247658..8c215a7fd3 100644
--- a/gl/error.h
+++ b/gl/error.h
@@ -2,19 +2,18 @@
    Copyright (C) 1995, 1996, 1997, 2003, 2006 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
-   This program is free software; you can redistribute it and/or modify
+   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
-   the Free Software Foundation; either version 2, or (at your option)
-   any later version.
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
 
    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.
 
-   You should have received a copy of the GNU General Public License along
-   with this program; if not, write to the Free Software Foundation,
-   Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
 #ifndef _ERROR_H
 #define _ERROR_H 1
diff --git a/gl/fseeko.c b/gl/fseeko.c
index 209ce9c690..48c833b840 100644
--- a/gl/fseeko.c
+++ b/gl/fseeko.c
@@ -90,6 +90,10 @@ rpl_fseeko (FILE *fp, off_t offset, int whence)
        || fp->__bufpos == fp->__bufstart)
       && ((fp->__modeflags & (__FLAG_READONLY | __FLAG_READING)) == 0
 	  || fp->__bufpos == fp->__bufread))
+#elif defined __QNX__               /* QNX */
+  if ((fp->_Mode & _MWRITE ? fp->_Next == fp->_Buf : fp->_Next == fp->_Rend)
+      && fp->_Rback == fp->_Back + sizeof (fp->_Back)
+      && fp->_Rsave == NULL)
 #else
   #error "Please port gnulib fseeko.c to your platform! Look at the code in fpurge.c, then report this to bug-gnulib."
 #endif
diff --git a/gl/gnulib.mk b/gl/gnulib.mk
index f727afe883..74a060f439 100644
--- a/gl/gnulib.mk
+++ b/gl/gnulib.mk
@@ -126,6 +126,13 @@ EXTRA_libgnu_la_SOURCES += inet_pton.c
 
 ## end   gnulib module inet_pton
 
+## begin gnulib module intprops
+
+
+EXTRA_DIST += intprops.h
+
+## end   gnulib module intprops
+
 ## begin gnulib module lseek
 
 
@@ -147,20 +154,20 @@ BUILT_SOURCES += $(NETINET_IN_H)
 
 # We need the following in order to create <netinet/in.h> when the system
 # doesn't have one.
-netinet/in.h:
+netinet/in.h: netinet_in.in.h
 	@MKDIR_P@ netinet
 	rm -f $@-t $@
 	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
 	  sed -e 's/@''INCLUDE_NEXT''@/$(INCLUDE_NEXT)/g' \
 	      -e 's|@''NEXT_NETINET_IN_H''@|$(NEXT_NETINET_IN_H)|g' \
 	      -e 's|@''HAVE_NETINET_IN_H''@|$(HAVE_NETINET_IN_H)|g' \
-	      < $(srcdir)/netinet_in_.h; \
+	      < $(srcdir)/netinet_in.in.h; \
 	} > $@-t
 	mv $@-t $@
 MOSTLYCLEANFILES += netinet/in.h netinet/in.h-t
 MOSTLYCLEANDIRS += netinet
 
-EXTRA_DIST += netinet_in_.h
+EXTRA_DIST += netinet_in.in.h
 
 ## end   gnulib module netinet_in
 
@@ -188,6 +195,15 @@ EXTRA_libgnu_la_SOURCES += strdup.c
 
 ## end   gnulib module strdup
 
+## begin gnulib module strerror
+
+
+EXTRA_DIST += strerror.c
+
+EXTRA_libgnu_la_SOURCES += strerror.c
+
+## end   gnulib module strerror
+
 ## begin gnulib module version-etc
 
 libgnu_la_SOURCES += version-etc.h version-etc.c
diff --git a/gl/inet_pton.c b/gl/inet_pton.c
index 5ec88a43ac..6cbf8cb2bd 100644
--- a/gl/inet_pton.c
+++ b/gl/inet_pton.c
@@ -2,10 +2,10 @@
 
    Copyright (C) 2006 Free Software Foundation, Inc.
 
-   This program is free software; you can redistribute it and/or modify
+   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
-   the Free Software Foundation; either version 2, or (at your option)
-   any later version.
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
 
    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -13,8 +13,7 @@
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
-   along with this program; if not, write to the Free Software Foundation,
-   Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
 /*
  * Copyright (c) 1996,1999 by Internet Software Consortium.
diff --git a/gl/inet_pton.h b/gl/inet_pton.h
index 70f1c4b056..3335cb8cfa 100644
--- a/gl/inet_pton.h
+++ b/gl/inet_pton.h
@@ -1,10 +1,10 @@
 /* Convert internet address from text to binary format.
    Copyright (C) 2005, 2006 Free Software Foundation, Inc.
 
-   This program is free software; you can redistribute it and/or modify
+   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
-   the Free Software Foundation; either version 2, or (at your option)
-   any later version.
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
 
    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -12,8 +12,7 @@
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
-   along with this program; if not, write to the Free Software Foundation,
-   Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
 #include <sys/types.h>
 #include <sys/socket.h>
diff --git a/gl/intprops.h b/gl/intprops.h
new file mode 100644
index 0000000000..002161ee57
--- /dev/null
+++ b/gl/intprops.h
@@ -0,0 +1,77 @@
+/* intprops.h -- properties of integer types
+
+   Copyright (C) 2001, 2002, 2003, 2004, 2005 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
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+/* Written by Paul Eggert.  */
+
+#include <limits.h>
+
+/* The extra casts in the following macros work around compiler bugs,
+   e.g., in Cray C 5.0.3.0.  */
+
+/* True if the arithmetic type T is an integer type.  bool counts as
+   an integer.  */
+#define TYPE_IS_INTEGER(t) ((t) 1.5 == 1)
+
+/* True if negative values of the signed integer type T use two's
+   complement, ones' complement, or signed magnitude representation,
+   respectively.  Much GNU code assumes two's complement, but some
+   people like to be portable to all possible C hosts.  */
+#define TYPE_TWOS_COMPLEMENT(t) ((t) ~ (t) 0 == (t) -1)
+#define TYPE_ONES_COMPLEMENT(t) ((t) ~ (t) 0 == 0)
+#define TYPE_SIGNED_MAGNITUDE(t) ((t) ~ (t) 0 < (t) -1)
+
+/* True if the arithmetic type T is signed.  */
+#define TYPE_SIGNED(t) (! ((t) 0 < (t) -1))
+
+/* The maximum and minimum values for the integer type T.  These
+   macros have undefined behavior if T is signed and has padding bits.
+   If this is a problem for you, please let us know how to fix it for
+   your host.  */
+#define TYPE_MINIMUM(t) \
+  ((t) (! TYPE_SIGNED (t) \
+	? (t) 0 \
+	: TYPE_SIGNED_MAGNITUDE (t) \
+	? ~ (t) 0 \
+	: ~ (t) 0 << (sizeof (t) * CHAR_BIT - 1)))
+#define TYPE_MAXIMUM(t) \
+  ((t) (! TYPE_SIGNED (t) \
+	? (t) -1 \
+	: ~ (~ (t) 0 << (sizeof (t) * CHAR_BIT - 1))))
+
+/* Return zero if T can be determined to be an unsigned type.
+   Otherwise, return 1.
+   When compiling with GCC, INT_STRLEN_BOUND uses this macro to obtain a
+   tighter bound.  Otherwise, it overestimates the true bound by one byte
+   when applied to unsigned types of size 2, 4, 16, ... bytes.
+   The symbol signed_type_or_expr__ is private to this header file.  */
+#if __GNUC__ >= 2
+# define signed_type_or_expr__(t) TYPE_SIGNED (__typeof__ (t))
+#else
+# define signed_type_or_expr__(t) 1
+#endif
+
+/* Bound on length of the string representing an integer type or expression T.
+   Subtract 1 for the sign bit if T is signed; log10 (2.0) < 146/485;
+   add 1 for integer division truncation; add 1 more for a minus sign
+   if needed.  */
+#define INT_STRLEN_BOUND(t) \
+  ((sizeof (t) * CHAR_BIT - signed_type_or_expr__ (t)) * 146 / 485 \
+   + signed_type_or_expr__ (t) + 1)
+
+/* Bound on buffer size needed to represent an integer type or expression T,
+   including the terminating null.  */
+#define INT_BUFSIZE_BOUND(t) (INT_STRLEN_BOUND (t) + 1)
diff --git a/gl/m4/extensions.m4 b/gl/m4/extensions.m4
new file mode 100644
index 0000000000..bcbb3ceee2
--- /dev/null
+++ b/gl/m4/extensions.m4
@@ -0,0 +1,82 @@
+# serial 5  -*- Autoconf -*-
+# Enable extensions on systems that normally disable them.
+
+# Copyright (C) 2003, 2006, 2007 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.
+
+# This definition of AC_USE_SYSTEM_EXTENSIONS is stolen from CVS
+# Autoconf.  Perhaps we can remove this once we can assume Autoconf
+# 2.62 or later everywhere, but since CVS Autoconf mutates rapidly
+# enough in this area it's likely we'll need to redefine
+# AC_USE_SYSTEM_EXTENSIONS for quite some time.
+
+# AC_USE_SYSTEM_EXTENSIONS
+# ------------------------
+# Enable extensions on systems that normally disable them,
+# typically due to standards-conformance issues.
+# Remember that #undef in AH_VERBATIM gets replaced with #define by
+# AC_DEFINE.  The goal here is to define all known feature-enabling
+# macros, then, if reports of conflicts are made, disable macros that
+# cause problems on some platforms (such as __EXTENSIONS__).
+AC_DEFUN([AC_USE_SYSTEM_EXTENSIONS],
+[AC_BEFORE([$0], [AC_COMPILE_IFELSE])dnl
+AC_BEFORE([$0], [AC_RUN_IFELSE])dnl
+
+  AC_CHECK_HEADER([minix/config.h], [MINIX=yes], [MINIX=])
+  if test "$MINIX" = yes; then
+    AC_DEFINE([_POSIX_SOURCE], [1],
+      [Define to 1 if you need to in order for `stat' and other
+       things to work.])
+    AC_DEFINE([_POSIX_1_SOURCE], [2],
+      [Define to 2 if the system does not provide POSIX.1 features
+       except with this defined.])
+    AC_DEFINE([_MINIX], [1],
+      [Define to 1 if on MINIX.])
+  fi
+
+  AH_VERBATIM([__EXTENSIONS__],
+[/* Enable extensions on AIX 3, Interix.  */
+#ifndef _ALL_SOURCE
+# undef _ALL_SOURCE
+#endif
+/* Enable GNU extensions on systems that have them.  */
+#ifndef _GNU_SOURCE
+# undef _GNU_SOURCE
+#endif
+/* Enable threading extensions on Solaris.  */
+#ifndef _POSIX_PTHREAD_SEMANTICS
+# undef _POSIX_PTHREAD_SEMANTICS
+#endif
+/* Enable extensions on HP NonStop.  */
+#ifndef _TANDEM_SOURCE
+# undef _TANDEM_SOURCE
+#endif
+/* Enable general extensions on Solaris.  */
+#ifndef __EXTENSIONS__
+# undef __EXTENSIONS__
+#endif
+])
+  AC_CACHE_CHECK([whether it is safe to define __EXTENSIONS__],
+    [ac_cv_safe_to_define___extensions__],
+    [AC_COMPILE_IFELSE(
+       [AC_LANG_PROGRAM([
+#	  define __EXTENSIONS__ 1
+	  AC_INCLUDES_DEFAULT])],
+       [ac_cv_safe_to_define___extensions__=yes],
+       [ac_cv_safe_to_define___extensions__=no])])
+  test $ac_cv_safe_to_define___extensions__ = yes &&
+    AC_DEFINE([__EXTENSIONS__])
+  AC_DEFINE([_ALL_SOURCE])
+  AC_DEFINE([_GNU_SOURCE])
+  AC_DEFINE([_POSIX_PTHREAD_SEMANTICS])
+  AC_DEFINE([_TANDEM_SOURCE])
+])# AC_USE_SYSTEM_EXTENSIONS
+
+# gl_USE_SYSTEM_EXTENSIONS
+# ------------------------
+# Enable extensions on systems that normally disable them,
+# typically due to standards-conformance issues.
+AC_DEFUN([gl_USE_SYSTEM_EXTENSIONS],
+  [AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])])
diff --git a/gl/m4/getaddrinfo.m4 b/gl/m4/getaddrinfo.m4
index 4a1e09f775..5d36c19505 100644
--- a/gl/m4/getaddrinfo.m4
+++ b/gl/m4/getaddrinfo.m4
@@ -1,4 +1,4 @@
-# getaddrinfo.m4 serial 12
+# getaddrinfo.m4 serial 15
 dnl Copyright (C) 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -9,8 +9,23 @@ AC_DEFUN([gl_GETADDRINFO],
   AC_REQUIRE([gl_HEADER_SYS_SOCKET])dnl for HAVE_SYS_SOCKET_H, HAVE_WINSOCK2_H
   AC_MSG_NOTICE([checking how to do getaddrinfo, freeaddrinfo and getnameinfo])
 
+  AC_CHECK_HEADERS_ONCE(netdb.h)
+
   AC_SEARCH_LIBS(getaddrinfo, [nsl socket])
-  AC_CHECK_FUNCS(getaddrinfo,, [
+  AC_CACHE_CHECK([for getaddrinfo], [gl_cv_func_getaddrinfo], [
+    AC_TRY_LINK([
+#include <sys/types.h>
+#ifdef HAVE_SYS_SOCKET_H
+#include <sys/socket.h>
+#endif
+#ifdef HAVE_NETDB_H
+#include <netdb.h>
+#endif
+#include <stddef.h>
+], [getaddrinfo("", "", NULL, NULL);],
+      [gl_cv_func_getaddrinfo=yes],
+      [gl_cv_func_getaddrinfo=no])])
+  if test $gl_cv_func_getaddrinfo = no; then
     AC_CACHE_CHECK(for getaddrinfo in ws2tcpip.h and -lws2_32,
 		   gl_cv_w32_getaddrinfo, [
       gl_cv_w32_getaddrinfo=no
@@ -20,19 +35,19 @@ AC_DEFUN([gl_GETADDRINFO],
 #ifdef HAVE_WS2TCPIP_H
 #include <ws2tcpip.h>
 #endif
-], [getaddrinfo(0, 0, 0, 0);], gl_cv_w32_getaddrinfo=yes)
+#include <stddef.h>
+], [getaddrinfo(NULL, NULL, NULL, NULL);], gl_cv_w32_getaddrinfo=yes)
     LIBS="$am_save_LIBS"])
     if test "$gl_cv_w32_getaddrinfo" = "yes"; then
       LIBS="$LIBS -lws2_32"
     else
       AC_LIBOBJ(getaddrinfo)
     fi
-    ])
+  fi
 
   # We can't use AC_REPLACE_FUNCS here because gai_strerror may be an
   # inline function declared in ws2tcpip.h, so we need to get that
   # header included somehow.
-  AC_CHECK_HEADERS_ONCE(netdb.h)
   AC_CACHE_CHECK([for gai_strerror (possibly via ws2tcpip.h)],
     gl_cv_func_gai_strerror, [
       AC_TRY_LINK([
@@ -46,7 +61,8 @@ AC_DEFUN([gl_GETADDRINFO],
 #ifdef HAVE_WS2TCPIP_H
 #include <ws2tcpip.h>
 #endif
-], [gai_strerror (0);],
+#include <stddef.h>
+], [gai_strerror (NULL);],
         [gl_cv_func_gai_strerror=yes],
         [gl_cv_func_gai_strerror=no])])
   if test $gl_cv_func_gai_strerror = no; then
@@ -71,7 +87,8 @@ AC_DEFUN([gl_PREREQ_GETADDRINFO], [
 #ifdef HAVE_WINSOCK2_H
 #include <winsock2.h>
 #endif
-], [gethostbyname(0);], gl_cv_w32_gethostbyname=yes)
+#include <stddef.h>
+], [gethostbyname(NULL);], gl_cv_w32_gethostbyname=yes)
     LIBS="$am_save_LIBS"])
     if test "$gl_cv_w32_gethostbyname" = "yes"; then
       LIBS="$LIBS -lws2_32"
@@ -81,7 +98,7 @@ AC_DEFUN([gl_PREREQ_GETADDRINFO], [
   AC_REQUIRE([gl_SOCKET_FAMILIES])
   AC_REQUIRE([gl_HEADER_SYS_SOCKET])
   AC_REQUIRE([AC_C_INLINE])
-  AC_REQUIRE([AC_GNU_SOURCE])
+  AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
   AC_CHECK_HEADERS_ONCE(netinet/in.h netdb.h)
   AC_CHECK_DECLS([getaddrinfo, freeaddrinfo, gai_strerror, getnameinfo],,,[
   /* sys/types.h is not needed according to POSIX, but the
diff --git a/gl/m4/getdelim.m4 b/gl/m4/getdelim.m4
index 7f6e3b41f7..d81be22a72 100644
--- a/gl/m4/getdelim.m4
+++ b/gl/m4/getdelim.m4
@@ -1,4 +1,4 @@
-# getdelim.m4 serial 3
+# getdelim.m4 serial 4
 
 dnl Copyright (C) 2005, 2006, 2007 Free Software dnl Foundation, Inc.
 dnl
@@ -13,7 +13,7 @@ AC_DEFUN([gl_FUNC_GETDELIM],
   AC_REQUIRE([gl_STDIO_H_DEFAULTS])
 
   dnl Persuade glibc <stdio.h> to declare getdelim().
-  AC_REQUIRE([AC_GNU_SOURCE])
+  AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
 
   AC_REPLACE_FUNCS([getdelim])
   AC_CHECK_DECLS_ONCE([getdelim])
diff --git a/gl/m4/getline.m4 b/gl/m4/getline.m4
index 11949b71cc..afd77669ad 100644
--- a/gl/m4/getline.m4
+++ b/gl/m4/getline.m4
@@ -1,4 +1,4 @@
-# getline.m4 serial 16
+# getline.m4 serial 17
 
 dnl Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2005, 2006, 2007 Free
 dnl Software Foundation, Inc.
@@ -18,7 +18,7 @@ AC_DEFUN([gl_FUNC_GETLINE],
   AC_REQUIRE([gl_STDIO_H_DEFAULTS])
 
   dnl Persuade glibc <stdio.h> to declare getline().
-  AC_REQUIRE([AC_GNU_SOURCE])
+  AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
 
   AC_CHECK_DECLS_ONCE([getline])
 
diff --git a/gl/m4/gnulib-comp.m4 b/gl/m4/gnulib-comp.m4
index fcade33317..1eec4134cb 100644
--- a/gl/m4/gnulib-comp.m4
+++ b/gl/m4/gnulib-comp.m4
@@ -26,6 +26,7 @@ AC_DEFUN([gl_EARLY],
   m4_pattern_allow([^gl_LTLIBOBJS$])dnl a variable
   AC_REQUIRE([AC_PROG_RANLIB])
   AC_REQUIRE([AC_GNU_SOURCE])
+  AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
   AC_REQUIRE([AC_FUNC_FSEEKO])
   dnl Some compilers (e.g., AIX 5.3 cc) need to be in c99 mode
   dnl for the builtin va_copy to work.  With Autoconf 2.60 or later,
@@ -66,6 +67,8 @@ AC_DEFUN([gl_INIT],
   gl_STDARG_H
   gl_FUNC_STRDUP
   gl_STRING_MODULE_INDICATOR([strdup])
+  gl_FUNC_STRERROR
+  gl_STRING_MODULE_INDICATOR([strerror])
   m4_popdef([AC_LIBSOURCES])
   m4_popdef([AC_REPLACE_FUNCS])
   m4_popdef([AC_LIBOBJ])
@@ -87,18 +90,31 @@ AC_DEFUN([gl_INIT],
 
 # Like AC_LIBOBJ, except that the module name goes
 # into gl_LIBOBJS instead of into LIBOBJS.
-AC_DEFUN([gl_LIBOBJ],
-  [gl_LIBOBJS="$gl_LIBOBJS $1.$ac_objext"])
+AC_DEFUN([gl_LIBOBJ], [
+  AS_LITERAL_IF([$1], [gl_LIBSOURCES([$1.c])])dnl
+  gl_LIBOBJS="$gl_LIBOBJS $1.$ac_objext"
+])
 
 # Like AC_REPLACE_FUNCS, except that the module name goes
 # into gl_LIBOBJS instead of into LIBOBJS.
-AC_DEFUN([gl_REPLACE_FUNCS],
-  [AC_CHECK_FUNCS([$1], , [gl_LIBOBJ($ac_func)])])
+AC_DEFUN([gl_REPLACE_FUNCS], [
+  m4_foreach_w([gl_NAME], [$1], [AC_LIBSOURCES(gl_NAME[.c])])dnl
+  AC_CHECK_FUNCS([$1], , [gl_LIBOBJ($ac_func)])
+])
 
-# Like AC_LIBSOURCES, except that it does nothing.
-# We rely on EXTRA_lib..._SOURCES instead.
-AC_DEFUN([gl_LIBSOURCES],
-  [])
+# Like AC_LIBSOURCES, except the directory where the source file is
+# expected is derived from the gnulib-tool parametrization,
+# and alloca is special cased (for the alloca-opt module).
+# We could also entirely rely on EXTRA_lib..._SOURCES.
+AC_DEFUN([gl_LIBSOURCES], [
+  m4_foreach([_gl_NAME], [$1], [
+    m4_if(_gl_NAME, [alloca.c], [], [
+      m4_syscmd([test -r gl/]_gl_NAME[ || test ! -d gl])dnl
+      m4_if(m4_sysval, [0], [],
+        [AC_FATAL([missing gl/]_gl_NAME)])
+    ])
+  ])
+])
 
 # This macro records the list of files which have been installed by
 # gnulib-tool and may be removed by future gnulib-tool invocations.
@@ -125,18 +141,21 @@ AC_DEFUN([gl_FILE_LIST], [
   lib/inet_ntop.h
   lib/inet_pton.c
   lib/inet_pton.h
+  lib/intprops.h
   lib/lseek.c
-  lib/netinet_in_.h
+  lib/netinet_in.in.h
   lib/progname.c
   lib/progname.h
   lib/readline.c
   lib/readline.h
   lib/strdup.c
+  lib/strerror.c
   lib/version-etc-fsf.c
   lib/version-etc.c
   lib/version-etc.h
   m4/arpa_inet_h.m4
   m4/error.m4
+  m4/extensions.m4
   m4/fseeko.m4
   m4/getaddrinfo.m4
   m4/getdelim.m4
@@ -155,4 +174,5 @@ AC_DEFUN([gl_FILE_LIST], [
   m4/socklen.m4
   m4/stdarg.m4
   m4/strdup.m4
+  m4/strerror.m4
 ])
diff --git a/gl/m4/socklen.m4 b/gl/m4/socklen.m4
index d39a314e17..b755757be4 100644
--- a/gl/m4/socklen.m4
+++ b/gl/m4/socklen.m4
@@ -1,4 +1,4 @@
-# socklen.m4 serial 5
+# socklen.m4 serial 6
 dnl Copyright (C) 2005, 2006, 2007 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -12,7 +12,7 @@ dnl types for the argument to getsockopt, getpeername, etc.  So we
 dnl have to test to find something that will work.
 
 dnl On mingw32, socklen_t is in ws2tcpip.h ('int'), so we try to find
-dnl it there first.  That file is included by gnulib's sys_socket_.h, which
+dnl it there first.  That file is included by gnulib's sys_socket.in.h, which
 dnl all users of this module should include.  Cygwin must not include
 dnl ws2tcpip.h.
 AC_DEFUN([gl_TYPE_SOCKLEN_T],
diff --git a/gl/m4/strerror.m4 b/gl/m4/strerror.m4
new file mode 100644
index 0000000000..9cb5769b12
--- /dev/null
+++ b/gl/m4/strerror.m4
@@ -0,0 +1,46 @@
+# strerror.m4 serial 6
+dnl Copyright (C) 2002, 2007 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([gl_FUNC_STRERROR],
+[
+  AC_REQUIRE([gl_FUNC_STRERROR_SEPARATE])
+  if test $gl_cv_func_working_strerror = no; then
+    AC_LIBOBJ([strerror])
+    AC_DEFINE_UNQUOTED([REPLACE_STRERROR], [$REPLACE_STRERROR],
+      [Define this to 1 if strerror is broken.])
+  fi
+])
+
+# Like gl_FUNC_STRERROR, except prepare for separate compilation (no AC_LIBOBJ).
+AC_DEFUN([gl_FUNC_STRERROR_SEPARATE],
+[
+  AC_CACHE_CHECK([for working strerror function],
+   [gl_cv_func_working_strerror],
+   [AC_RUN_IFELSE(
+      [AC_LANG_PROGRAM(
+	 [#include <string.h>
+	 ],
+	 [return !*strerror (-2);])],
+      [gl_cv_func_working_strerror=yes],
+      [gl_cv_func_working_strerror=no],
+      [dnl Assume crossbuild works if it compiles.
+       AC_COMPILE_IFELSE(
+	 [AC_LANG_PROGRAM(
+	    [#include <string.h>
+	    ],
+	    [return !*strerror (-2);])],
+	 [gl_cv_func_working_strerror=yes],
+	 [gl_cv_func_working_strerror=no])])])
+  if test $gl_cv_func_working_strerror = no ; then
+    REPLACE_STRERROR=1
+    gl_PREREQ_STRERROR
+  fi
+])
+
+# Prerequisites of lib/strerror.c.
+AC_DEFUN([gl_PREREQ_STRERROR], [
+  AC_CHECK_DECLS([strerror])
+])
diff --git a/gl/netinet_in_.h b/gl/netinet_in.in.h
index aa00e45ced..aa00e45ced 100644
--- a/gl/netinet_in_.h
+++ b/gl/netinet_in.in.h
diff --git a/gl/progname.c b/gl/progname.c
index df52f60921..fa5aa8bec7 100644
--- a/gl/progname.c
+++ b/gl/progname.c
@@ -2,10 +2,10 @@
    Copyright (C) 2001-2003, 2005-2006 Free Software Foundation, Inc.
    Written by Bruno Haible <haible@clisp.cons.org>, 2001.
 
-   This program is free software; you can redistribute it and/or modify
+   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
-   the Free Software Foundation; either version 2, or (at your option)
-   any later version.
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
 
    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -13,8 +13,7 @@
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
-   along with this program; if not, write to the Free Software Foundation,
-   Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
 
 #include <config.h>
diff --git a/gl/progname.h b/gl/progname.h
index 206c2cc063..82615c6bc0 100644
--- a/gl/progname.h
+++ b/gl/progname.h
@@ -2,10 +2,10 @@
    Copyright (C) 2001-2004, 2006 Free Software Foundation, Inc.
    Written by Bruno Haible <haible@clisp.cons.org>, 2001.
 
-   This program is free software; you can redistribute it and/or modify
+   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
-   the Free Software Foundation; either version 2, or (at your option)
-   any later version.
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
 
    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -13,8 +13,7 @@
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
-   along with this program; if not, write to the Free Software Foundation,
-   Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
 #ifndef _PROGNAME_H
 #define _PROGNAME_H
diff --git a/gl/readline.c b/gl/readline.c
index 1eadabd971..a8db7ec68e 100644
--- a/gl/readline.c
+++ b/gl/readline.c
@@ -2,10 +2,10 @@
    Copyright (C) 2005, 2006, 2007 Free Software Foundation, Inc.
    Written by Simon Josefsson
 
-   This program is free software; you can redistribute it and/or modify
+   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
-   the Free Software Foundation; either version 2, or (at your option)
-   any later version.
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
 
    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -13,8 +13,7 @@
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
-   along with this program; if not, write to the Free Software Foundation,
-   Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
 #include <config.h>
 
diff --git a/gl/readline.h b/gl/readline.h
index a5d339acc1..04b3adb478 100644
--- a/gl/readline.h
+++ b/gl/readline.h
@@ -2,10 +2,10 @@
    Copyright (C) 2005 Free Software Foundation, Inc.
    Written by Simon Josefsson
 
-   This program is free software; you can redistribute it and/or modify
+   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
-   the Free Software Foundation; either version 2, or (at your option)
-   any later version.
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
 
    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -13,8 +13,7 @@
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
-   along with this program; if not, write to the Free Software Foundation,
-   Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
 #ifndef GL_READLINE_H
 #define GL_READLINE_H
diff --git a/gl/strerror.c b/gl/strerror.c
new file mode 100644
index 0000000000..9b9ffd104d
--- /dev/null
+++ b/gl/strerror.c
@@ -0,0 +1,49 @@
+/* strerror.c --- POSIX compatible system error routine
+
+   Copyright (C) 2007 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
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include <string.h>
+
+#if REPLACE_STRERROR
+
+# include <stdio.h>
+
+# include "intprops.h"
+
+# undef strerror
+# if ! HAVE_DECL_STRERROR
+#  define strerror(n) NULL
+# endif
+
+char *
+rpl_strerror (int n)
+{
+  char *result = strerror (n);
+
+  if (! result)
+    {
+      static char const fmt[] = "Unknown error (%d)";
+      static char mesg[sizeof fmt + INT_STRLEN_BOUND (n)];
+      sprintf (mesg, fmt, n);
+      return mesg;
+    }
+
+  return result;
+}
+
+#endif
diff --git a/gl/version-etc-fsf.c b/gl/version-etc-fsf.c
index f25eb653ea..4c0d174d63 100644
--- a/gl/version-etc-fsf.c
+++ b/gl/version-etc-fsf.c
@@ -1,10 +1,10 @@
 /* Variable with FSF copyright information, for version-etc.
    Copyright (C) 1999-2006 Free Software Foundation, Inc.
 
-   This program is free software; you can redistribute it and/or modify
+   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
-   the Free Software Foundation; either version 2, or (at your option)
-   any later version.
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
 
    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -12,8 +12,7 @@
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
-   along with this program; if not, write to the Free Software Foundation,
-   Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
 /* Written by Jim Meyering. */
 
diff --git a/gl/version-etc.c b/gl/version-etc.c
index 1ae82c4179..23eb92fa49 100644
--- a/gl/version-etc.c
+++ b/gl/version-etc.c
@@ -1,10 +1,10 @@
 /* Utility to help print --version output in a consistent format.
    Copyright (C) 1999-2007 Free Software Foundation, Inc.
 
-   This program is free software; you can redistribute it and/or modify
+   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
-   the Free Software Foundation; either version 2, or (at your option)
-   any later version.
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
 
    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -12,8 +12,7 @@
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
-   along with this program; if not, write to the Free Software Foundation,
-   Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
 /* Written by Jim Meyering. */
 
diff --git a/gl/version-etc.h b/gl/version-etc.h
index 84da535001..d9d1340eb5 100644
--- a/gl/version-etc.h
+++ b/gl/version-etc.h
@@ -1,10 +1,10 @@
 /* Utility to help print --version output in a consistent format.
    Copyright (C) 1999, 2003, 2005 Free Software Foundation, Inc.
 
-   This program is free software; you can redistribute it and/or modify
+   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
-   the Free Software Foundation; either version 2, or (at your option)
-   any later version.
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
 
    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -12,8 +12,7 @@
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
-   along with this program; if not, write to the Free Software Foundation,
-   Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
 /* Written by Jim Meyering. */
 
diff --git a/lgl/Makefile.am b/lgl/Makefile.am
index 703701a48a..ca8f208d6a 100644
--- a/lgl/Makefile.am
+++ b/lgl/Makefile.am
@@ -50,14 +50,14 @@ BUILT_SOURCES += $(ALLOCA_H)
 
 # We need the following in order to create <alloca.h> when the system
 # doesn't have one that works with the given compiler.
-alloca.h: alloca_.h
+alloca.h: alloca.in.h
 	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
-	  cat $(srcdir)/alloca_.h; \
+	  cat $(srcdir)/alloca.in.h; \
 	} > $@-t
 	mv -f $@-t $@
 MOSTLYCLEANFILES += alloca.h alloca.h-t
 
-EXTRA_DIST += alloca_.h
+EXTRA_DIST += alloca.in.h
 
 ## end   gnulib module alloca-opt
 
@@ -179,17 +179,17 @@ BUILT_SOURCES += $(FLOAT_H)
 
 # We need the following in order to create <float.h> when the system
 # doesn't have one that works with the given compiler.
-float.h: float_.h
+float.h: float.in.h
 	rm -f $@-t $@
 	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */' && \
 	  sed -e 's/@''INCLUDE_NEXT''@/$(INCLUDE_NEXT)/g' \
 	      -e 's|@''NEXT_FLOAT_H''@|$(NEXT_FLOAT_H)|g' \
-	      < $(srcdir)/float_.h; \
+	      < $(srcdir)/float.in.h; \
 	} > $@-t
 	mv $@-t $@
 MOSTLYCLEANFILES += float.h float.h-t
 
-EXTRA_DIST += float_.h
+EXTRA_DIST += float.in.h
 
 ## end   gnulib module float
 
@@ -293,15 +293,15 @@ BUILT_SOURCES += $(STDBOOL_H)
 
 # We need the following in order to create <stdbool.h> when the system
 # doesn't have one that works.
-stdbool.h: stdbool_.h
+stdbool.h: stdbool.in.h
 	rm -f $@-t $@
 	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
-	  sed -e 's/@''HAVE__BOOL''@/$(HAVE__BOOL)/g' < $(srcdir)/stdbool_.h; \
+	  sed -e 's/@''HAVE__BOOL''@/$(HAVE__BOOL)/g' < $(srcdir)/stdbool.in.h; \
 	} > $@-t
 	mv $@-t $@
 MOSTLYCLEANFILES += stdbool.h stdbool.h-t
 
-EXTRA_DIST += stdbool_.h
+EXTRA_DIST += stdbool.in.h
 
 ## end   gnulib module stdbool
 
@@ -311,7 +311,7 @@ BUILT_SOURCES += $(STDINT_H)
 
 # We need the following in order to create <stdint.h> when the system
 # doesn't have one that works with the given compiler.
-stdint.h: stdint_.h
+stdint.h: stdint.in.h
 	rm -f $@-t $@
 	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
 	  sed -e 's/@''HAVE_STDINT_H''@/$(HAVE_STDINT_H)/g' \
@@ -336,12 +336,12 @@ stdint.h: stdint_.h
 	      -e 's/@''BITSIZEOF_WINT_T''@/$(BITSIZEOF_WINT_T)/g' \
 	      -e 's/@''HAVE_SIGNED_WINT_T''@/$(HAVE_SIGNED_WINT_T)/g' \
 	      -e 's/@''WINT_T_SUFFIX''@/$(WINT_T_SUFFIX)/g' \
-	      < $(srcdir)/stdint_.h; \
+	      < $(srcdir)/stdint.in.h; \
 	} > $@-t
 	mv $@-t $@
 MOSTLYCLEANFILES += stdint.h stdint.h-t
 
-EXTRA_DIST += stdint_.h
+EXTRA_DIST += stdint.in.h
 
 ## end   gnulib module stdint
 
@@ -351,7 +351,7 @@ BUILT_SOURCES += stdio.h
 
 # We need the following in order to create <stdio.h> when the system
 # doesn't have one that works with the given compiler.
-stdio.h: stdio_.h
+stdio.h: stdio.in.h
 	rm -f $@-t $@
 	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */' && \
 	  sed -e 's/@''INCLUDE_NEXT''@/$(INCLUDE_NEXT)/g' \
@@ -365,6 +365,8 @@ stdio.h: stdio_.h
 	      -e 's|@''GNULIB_VSNPRINTF''@|$(GNULIB_VSNPRINTF)|g' \
 	      -e 's|@''GNULIB_VSPRINTF_POSIX''@|$(GNULIB_VSPRINTF_POSIX)|g' \
 	      -e 's|@''GNULIB_VASPRINTF''@|$(GNULIB_VASPRINTF)|g' \
+	      -e 's|@''GNULIB_FOPEN''@|$(GNULIB_FOPEN)|g' \
+	      -e 's|@''GNULIB_FREOPEN''@|$(GNULIB_FREOPEN)|g' \
 	      -e 's|@''GNULIB_FSEEK''@|$(GNULIB_FSEEK)|g' \
 	      -e 's|@''GNULIB_FSEEKO''@|$(GNULIB_FSEEKO)|g' \
 	      -e 's|@''GNULIB_FTELL''@|$(GNULIB_FTELL)|g' \
@@ -384,6 +386,8 @@ stdio.h: stdio_.h
 	      -e 's|@''REPLACE_VSPRINTF''@|$(REPLACE_VSPRINTF)|g' \
 	      -e 's|@''HAVE_VASPRINTF''@|$(HAVE_VASPRINTF)|g' \
 	      -e 's|@''REPLACE_VASPRINTF''@|$(REPLACE_VASPRINTF)|g' \
+	      -e 's|@''REPLACE_FOPEN''@|$(REPLACE_FOPEN)|g' \
+	      -e 's|@''REPLACE_FREOPEN''@|$(REPLACE_FREOPEN)|g' \
 	      -e 's|@''REPLACE_FSEEKO''@|$(REPLACE_FSEEKO)|g' \
 	      -e 's|@''REPLACE_FSEEK''@|$(REPLACE_FSEEK)|g' \
 	      -e 's|@''REPLACE_FTELLO''@|$(REPLACE_FTELLO)|g' \
@@ -393,12 +397,12 @@ stdio.h: stdio_.h
 	      -e 's|@''HAVE_DECL_GETLINE''@|$(HAVE_DECL_GETLINE)|g' \
 	      -e 's|@''REPLACE_GETLINE''@|$(REPLACE_GETLINE)|g' \
 	      -e '/definition of GL_LINK_WARNING/r $(LINK_WARNING_H)' \
-	      < $(srcdir)/stdio_.h; \
+	      < $(srcdir)/stdio.in.h; \
 	} > $@-t
 	mv $@-t $@
 MOSTLYCLEANFILES += stdio.h stdio.h-t
 
-EXTRA_DIST += stdio_.h
+EXTRA_DIST += stdio.in.h
 
 ## end   gnulib module stdio
 
@@ -408,7 +412,7 @@ BUILT_SOURCES += stdlib.h
 
 # We need the following in order to create <stdlib.h> when the system
 # doesn't have one that works with the given compiler.
-stdlib.h: stdlib_.h
+stdlib.h: stdlib.in.h
 	rm -f $@-t $@
 	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */' && \
 	  sed -e 's/@''INCLUDE_NEXT''@/$(INCLUDE_NEXT)/g' \
@@ -426,12 +430,12 @@ stdlib.h: stdlib_.h
 	      -e 's|@''HAVE_REALLOC_POSIX''@|$(HAVE_REALLOC_POSIX)|g' \
 	      -e 's|@''REPLACE_MKSTEMP''@|$(REPLACE_MKSTEMP)|g' \
 	      -e '/definition of GL_LINK_WARNING/r $(LINK_WARNING_H)' \
-	      < $(srcdir)/stdlib_.h; \
+	      < $(srcdir)/stdlib.in.h; \
 	} > $@-t
 	mv $@-t $@
 MOSTLYCLEANFILES += stdlib.h stdlib.h-t
 
-EXTRA_DIST += stdlib_.h
+EXTRA_DIST += stdlib.in.h
 
 ## end   gnulib module stdlib
 
@@ -441,7 +445,7 @@ BUILT_SOURCES += string.h
 
 # We need the following in order to create <string.h> when the system
 # doesn't have one that works with the given compiler.
-string.h: string_.h
+string.h: string.in.h
 	rm -f $@-t $@
 	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */' && \
 	  sed -e 's/@''INCLUDE_NEXT''@/$(INCLUDE_NEXT)/g' \
@@ -473,6 +477,7 @@ string.h: string_.h
 	      -e 's|@''GNULIB_STRSEP''@|$(GNULIB_STRSEP)|g' \
 	      -e 's|@''GNULIB_STRCASESTR''@|$(GNULIB_STRCASESTR)|g' \
 	      -e 's|@''GNULIB_STRTOK_R''@|$(GNULIB_STRTOK_R)|g' \
+	      -e 's|@''GNULIB_STRERROR''@|$(GNULIB_STRERROR)|g' \
 	      -e 's|@''HAVE_DECL_MEMMEM''@|$(HAVE_DECL_MEMMEM)|g' \
 	      -e 's|@''HAVE_MEMPCPY''@|$(HAVE_MEMPCPY)|g' \
 	      -e 's|@''HAVE_DECL_MEMRCHR''@|$(HAVE_DECL_MEMRCHR)|g' \
@@ -489,13 +494,15 @@ string.h: string_.h
 	      -e 's|@''HAVE_STRSEP''@|$(HAVE_STRSEP)|g' \
 	      -e 's|@''HAVE_STRCASESTR''@|$(HAVE_STRCASESTR)|g' \
 	      -e 's|@''HAVE_DECL_STRTOK_R''@|$(HAVE_DECL_STRTOK_R)|g' \
+	      -e 's|@''HAVE_DECL_STRERROR''@|$(HAVE_DECL_STRERROR)|g' \
+	      -e 's|@''REPLACE_STRERROR''@|$(REPLACE_STRERROR)|g' \
 	      -e '/definition of GL_LINK_WARNING/r $(LINK_WARNING_H)' \
-	      < $(srcdir)/string_.h; \
+	      < $(srcdir)/string.in.h; \
 	} > $@-t
 	mv $@-t $@
 MOSTLYCLEANFILES += string.h string.h-t
 
-EXTRA_DIST += string_.h
+EXTRA_DIST += string.in.h
 
 ## end   gnulib module string
 
@@ -514,7 +521,7 @@ BUILT_SOURCES += $(SYS_SOCKET_H)
 
 # We need the following in order to create <sys/socket.h> when the system
 # doesn't have one that works with the given compiler.
-sys/socket.h: sys_socket_.h
+sys/socket.h: sys_socket.in.h
 	@MKDIR_P@ sys
 	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
 	  sed -e 's/@''INCLUDE_NEXT''@/$(INCLUDE_NEXT)/g' \
@@ -522,13 +529,13 @@ sys/socket.h: sys_socket_.h
 	      -e 's|@''HAVE_SYS_SOCKET_H''@|$(HAVE_SYS_SOCKET_H)|g' \
 	      -e 's|@''HAVE_WINSOCK2_H''@|$(HAVE_WINSOCK2_H)|g' \
 	      -e 's|@''HAVE_WS2TCPIP_H''@|$(HAVE_WS2TCPIP_H)|g' \
-	      < $(srcdir)/sys_socket_.h; \
+	      < $(srcdir)/sys_socket.in.h; \
 	} > $@-t
 	mv -f $@-t $@
 MOSTLYCLEANFILES += sys/socket.h sys/socket.h-t
 MOSTLYCLEANDIRS += sys
 
-EXTRA_DIST += sys_socket_.h
+EXTRA_DIST += sys_socket.in.h
 
 ## end   gnulib module sys_socket
 
@@ -538,7 +545,7 @@ BUILT_SOURCES += $(SYS_STAT_H)
 
 # We need the following in order to create <sys/stat.h> when the system
 # has one that is incomplete.
-sys/stat.h: sys_stat_.h
+sys/stat.h: sys_stat.in.h
 	@MKDIR_P@ sys
 	rm -f $@-t $@
 	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
@@ -547,13 +554,13 @@ sys/stat.h: sys_stat_.h
 	      -e 's|@''HAVE_IO_H''@|$(HAVE_IO_H)|g' \
 	      -e 's|@''HAVE_LSTAT''@|$(HAVE_LSTAT)|g' \
 	      -e 's|@''HAVE_DECL_MKDIR''@|$(HAVE_DECL_MKDIR)|g' \
-	      < $(srcdir)/sys_stat_.h; \
+	      < $(srcdir)/sys_stat.in.h; \
 	} > $@-t
 	mv $@-t $@
 MOSTLYCLEANFILES += sys/stat.h sys/stat.h-t
 MOSTLYCLEANDIRS += sys
 
-EXTRA_DIST += sys_stat_.h
+EXTRA_DIST += sys_stat.in.h
 
 ## end   gnulib module sys_stat
 
@@ -563,7 +570,7 @@ BUILT_SOURCES += time.h
 
 # We need the following in order to create <time.h> when the system
 # doesn't have one that works with the given compiler.
-time.h: time_.h
+time.h: time.in.h
 	rm -f $@-t $@
 	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */' && \
 	  sed -e 's/@''INCLUDE_NEXT''@/$(INCLUDE_NEXT)/g' \
@@ -574,12 +581,12 @@ time.h: time_.h
 	      -e 's|@REPLACE_TIMEGM''@|$(REPLACE_TIMEGM)|g' \
 	      -e 's|@SYS_TIME_H_DEFINES_STRUCT_TIMESPEC''@|$(SYS_TIME_H_DEFINES_STRUCT_TIMESPEC)|g' \
 	      -e 's|@TIME_H_DEFINES_STRUCT_TIMESPEC''@|$(TIME_H_DEFINES_STRUCT_TIMESPEC)|g' \
-	      < $(srcdir)/time_.h; \
+	      < $(srcdir)/time.in.h; \
 	} > $@-t
 	mv $@-t $@
 MOSTLYCLEANFILES += time.h time.h-t
 
-EXTRA_DIST += time_.h
+EXTRA_DIST += time.in.h
 
 ## end   gnulib module time
 
@@ -598,7 +605,7 @@ BUILT_SOURCES += unistd.h
 
 # We need the following in order to create an empty placeholder for
 # <unistd.h> when the system doesn't have one.
-unistd.h: unistd_.h
+unistd.h: unistd.in.h
 	rm -f $@-t $@
 	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
 	  sed -e 's|@''HAVE_UNISTD_H''@|$(HAVE_UNISTD_H)|g' \
@@ -624,12 +631,12 @@ unistd.h: unistd_.h
 	      -e 's|@''REPLACE_GETCWD''@|$(REPLACE_GETCWD)|g' \
 	      -e 's|@''REPLACE_LCHOWN''@|$(REPLACE_LCHOWN)|g' \
 	      -e 's|@''REPLACE_LSEEK''@|$(REPLACE_LSEEK)|g' \
-	      < $(srcdir)/unistd_.h; \
+	      < $(srcdir)/unistd.in.h; \
 	} > $@-t
 	mv $@-t $@
 MOSTLYCLEANFILES += unistd.h unistd.h-t
 
-EXTRA_DIST += unistd_.h
+EXTRA_DIST += unistd.in.h
 
 ## end   gnulib module unistd
 
@@ -657,7 +664,7 @@ BUILT_SOURCES += $(WCHAR_H)
 
 # We need the following in order to create <wchar.h> when the system
 # version does not work standalone.
-wchar.h: wchar_.h
+wchar.h: wchar.in.h
 	rm -f $@-t $@
 	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
 	  sed -e 's/@''INCLUDE_NEXT''@/$(INCLUDE_NEXT)/g' \
@@ -667,12 +674,12 @@ wchar.h: wchar_.h
 	      -e 's|@''HAVE_DECL_WCWIDTH''@|$(HAVE_DECL_WCWIDTH)|g' \
 	      -e 's|@''REPLACE_WCWIDTH''@|$(REPLACE_WCWIDTH)|g' \
 	      -e '/definition of GL_LINK_WARNING/r $(LINK_WARNING_H)' \
-	    < $(srcdir)/wchar_.h; \
+	    < $(srcdir)/wchar.in.h; \
 	} > $@-t
 	mv $@-t $@
 MOSTLYCLEANFILES += wchar.h wchar.h-t
 
-EXTRA_DIST += wchar_.h
+EXTRA_DIST += wchar.in.h
 
 ## end   gnulib module wchar
 
diff --git a/lgl/alloca_.h b/lgl/alloca.in.h
index 1c1d9e68ed..1c1d9e68ed 100644
--- a/lgl/alloca_.h
+++ b/lgl/alloca.in.h
diff --git a/lgl/dummy.c b/lgl/dummy.c
index 42a82de177..5834053b05 100644
--- a/lgl/dummy.c
+++ b/lgl/dummy.c
@@ -1,10 +1,10 @@
 /* A dummy file, to prevent empty libraries from breaking builds.
    Copyright (C) 2004, 2007 Free Software Foundation, Inc.
 
-   This program is free software; you can redistribute it and/or modify
+   This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU Lesser General Public License as published by
-   the Free Software Foundation; either version 2.1, or (at your option)
-   any later version.
+   the Free Software Foundation; either version 2.1 of the License, or
+   (at your option) any later version.
 
    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -12,9 +12,7 @@
    GNU Lesser General Public License for more details.
 
    You should have received a copy of the GNU Lesser General Public License
-   along with this program; if not, write to the Free Software
-   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
-   USA.  */
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
 /* Some systems, reportedly OpenBSD and Mac OS X, refuse to create
    libraries without any object files.  You might get an error like:
diff --git a/lgl/float_.h b/lgl/float.in.h
index c31f193d03..7cf07915fa 100644
--- a/lgl/float_.h
+++ b/lgl/float.in.h
@@ -2,10 +2,10 @@
 
    Copyright (C) 2007 Free Software Foundation, Inc.
 
-   This program is free software; you can redistribute it and/or modify
+   This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU Lesser General Public License as published by
-   the Free Software Foundation; either version 2.1, or (at your option)
-   any later version.
+   the Free Software Foundation; either version 2.1 of the License, or
+   (at your option) any later version.
 
    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -13,8 +13,7 @@
    GNU Lesser General Public License for more details.
 
    You should have received a copy of the GNU Lesser General Public License
-   along with this program; if not, write to the Free Software Foundation,
-   Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
 #ifndef _GL_FLOAT_H
 
diff --git a/lgl/gc-gnulib.c b/lgl/gc-gnulib.c
index c3cf0c529e..c199833774 100644
--- a/lgl/gc-gnulib.c
+++ b/lgl/gc-gnulib.c
@@ -581,6 +581,8 @@ gc_hash_open (Gc_hash hash, Gc_hash_mode mode, gc_hash_handle * outhandle)
   Gc_rc rc = GC_OK;
 
   ctx = calloc (sizeof (*ctx), 1);
+  if (!ctx)
+    return GC_MALLOC_ERROR;
 
   ctx->alg = hash;
   ctx->mode = mode;
diff --git a/lgl/gc-libgcrypt.c b/lgl/gc-libgcrypt.c
index f28a20f9f9..683c73ffb4 100644
--- a/lgl/gc-libgcrypt.c
+++ b/lgl/gc-libgcrypt.c
@@ -142,16 +142,6 @@ gc_cipher_open (Gc_cipher alg, Gc_cipher_mode mode,
       gcryalg = GCRY_CIPHER_RFC2268_40;
       break;
 
-#ifdef	ENABLE_CAMELLIA
-    case GC_CAMELLIA128:
-      gcryalg = GCRY_CIPHER_CAMELLIA128;
-      break;
-
-    case GC_CAMELLIA256:
-      gcryalg = GCRY_CIPHER_CAMELLIA256;
-      break;
-#endif
-
     default:
       return GC_INVALID_CIPHER;
     }
diff --git a/lgl/gc.h b/lgl/gc.h
index da29344ebd..9f4bf21515 100644
--- a/lgl/gc.h
+++ b/lgl/gc.h
@@ -79,9 +79,7 @@ enum Gc_cipher
   GC_DES,
   GC_ARCFOUR128,
   GC_ARCFOUR40,
-  GC_ARCTWO40,
-  GC_CAMELLIA128,
-  GC_CAMELLIA256
+  GC_ARCTWO40
 };
 typedef enum Gc_cipher Gc_cipher;
 
diff --git a/lgl/m4/extensions.m4 b/lgl/m4/extensions.m4
index 143a9e5403..bcbb3ceee2 100644
--- a/lgl/m4/extensions.m4
+++ b/lgl/m4/extensions.m4
@@ -1,14 +1,14 @@
-# serial 4  -*- Autoconf -*-
+# serial 5  -*- Autoconf -*-
 # Enable extensions on systems that normally disable them.
 
-# Copyright (C) 2003, 2006 Free Software Foundation, Inc.
+# Copyright (C) 2003, 2006, 2007 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.
 
 # This definition of AC_USE_SYSTEM_EXTENSIONS is stolen from CVS
 # Autoconf.  Perhaps we can remove this once we can assume Autoconf
-# 2.61 or later everywhere, but since CVS Autoconf mutates rapidly
+# 2.62 or later everywhere, but since CVS Autoconf mutates rapidly
 # enough in this area it's likely we'll need to redefine
 # AC_USE_SYSTEM_EXTENSIONS for quite some time.
 
@@ -16,26 +16,48 @@
 # ------------------------
 # Enable extensions on systems that normally disable them,
 # typically due to standards-conformance issues.
+# Remember that #undef in AH_VERBATIM gets replaced with #define by
+# AC_DEFINE.  The goal here is to define all known feature-enabling
+# macros, then, if reports of conflicts are made, disable macros that
+# cause problems on some platforms (such as __EXTENSIONS__).
 AC_DEFUN([AC_USE_SYSTEM_EXTENSIONS],
-[
-  AC_BEFORE([$0], [AC_COMPILE_IFELSE])
-  AC_BEFORE([$0], [AC_RUN_IFELSE])
+[AC_BEFORE([$0], [AC_COMPILE_IFELSE])dnl
+AC_BEFORE([$0], [AC_RUN_IFELSE])dnl
 
-  AC_REQUIRE([AC_GNU_SOURCE])
-  AC_REQUIRE([AC_AIX])
-  AC_REQUIRE([AC_MINIX])
+  AC_CHECK_HEADER([minix/config.h], [MINIX=yes], [MINIX=])
+  if test "$MINIX" = yes; then
+    AC_DEFINE([_POSIX_SOURCE], [1],
+      [Define to 1 if you need to in order for `stat' and other
+       things to work.])
+    AC_DEFINE([_POSIX_1_SOURCE], [2],
+      [Define to 2 if the system does not provide POSIX.1 features
+       except with this defined.])
+    AC_DEFINE([_MINIX], [1],
+      [Define to 1 if on MINIX.])
+  fi
 
   AH_VERBATIM([__EXTENSIONS__],
-[/* Enable extensions on Solaris.  */
-#ifndef __EXTENSIONS__
-# undef __EXTENSIONS__
+[/* Enable extensions on AIX 3, Interix.  */
+#ifndef _ALL_SOURCE
+# undef _ALL_SOURCE
+#endif
+/* Enable GNU extensions on systems that have them.  */
+#ifndef _GNU_SOURCE
+# undef _GNU_SOURCE
 #endif
+/* Enable threading extensions on Solaris.  */
 #ifndef _POSIX_PTHREAD_SEMANTICS
 # undef _POSIX_PTHREAD_SEMANTICS
 #endif
+/* Enable extensions on HP NonStop.  */
 #ifndef _TANDEM_SOURCE
 # undef _TANDEM_SOURCE
-#endif])
+#endif
+/* Enable general extensions on Solaris.  */
+#ifndef __EXTENSIONS__
+# undef __EXTENSIONS__
+#endif
+])
   AC_CACHE_CHECK([whether it is safe to define __EXTENSIONS__],
     [ac_cv_safe_to_define___extensions__],
     [AC_COMPILE_IFELSE(
@@ -46,9 +68,11 @@ AC_DEFUN([AC_USE_SYSTEM_EXTENSIONS],
        [ac_cv_safe_to_define___extensions__=no])])
   test $ac_cv_safe_to_define___extensions__ = yes &&
     AC_DEFINE([__EXTENSIONS__])
+  AC_DEFINE([_ALL_SOURCE])
+  AC_DEFINE([_GNU_SOURCE])
   AC_DEFINE([_POSIX_PTHREAD_SEMANTICS])
   AC_DEFINE([_TANDEM_SOURCE])
-])
+])# AC_USE_SYSTEM_EXTENSIONS
 
 # gl_USE_SYSTEM_EXTENSIONS
 # ------------------------
diff --git a/lgl/m4/gnulib-comp.m4 b/lgl/m4/gnulib-comp.m4
index 10e3e26fe8..55c46f19cc 100644
--- a/lgl/m4/gnulib-comp.m4
+++ b/lgl/m4/gnulib-comp.m4
@@ -124,25 +124,38 @@ AC_DEFUN([lgl_INIT],
 
 # Like AC_LIBOBJ, except that the module name goes
 # into lgl_LIBOBJS instead of into LIBOBJS.
-AC_DEFUN([lgl_LIBOBJ],
-  [lgl_LIBOBJS="$lgl_LIBOBJS $1.$ac_objext"])
+AC_DEFUN([lgl_LIBOBJ], [
+  AS_LITERAL_IF([$1], [lgl_LIBSOURCES([$1.c])])dnl
+  lgl_LIBOBJS="$lgl_LIBOBJS $1.$ac_objext"
+])
 
 # Like AC_REPLACE_FUNCS, except that the module name goes
 # into lgl_LIBOBJS instead of into LIBOBJS.
-AC_DEFUN([lgl_REPLACE_FUNCS],
-  [AC_CHECK_FUNCS([$1], , [lgl_LIBOBJ($ac_func)])])
+AC_DEFUN([lgl_REPLACE_FUNCS], [
+  m4_foreach_w([gl_NAME], [$1], [AC_LIBSOURCES(gl_NAME[.c])])dnl
+  AC_CHECK_FUNCS([$1], , [lgl_LIBOBJ($ac_func)])
+])
 
-# Like AC_LIBSOURCES, except that it does nothing.
-# We rely on EXTRA_lib..._SOURCES instead.
-AC_DEFUN([lgl_LIBSOURCES],
-  [])
+# Like AC_LIBSOURCES, except the directory where the source file is
+# expected is derived from the gnulib-tool parametrization,
+# and alloca is special cased (for the alloca-opt module).
+# We could also entirely rely on EXTRA_lib..._SOURCES.
+AC_DEFUN([lgl_LIBSOURCES], [
+  m4_foreach([_gl_NAME], [$1], [
+    m4_if(_gl_NAME, [alloca.c], [], [
+      m4_syscmd([test -r lgl/]_gl_NAME[ || test ! -d lgl])dnl
+      m4_if(m4_sysval, [0], [],
+        [AC_FATAL([missing lgl/]_gl_NAME)])
+    ])
+  ])
+])
 
 # This macro records the list of files which have been installed by
 # gnulib-tool and may be removed by future gnulib-tool invocations.
 AC_DEFUN([lgl_FILE_LIST], [
   build-aux/config.rpath
   build-aux/link-warning.h
-  lib/alloca_.h
+  lib/alloca.in.h
   lib/arcfour.c
   lib/arcfour.h
   lib/arctwo.c
@@ -153,7 +166,7 @@ AC_DEFUN([lgl_FILE_LIST], [
   lib/des.h
   lib/dummy.c
   lib/float+.h
-  lib/float_.h
+  lib/float.in.h
   lib/gc-gnulib.c
   lib/gc-libgcrypt.c
   lib/gc-pbkdf2-sha1.c
@@ -188,22 +201,22 @@ AC_DEFUN([lgl_FILE_LIST], [
   lib/sha1.h
   lib/size_max.h
   lib/snprintf.c
-  lib/stdbool_.h
-  lib/stdint_.h
-  lib/stdio_.h
-  lib/stdlib_.h
-  lib/string_.h
+  lib/stdbool.in.h
+  lib/stdint.in.h
+  lib/stdio.in.h
+  lib/stdlib.in.h
+  lib/string.in.h
   lib/strverscmp.c
   lib/strverscmp.h
-  lib/sys_socket_.h
-  lib/sys_stat_.h
-  lib/time_.h
+  lib/sys_socket.in.h
+  lib/sys_stat.in.h
+  lib/time.in.h
   lib/time_r.c
-  lib/unistd_.h
+  lib/unistd.in.h
   lib/vasnprintf.c
   lib/vasnprintf.h
   lib/vasprintf.c
-  lib/wchar_.h
+  lib/wchar.in.h
   lib/xsize.h
   m4/absolute-header.m4
   m4/alloca.m4
diff --git a/lgl/m4/lock.m4 b/lgl/m4/lock.m4
index 0224f2ff87..4cc585ea2e 100644
--- a/lgl/m4/lock.m4
+++ b/lgl/m4/lock.m4
@@ -1,5 +1,5 @@
-# lock.m4 serial 6 (gettext-0.16)
-dnl Copyright (C) 2005-2006 Free Software Foundation, Inc.
+# lock.m4 serial 7 (gettext-0.16.2)
+dnl Copyright (C) 2005-2007 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.
@@ -35,7 +35,12 @@ AC_DEFUN([gl_LOCK_EARLY_BODY],
   AC_BEFORE([$0], [gl_ARGP])dnl
 
   AC_REQUIRE([AC_CANONICAL_HOST])
-  AC_REQUIRE([AC_GNU_SOURCE]) dnl needed for pthread_rwlock_t on glibc systems
+  dnl _GNU_SOURCE is needed for pthread_rwlock_t on glibc systems.
+  dnl AC_USE_SYSTEM_EXTENSIONS was introduced in autoconf 2.60 and obsoletes
+  dnl AC_GNU_SOURCE.
+  m4_ifdef([AC_USE_SYSTEM_EXTENSIONS],
+    [AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])],
+    [AC_REQUIRE([AC_GNU_SOURCE])])
   dnl Check for multithreading.
   AC_ARG_ENABLE(threads,
 AC_HELP_STRING([--enable-threads={posix|solaris|pth|win32}], [specify multithreading API])
diff --git a/lgl/m4/longlong.m4 b/lgl/m4/longlong.m4
index 1f9e862ef1..5799c3965a 100644
--- a/lgl/m4/longlong.m4
+++ b/lgl/m4/longlong.m4
@@ -1,5 +1,5 @@
-# longlong.m4 serial 10
-dnl Copyright (C) 1999-2006 Free Software Foundation, Inc.
+# longlong.m4 serial 11
+dnl Copyright (C) 1999-2007 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.
@@ -7,8 +7,8 @@ dnl with or without modifications, as long as this notice is preserved.
 dnl From Paul Eggert.
 
 # Define HAVE_LONG_LONG_INT if 'long long int' works.
-# This fixes a bug in Autoconf 2.60, but can be removed once we
-# assume 2.61 everywhere.
+# This fixes a bug in Autoconf 2.61, but can be removed once we
+# assume 2.62 everywhere.
 
 # Note: If the type 'long long int' exists but is only 32 bits large
 # (as on some very old compilers), HAVE_LONG_LONG_INT will not be
@@ -19,7 +19,10 @@ AC_DEFUN([AC_TYPE_LONG_LONG_INT],
   AC_CACHE_CHECK([for long long int], [ac_cv_type_long_long_int],
     [AC_LINK_IFELSE(
        [AC_LANG_PROGRAM(
-	  [[long long int ll = 9223372036854775807ll;
+	  [[#if ! (-9223372036854775807LL < 0 && 0 < 9223372036854775807ll)
+	      error in preprocessor;
+	    #endif
+	    long long int ll = 9223372036854775807ll;
 	    long long int nll = -9223372036854775807LL;
 	    typedef int a[((-9223372036854775807LL < 0
 			    && 0 < 9223372036854775807ll)
diff --git a/lgl/m4/memmem.m4 b/lgl/m4/memmem.m4
index e6d40068e4..e6a3da193c 100644
--- a/lgl/m4/memmem.m4
+++ b/lgl/m4/memmem.m4
@@ -1,4 +1,4 @@
-# memmem.m4 serial 4
+# memmem.m4 serial 5
 dnl Copyright (C) 2002, 2003, 2004, 2007 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -7,7 +7,7 @@ dnl with or without modifications, as long as this notice is preserved.
 AC_DEFUN([gl_FUNC_MEMMEM],
 [
   dnl Persuade glibc <string.h> to declare memmem().
-  AC_REQUIRE([AC_GNU_SOURCE])
+  AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
 
   AC_REQUIRE([gl_HEADER_STRING_H_DEFAULTS])
   AC_REPLACE_FUNCS(memmem)
diff --git a/lgl/m4/socklen.m4 b/lgl/m4/socklen.m4
index d39a314e17..b755757be4 100644
--- a/lgl/m4/socklen.m4
+++ b/lgl/m4/socklen.m4
@@ -1,4 +1,4 @@
-# socklen.m4 serial 5
+# socklen.m4 serial 6
 dnl Copyright (C) 2005, 2006, 2007 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -12,7 +12,7 @@ dnl types for the argument to getsockopt, getpeername, etc.  So we
 dnl have to test to find something that will work.
 
 dnl On mingw32, socklen_t is in ws2tcpip.h ('int'), so we try to find
-dnl it there first.  That file is included by gnulib's sys_socket_.h, which
+dnl it there first.  That file is included by gnulib's sys_socket.in.h, which
 dnl all users of this module should include.  Cygwin must not include
 dnl ws2tcpip.h.
 AC_DEFUN([gl_TYPE_SOCKLEN_T],
diff --git a/lgl/m4/stdint.m4 b/lgl/m4/stdint.m4
index 03bb093202..bb6c34fe1e 100644
--- a/lgl/m4/stdint.m4
+++ b/lgl/m4/stdint.m4
@@ -1,4 +1,4 @@
-# stdint.m4 serial 28
+# stdint.m4 serial 29
 dnl Copyright (C) 2001-2007 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -370,7 +370,7 @@ AC_DEFUN([gl_STDINT_INCLUDES],
 
 dnl gl_STDINT_TYPE_PROPERTIES
 dnl Compute HAVE_SIGNED_t, BITSIZEOF_t and t_SUFFIX, for all the types t
-dnl of interest to stdint_.h.
+dnl of interest to stdint.in.h.
 AC_DEFUN([gl_STDINT_TYPE_PROPERTIES],
 [
   gl_STDINT_BITSIZEOF([ptrdiff_t sig_atomic_t size_t wchar_t wint_t],
diff --git a/lgl/m4/stdio_h.m4 b/lgl/m4/stdio_h.m4
index b9a69984f6..45e54e2a62 100644
--- a/lgl/m4/stdio_h.m4
+++ b/lgl/m4/stdio_h.m4
@@ -1,4 +1,4 @@
-# stdio_h.m4 serial 7
+# stdio_h.m4 serial 8
 dnl Copyright (C) 2007 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -28,6 +28,8 @@ AC_DEFUN([gl_STDIO_H_DEFAULTS],
   GNULIB_VSNPRINTF=0;      AC_SUBST([GNULIB_VSNPRINTF])
   GNULIB_VSPRINTF_POSIX=0; AC_SUBST([GNULIB_VSPRINTF_POSIX])
   GNULIB_VASPRINTF=0;      AC_SUBST([GNULIB_VASPRINTF])
+  GNULIB_FOPEN=0;          AC_SUBST([GNULIB_FOPEN])
+  GNULIB_FREOPEN=0;        AC_SUBST([GNULIB_FREOPEN])
   GNULIB_FSEEK=0;          AC_SUBST([GNULIB_FSEEK])
   GNULIB_FSEEKO=0;         AC_SUBST([GNULIB_FSEEKO])
   GNULIB_FTELL=0;          AC_SUBST([GNULIB_FTELL])
@@ -48,6 +50,8 @@ AC_DEFUN([gl_STDIO_H_DEFAULTS],
   REPLACE_VSPRINTF=0;      AC_SUBST([REPLACE_VSPRINTF])
   HAVE_VASPRINTF=1;        AC_SUBST([HAVE_VASPRINTF])
   REPLACE_VASPRINTF=0;     AC_SUBST([REPLACE_VASPRINTF])
+  REPLACE_FOPEN=0;         AC_SUBST([REPLACE_FOPEN])
+  REPLACE_FREOPEN=0;       AC_SUBST([REPLACE_FREOPEN])
   HAVE_FSEEKO=1;           AC_SUBST([HAVE_FSEEKO])
   REPLACE_FSEEKO=0;        AC_SUBST([REPLACE_FSEEKO])
   REPLACE_FSEEK=0;         AC_SUBST([REPLACE_FSEEK])
diff --git a/lgl/m4/string_h.m4 b/lgl/m4/string_h.m4
index ec51e9a018..d811e26b88 100644
--- a/lgl/m4/string_h.m4
+++ b/lgl/m4/string_h.m4
@@ -57,6 +57,7 @@ AC_DEFUN([gl_HEADER_STRING_H_DEFAULTS],
   GNULIB_MBSSPN=0;      AC_SUBST([GNULIB_MBSSPN])
   GNULIB_MBSSEP=0;      AC_SUBST([GNULIB_MBSSEP])
   GNULIB_MBSTOK_R=0;    AC_SUBST([GNULIB_MBSTOK_R])
+  GNULIB_STRERROR=0;    AC_SUBST([GNULIB_STRERROR])
   dnl Assume proper GNU behavior unless another module says otherwise.
   HAVE_DECL_MEMMEM=1;		AC_SUBST([HAVE_DECL_MEMMEM])
   HAVE_MEMPCPY=1;		AC_SUBST([HAVE_MEMPCPY])
@@ -74,4 +75,6 @@ AC_DEFUN([gl_HEADER_STRING_H_DEFAULTS],
   HAVE_STRSEP=1;		AC_SUBST([HAVE_STRSEP])
   HAVE_STRCASESTR=1;		AC_SUBST([HAVE_STRCASESTR])
   HAVE_DECL_STRTOK_R=1;		AC_SUBST([HAVE_DECL_STRTOK_R])
+  HAVE_DECL_STRERROR=1;		AC_SUBST([HAVE_DECL_STRERROR])
+  REPLACE_STRERROR=0;		AC_SUBST([REPLACE_STRERROR])
 ])
diff --git a/lgl/m4/strverscmp.m4 b/lgl/m4/strverscmp.m4
index ab20c1809d..5f01ba9e5b 100644
--- a/lgl/m4/strverscmp.m4
+++ b/lgl/m4/strverscmp.m4
@@ -1,5 +1,5 @@
-# strverscmp.m4 serial 4
-dnl Copyright (C) 2002, 2005, 2006 Free Software Foundation, Inc.
+# strverscmp.m4 serial 5
+dnl Copyright (C) 2002, 2005, 2006, 2007 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.
@@ -7,7 +7,7 @@ dnl with or without modifications, as long as this notice is preserved.
 AC_DEFUN([gl_FUNC_STRVERSCMP],
 [
   dnl Persuade glibc <string.h> to declare strverscmp().
-  AC_REQUIRE([AC_GNU_SOURCE])
+  AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
 
   AC_REPLACE_FUNCS(strverscmp)
   if test $ac_cv_func_strverscmp = no; then
diff --git a/lgl/m4/ulonglong.m4 b/lgl/m4/ulonglong.m4
index 9fae98e3a6..e9807895a7 100644
--- a/lgl/m4/ulonglong.m4
+++ b/lgl/m4/ulonglong.m4
@@ -1,5 +1,5 @@
-# ulonglong.m4 serial 6
-dnl Copyright (C) 1999-2006 Free Software Foundation, Inc.
+# ulonglong.m4 serial 7
+dnl Copyright (C) 1999-2007 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.
@@ -7,8 +7,8 @@ dnl with or without modifications, as long as this notice is preserved.
 dnl From Paul Eggert.
 
 # Define HAVE_UNSIGNED_LONG_LONG_INT if 'unsigned long long int' works.
-# This fixes a bug in Autoconf 2.60, but can be removed once we
-# assume 2.61 everywhere.
+# This fixes a bug in Autoconf 2.61, but can be removed once we
+# assume 2.62 everywhere.
 
 # Note: If the type 'unsigned long long int' exists but is only 32 bits
 # large (as on some very old compilers), AC_TYPE_UNSIGNED_LONG_LONG_INT
@@ -21,7 +21,10 @@ AC_DEFUN([AC_TYPE_UNSIGNED_LONG_LONG_INT],
     [ac_cv_type_unsigned_long_long_int],
     [AC_LINK_IFELSE(
        [AC_LANG_PROGRAM(
-	  [[unsigned long long int ull = 18446744073709551615ULL;
+	  [[#if ! (18446744073709551615ULL <= -1u)
+	      error in preprocessor;
+	    #endif
+	    unsigned long long int ull = 18446744073709551615ULL;
 	    typedef int a[(18446744073709551615ULL <= (unsigned long long int) -1
 			   ? 1 : -1)];
 	   int i = 63;]],
diff --git a/lgl/m4/vasprintf.m4 b/lgl/m4/vasprintf.m4
index 4f0c79a71a..074b03cf72 100644
--- a/lgl/m4/vasprintf.m4
+++ b/lgl/m4/vasprintf.m4
@@ -1,4 +1,4 @@
-# vasprintf.m4 serial 5
+# vasprintf.m4 serial 6
 dnl Copyright (C) 2002-2003, 2006-2007 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -31,7 +31,7 @@ AC_DEFUN([gl_REPLACE_VASPRINTF],
 AC_DEFUN([gl_PREREQ_VASPRINTF_H],
 [
   dnl Persuade glibc <stdio.h> to declare asprintf() and vasprintf().
-  AC_REQUIRE([AC_GNU_SOURCE])
+  AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
 ])
 
 # Prerequisites of lib/vasprintf.c.
diff --git a/lgl/printf-parse.c b/lgl/printf-parse.c
index 1c3e6c0a11..0b75c2860d 100644
--- a/lgl/printf-parse.c
+++ b/lgl/printf-parse.c
@@ -49,7 +49,7 @@
 #include <stddef.h>
 
 /* Get intmax_t.  */
-#ifdef IN_LIBINTL
+#if defined IN_LIBINTL || defined IN_LIBASPRINTF
 # if HAVE_STDINT_H_WITH_UINTMAX
 #  include <stdint.h>
 # endif
diff --git a/lgl/realloc.c b/lgl/realloc.c
index bcb6969ec5..4f6cddf537 100644
--- a/lgl/realloc.c
+++ b/lgl/realloc.c
@@ -2,10 +2,10 @@
 
    Copyright (C) 1997, 2003, 2004, 2006, 2007 Free Software Foundation, Inc.
 
-   This program is free software; you can redistribute it and/or modify
+   This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU Lesser General Public License as published by
-   the Free Software Foundation; either version 2.1, or (at your option)
-   any later version.
+   the Free Software Foundation; either version 2.1 of the License, or
+   (at your option) any later version.
 
    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -13,8 +13,7 @@
    GNU Lesser General Public License for more details.
 
    You should have received a copy of the GNU Lesser General Public License
-   along with this program; if not, write to the Free Software Foundation,
-   Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
 /* written by Jim Meyering and Bruno Haible */
 
diff --git a/lgl/stdbool_.h b/lgl/stdbool.in.h
index 4762a5c301..4762a5c301 100644
--- a/lgl/stdbool_.h
+++ b/lgl/stdbool.in.h
diff --git a/lgl/stdint_.h b/lgl/stdint.in.h
index 163378ce7d..163378ce7d 100644
--- a/lgl/stdint_.h
+++ b/lgl/stdint.in.h
diff --git a/lgl/stdio_.h b/lgl/stdio.in.h
index 42bac02bdb..b17642438d 100644
--- a/lgl/stdio_.h
+++ b/lgl/stdio.in.h
@@ -212,6 +212,32 @@ extern int vsprintf (char *str, const char *format, va_list args)
 # endif
 #endif
 
+#if @GNULIB_FOPEN@
+# if @REPLACE_FOPEN@
+#  define fopen rpl_fopen
+extern FILE * fopen (const char *filename, const char *mode);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef fopen
+# define fopen(f,m) \
+   (GL_LINK_WARNING ("fopen on Win32 platforms is not POSIX compatible - " \
+                     "use gnulib module fopen for portability"), \
+    fopen (f, m))
+#endif
+
+#if @GNULIB_FREOPEN@
+# if @REPLACE_FREOPEN@
+#  define freopen rpl_freopen
+extern FILE * freopen (const char *filename, const char *mode, FILE *stream);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef freopen
+# define freopen(f,m,s) \
+   (GL_LINK_WARNING ("freopen on Win32 platforms is not POSIX compatible - " \
+                     "use gnulib module freopen for portability"), \
+    freopen (f, m, s))
+#endif
+
 #if @GNULIB_FSEEKO@
 # if @REPLACE_FSEEKO@
 /* Provide fseek, fseeko functions that are aware of a preceding
@@ -308,12 +334,14 @@ extern long rpl_ftell (FILE *fp);
 
 #if @GNULIB_GETDELIM@
 # if !@HAVE_DECL_GETDELIM@
-  /* Read up to (and including) a DELIMITER from FP into *LINEPTR (and
-     NUL-terminate it).  *LINEPTR is a pointer returned from malloc (or
-     NULL), pointing to *N characters of space.  It is realloc'ed as
-     necessary.  Returns the number of characters read (not including
-     the null terminator), or -1 on error or EOF.  */
-  extern ssize_t getdelim (char **, size_t *, int delim, FILE *);
+/* Read input, up to (and including) the next occurrence of DELIMITER, from
+   STREAM, store it in *LINEPTR (and NUL-terminate it).
+   *LINEPTR is a pointer returned from malloc (or NULL), pointing to *LINESIZE
+   bytes of space.  It is realloc'd as necessary.
+   Return the number of bytes read and stored at *LINEPTR (not including the
+   NUL terminator), or -1 on error or EOF.  */
+extern ssize_t getdelim (char **lineptr, size_t *linesize, int delimiter,
+			 FILE *stream);
 # endif
 #elif defined GNULIB_POSIXCHECK
 # undef getdelim
@@ -329,12 +357,13 @@ extern long rpl_ftell (FILE *fp);
 #  define getline rpl_getline
 # endif
 # if !@HAVE_DECL_GETLINE@ || @REPLACE_GETLINE@
-  /* Read up to (and including) a newline from FP into *LINEPTR (and
-     NUL-terminate it).  *LINEPTR is a pointer returned from malloc (or
-     NULL), pointing to *N characters of space.  It is realloc'ed as
-     necessary.  Returns the number of characters read (not including
-     the null terminator), or -1 on error or EOF.  */
-  extern ssize_t getline (char **, size_t *, FILE *);
+/* Read a line, up to (and including) the next newline, from STREAM, store it
+   in *LINEPTR (and NUL-terminate it).
+   *LINEPTR is a pointer returned from malloc (or NULL), pointing to *LINESIZE
+   bytes of space.  It is realloc'd as necessary.
+   Return the number of bytes read and stored at *LINEPTR (not including the
+   NUL terminator), or -1 on error or EOF.  */
+extern ssize_t getline (char **lineptr, size_t *linesize, FILE *stream);
 # endif
 #elif defined GNULIB_POSIXCHECK
 # undef getline
diff --git a/lgl/stdlib_.h b/lgl/stdlib.in.h
index 9ca200bcef..7d46562414 100644
--- a/lgl/stdlib_.h
+++ b/lgl/stdlib.in.h
@@ -2,10 +2,10 @@
 
    Copyright (C) 1995, 2001-2002, 2006-2007 Free Software Foundation, Inc.
 
-   This program is free software; you can redistribute it and/or modify
+   This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU Lesser General Public License as published by
-   the Free Software Foundation; either version 2.1, or (at your option)
-   any later version.
+   the Free Software Foundation; either version 2.1 of the License, or
+   (at your option) any later version.
 
    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -13,8 +13,7 @@
    GNU Lesser General Public License for more details.
 
    You should have received a copy of the GNU Lesser General Public License
-   along with this program; if not, write to the Free Software Foundation,
-   Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
 #if defined __need_malloc_and_calloc
 /* Special invocation convention inside glibc header files.  */
diff --git a/lgl/string_.h b/lgl/string.in.h
index b7edebed56..f458f4400d 100644
--- a/lgl/string_.h
+++ b/lgl/string.in.h
@@ -539,6 +539,21 @@ extern char * mbssep (char **stringp, const char *delim);
 extern char * mbstok_r (char *string, const char *delim, char **save_ptr);
 #endif
 
+/* Map any int, typically from errno, into an error message.  */
+#if @GNULIB_STRERROR@
+# if @REPLACE_STRERROR@
+#  undef strerror
+#  define strerror rpl_strerror
+extern char *strerror (int);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef strerror
+# define strerror(e) \
+    (GL_LINK_WARNING ("strerror is unportable - " \
+                      "use gnulib module strerror to guarantee non-NULL result"), \
+     strerror (e))
+#endif
+
 
 #ifdef __cplusplus
 }
diff --git a/lgl/sys_socket_.h b/lgl/sys_socket.in.h
index 35cde40b23..35cde40b23 100644
--- a/lgl/sys_socket_.h
+++ b/lgl/sys_socket.in.h
diff --git a/lgl/sys_stat_.h b/lgl/sys_stat.in.h
index ff2159f3e0..ff2159f3e0 100644
--- a/lgl/sys_stat_.h
+++ b/lgl/sys_stat.in.h
diff --git a/lgl/time_.h b/lgl/time.in.h
index 3f5ad0061f..3f5ad0061f 100644
--- a/lgl/time_.h
+++ b/lgl/time.in.h
diff --git a/lgl/unistd_.h b/lgl/unistd.in.h
index 5405baf881..5405baf881 100644
--- a/lgl/unistd_.h
+++ b/lgl/unistd.in.h
diff --git a/lgl/vasnprintf.c b/lgl/vasnprintf.c
index 75c6e9ee9f..ee7c319023 100644
--- a/lgl/vasnprintf.c
+++ b/lgl/vasnprintf.c
@@ -3385,9 +3385,21 @@ VASNPRINTF (DCHAR_T *resultbuf, size_t *lengthp,
 #endif
 		  *fbp = dp->conversion;
 #if USE_SNPRINTF
+# if !(__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 3))
 		fbp[1] = '%';
 		fbp[2] = 'n';
 		fbp[3] = '\0';
+# else
+		/* On glibc2 systems from glibc >= 2.3 - probably also older
+		   ones - we know that snprintf's returns value conforms to
+		   ISO C 99: the gl_SNPRINTF_DIRECTIVE_N test passes.
+		   Therefore we can avoid using %n in this situation.
+		   On glibc2 systems from 2004-10-18 or newer, the use of %n
+		   in format strings in writable memory may crash the program
+		   (if compiled with _FORTIFY_SOURCE=2), so we should avoid it
+		   in this situation.  */
+		fbp[1] = '\0';
+# endif
 #else
 		fbp[1] = '\0';
 #endif
@@ -3430,7 +3442,7 @@ VASNPRINTF (DCHAR_T *resultbuf, size_t *lengthp,
 		    /* SNPRINTF can fail if its second argument is
 		       > INT_MAX.  */
 		    if (maxlen > INT_MAX / TCHARS_PER_DCHAR)
-		      goto overflow;
+		      maxlen = INT_MAX / TCHARS_PER_DCHAR;
 		    maxlen = maxlen * TCHARS_PER_DCHAR;
 # define SNPRINTF_BUF(arg) \
 		    switch (prefix_count)				    \
@@ -3651,17 +3663,26 @@ VASNPRINTF (DCHAR_T *resultbuf, size_t *lengthp,
 		    /* Handle overflow of the allocated buffer.  */
 		    if (count >= maxlen)
 		      {
-			/* Need at least count * sizeof (TCHAR_T) bytes.  But
-			   allocate proportionally, to avoid looping eternally
-			   if snprintf() reports a too small count.  */
-			size_t n =
-			  xmax (xsum (length,
-				      (count + TCHARS_PER_DCHAR - 1)
-				      / TCHARS_PER_DCHAR),
-				xtimes (allocated, 2));
-
-			ENSURE_ALLOCATION (n);
-			continue;
+			/* If maxlen already has attained its allowed maximum,
+			   allocating more memory will not increase maxlen.
+			   Instead of looping, bail out.  */
+			if (maxlen == INT_MAX / TCHARS_PER_DCHAR)
+			  goto overflow;
+			else
+			  {
+			    /* Need at least count * sizeof (TCHAR_T) bytes.
+			       But allocate proportionally, to avoid looping
+			       eternally if snprintf() reports a too small
+			       count.  */
+			    size_t n =
+			      xmax (xsum (length,
+					  (count + TCHARS_PER_DCHAR - 1)
+					  / TCHARS_PER_DCHAR),
+				    xtimes (allocated, 2));
+
+			    ENSURE_ALLOCATION (n);
+			    continue;
+			  }
 		      }
 #endif
 
diff --git a/lgl/wchar_.h b/lgl/wchar.in.h
index 0aba1cac10..0aba1cac10 100644
--- a/lgl/wchar_.h
+++ b/lgl/wchar.in.h