Add.

6 files changed, 754 insertions, 0 deletions

diff --git a/gl/m4/absolute-header.m4 b/gl/m4/absolute-header.m4
new file mode 100644
index 0000000..c649df0
--- /dev/null
+++ b/gl/m4/absolute-header.m4
@@ -0,0 +1,44 @@
+# absolute-header.m4 serial 6
+dnl Copyright (C) 2006 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.
+
+dnl From Derek Price.
+
+# gl_ABSOLUTE_HEADER(HEADER1 HEADER2 ...)
+# ---------------------------------------
+# Find the absolute name of a header file, assuming the header exists.
+# If the header were sys/inttypes.h, this macro would define
+# ABSOLUTE_SYS_INTTYPES_H to the `""' quoted absolute name of sys/inttypes.h
+# in config.h
+# (e.g. `#define ABSOLUTE_SYS_INTTYPES_H "///usr/include/sys/inttypes.h"').
+# The three "///" are to pacify Sun C 5.8, which otherwise would say
+# "warning: #include of /usr/include/... may be non-portable".
+# Use `""', not `<>', so that the /// cannot be confused with a C99 comment.
+AC_DEFUN([gl_ABSOLUTE_HEADER],
+[AC_LANG_PREPROC_REQUIRE()dnl
+AC_FOREACH([gl_HEADER_NAME], [$1],
+  [AS_VAR_PUSHDEF([gl_absolute_header],
+                  [gl_cv_absolute_]m4_quote(m4_defn([gl_HEADER_NAME])))dnl
+  AC_CACHE_CHECK([absolute name of <]m4_quote(m4_defn([gl_HEADER_NAME]))[>],
+    m4_quote(m4_defn([gl_absolute_header])),
+    [AS_VAR_PUSHDEF([ac_header_exists],
+                    [ac_cv_header_]m4_quote(m4_defn([gl_HEADER_NAME])))dnl
+    AC_CHECK_HEADERS_ONCE(m4_quote(m4_defn([gl_HEADER_NAME])))dnl
+    if test AS_VAR_GET(ac_header_exists) = yes; then
+      AC_LANG_CONFTEST([AC_LANG_SOURCE([[#include <]]m4_dquote(m4_defn([gl_HEADER_NAME]))[[>]])])
+dnl eval is necessary to expand ac_cpp.
+dnl Ultrix and Pyramid sh refuse to redirect output of eval, so use subshell.
+      AS_VAR_SET(gl_absolute_header,
+[`(eval "$ac_cpp conftest.$ac_ext") 2>&AS_MESSAGE_LOG_FD |
+sed -n '\#/]m4_quote(m4_defn([gl_HEADER_NAME]))[#{s#.*"\(.*/]m4_quote(m4_defn([gl_HEADER_NAME]))[\)".*#\1#;s#^/[^/]#//&#;p;q;}'`])
+    fi
+    AS_VAR_POPDEF([ac_header_exists])dnl
+    ])dnl
+  AC_DEFINE_UNQUOTED(AS_TR_CPP([ABSOLUTE_]m4_quote(m4_defn([gl_HEADER_NAME]))),
+                     ["AS_VAR_GET(gl_absolute_header)"],
+                     [Define this to an absolute name of <]m4_quote(m4_defn([gl_HEADER_NAME]))[>.])
+  AS_VAR_POPDEF([gl_absolute_header])dnl
+])dnl
+])# gl_ABSOLUTE_HEADER
diff --git a/gl/m4/extensions.m4 b/gl/m4/extensions.m4
new file mode 100644
index 0000000..143a9e5
--- /dev/null
+++ b/gl/m4/extensions.m4
@@ -0,0 +1,58 @@
+# serial 4  -*- Autoconf -*-
+# Enable extensions on systems that normally disable them.
+
+# Copyright (C) 2003, 2006 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
+# 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.
+AC_DEFUN([AC_USE_SYSTEM_EXTENSIONS],
+[
+  AC_BEFORE([$0], [AC_COMPILE_IFELSE])
+  AC_BEFORE([$0], [AC_RUN_IFELSE])
+
+  AC_REQUIRE([AC_GNU_SOURCE])
+  AC_REQUIRE([AC_AIX])
+  AC_REQUIRE([AC_MINIX])
+
+  AH_VERBATIM([__EXTENSIONS__],
+[/* Enable extensions on Solaris.  */
+#ifndef __EXTENSIONS__
+# undef __EXTENSIONS__
+#endif
+#ifndef _POSIX_PTHREAD_SEMANTICS
+# undef _POSIX_PTHREAD_SEMANTICS
+#endif
+#ifndef _TANDEM_SOURCE
+# undef _TANDEM_SOURCE
+#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([_POSIX_PTHREAD_SEMANTICS])
+  AC_DEFINE([_TANDEM_SOURCE])
+])
+
+# 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/gnulib-common.m4 b/gl/m4/gnulib-common.m4
new file mode 100644
index 0000000..5398010
--- /dev/null
+++ b/gl/m4/gnulib-common.m4
@@ -0,0 +1,22 @@
+# gnulib-common.m4 serial 2
+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,
+dnl with or without modifications, as long as this notice is preserved.
+
+# gl_MODULE_INDICATOR([modulename])
+# defines a C macro indicating the presence of the given module.
+AC_DEFUN([gl_MODULE_INDICATOR],
+[
+  AC_DEFINE([GNULIB_]translit([$1],[abcdefghijklmnopqrstuvwxyz./-],[ABCDEFGHIJKLMNOPQRSTUVWXYZ___]), [1],
+    [Define to 1 when using the gnulib module ]$1[.])
+])
+
+# AC_PROG_MKDIR_P
+# is a backport of autoconf-2.60's AC_PROG_MKDIR_P.
+# Remove this macro when we can assume autoconf >= 2.60.
+m4_ifdef([AC_PROG_MKDIR_P], [], [
+  AC_DEFUN([AC_PROG_MKDIR_P],
+    [AC_REQUIRE([AM_PROG_MKDIR_P])dnl defined by automake
+     MKDIR_P='$(mkdir_p)'
+     AC_SUBST([MKDIR_P])])])
diff --git a/gl/m4/string_h.m4 b/gl/m4/string_h.m4
new file mode 100644
index 0000000..9f5ba87
--- /dev/null
+++ b/gl/m4/string_h.m4
@@ -0,0 +1,81 @@
+# Configure a GNU-like replacement for <string.h>.
+
+# Copyright (C) 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.
+
+# Written by Paul Eggert.
+
+AC_DEFUN([gl_HEADER_STRING_H],
+[
+  dnl Use AC_REQUIRE here, so that the default behavior below is expanded
+  dnl once only, before all statements that occur in other macros.
+  AC_REQUIRE([gl_HEADER_STRING_H_BODY])
+])
+
+AC_DEFUN([gl_HEADER_STRING_H_BODY],
+[
+  AC_REQUIRE([AC_C_RESTRICT])
+  AC_REQUIRE([gl_HEADER_STRING_H_DEFAULTS])
+  AC_REQUIRE([gl_STRING_MODULE_INDICATOR_DEFAULTS])
+  gl_ABSOLUTE_HEADER([string.h])
+  ABSOLUTE_STRING_H=\"$gl_cv_absolute_string_h\"
+  AC_SUBST([ABSOLUTE_STRING_H])
+])
+
+AC_DEFUN([gl_HEADER_STRING_H_DEFAULTS],
+[
+  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])
+  HAVE_DECL_MEMRCHR=1;		AC_SUBST([HAVE_DECL_MEMRCHR])
+  HAVE_STPCPY=1;		AC_SUBST([HAVE_STPCPY])
+  HAVE_STPNCPY=1;		AC_SUBST([HAVE_STPNCPY])
+  HAVE_STRCASECMP=1;		AC_SUBST([HAVE_STRCASECMP])
+  HAVE_DECL_STRNCASECMP=1;	AC_SUBST([HAVE_DECL_STRNCASECMP])
+  HAVE_STRCHRNUL=1;		AC_SUBST([HAVE_STRCHRNUL])
+  HAVE_DECL_STRDUP=1;		AC_SUBST([HAVE_DECL_STRDUP])
+  HAVE_STRNDUP=1;		AC_SUBST([HAVE_STRNDUP])
+  HAVE_DECL_STRNDUP=1;		AC_SUBST([HAVE_DECL_STRNDUP])
+  HAVE_DECL_STRNLEN=1;		AC_SUBST([HAVE_DECL_STRNLEN])
+  HAVE_STRPBRK=1;		AC_SUBST([HAVE_STRPBRK])
+  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])
+])
+
+AC_DEFUN([gl_STRING_MODULE_INDICATOR],
+[
+  dnl Use AC_REQUIRE here, so that the default settings are expanded once only.
+  AC_REQUIRE([gl_STRING_MODULE_INDICATOR_DEFAULTS])
+  GNULIB_[]m4_translit([$1],[abcdefghijklmnopqrstuvwxyz./-],[ABCDEFGHIJKLMNOPQRSTUVWXYZ___])=1
+])
+
+AC_DEFUN([gl_STRING_MODULE_INDICATOR_DEFAULTS],
+[
+  GNULIB_MEMMEM=0;      AC_SUBST([GNULIB_MEMMEM])
+  GNULIB_MEMPCPY=0;     AC_SUBST([GNULIB_MEMPCPY])
+  GNULIB_MEMRCHR=0;     AC_SUBST([GNULIB_MEMRCHR])
+  GNULIB_STPCPY=0;      AC_SUBST([GNULIB_STPCPY])
+  GNULIB_STPNCPY=0;     AC_SUBST([GNULIB_STPNCPY])
+  GNULIB_STRCHRNUL=0;   AC_SUBST([GNULIB_STRCHRNUL])
+  GNULIB_STRDUP=0;      AC_SUBST([GNULIB_STRDUP])
+  GNULIB_STRNDUP=0;     AC_SUBST([GNULIB_STRNDUP])
+  GNULIB_STRNLEN=0;     AC_SUBST([GNULIB_STRNLEN])
+  GNULIB_STRPBRK=0;     AC_SUBST([GNULIB_STRPBRK])
+  GNULIB_STRSEP=0;      AC_SUBST([GNULIB_STRSEP])
+  GNULIB_STRCASESTR=0;  AC_SUBST([GNULIB_STRCASESTR])
+  GNULIB_STRTOK_R=0;    AC_SUBST([GNULIB_STRTOK_R])
+  GNULIB_MBSLEN=0;      AC_SUBST([GNULIB_MBSLEN])
+  GNULIB_MBSCHR=0;      AC_SUBST([GNULIB_MBSCHR])
+  GNULIB_MBSRCHR=0;     AC_SUBST([GNULIB_MBSRCHR])
+  GNULIB_MBSSTR=0;      AC_SUBST([GNULIB_MBSSTR])
+  GNULIB_MBSCASECMP=0;  AC_SUBST([GNULIB_MBSCASECMP])
+  GNULIB_MBSCASESTR=0;  AC_SUBST([GNULIB_MBSCASESTR])
+  GNULIB_MBSCSPN=0;     AC_SUBST([GNULIB_MBSCSPN])
+  GNULIB_MBSPBRK=0;     AC_SUBST([GNULIB_MBSPBRK])
+  GNULIB_MBSSPN=0;      AC_SUBST([GNULIB_MBSSPN])
+  GNULIB_MBSSEP=0;      AC_SUBST([GNULIB_MBSSEP])
+  GNULIB_MBSTOK_R=0;    AC_SUBST([GNULIB_MBSTOK_R])
+])
diff --git a/gl/string_.h b/gl/string_.h
new file mode 100644
index 0000000..8a5cd50
--- /dev/null
+++ b/gl/string_.h
@@ -0,0 +1,497 @@
+/* A GNU-like <string.h>.
+
+   Copyright (C) 1995-1996, 2001-2007 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 2, 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.  */
+
+#ifndef _GL_STRING_H
+#define _GL_STRING_H
+
+#include @ABSOLUTE_STRING_H@
+
+
+/* GL_LINK_WARNING("literal string") arranges to emit the literal string as
+   a linker warning on most glibc systems.
+   We use a linker warning rather than a preprocessor warning, because
+   #warning cannot be used inside macros.  */
+#ifndef GL_LINK_WARNING
+  /* This works on platforms with GNU ld and ELF object format.
+     Testing __GLIBC__ is sufficient for asserting that GNU ld is in use.
+     Testing __ELF__ guarantees the ELF object format.
+     Testing __GNUC__ is necessary for the compound expression syntax.  */
+# if defined __GLIBC__ && defined __ELF__ && defined __GNUC__
+#  define GL_LINK_WARNING(message) \
+     GL_LINK_WARNING1 (__FILE__, __LINE__, message)
+#  define GL_LINK_WARNING1(file, line, message) \
+     GL_LINK_WARNING2 (file, line, message)  /* macroexpand file and line */
+#  define GL_LINK_WARNING2(file, line, message) \
+     GL_LINK_WARNING3 (file ":" #line ": warning: " message)
+#  define GL_LINK_WARNING3(message) \
+     ({ static const char warning[sizeof (message)]		\
+          __attribute__ ((__unused__,				\
+                          __section__ (".gnu.warning"),		\
+                          __aligned__ (1)))			\
+          = message "\n";					\
+        (void)0;						\
+     })
+# else
+#  define GL_LINK_WARNING(message) ((void) 0)
+# endif
+#endif
+
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Return the first occurrence of NEEDLE in HAYSTACK.  */
+#if @GNULIB_MEMMEM@
+# if ! @HAVE_DECL_MEMMEM@
+extern void *memmem (void const *__haystack, size_t __haystack_len,
+		     void const *__needle, size_t __needle_len);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef memmem
+# define memmem(a,al,b,bl) \
+    (GL_LINK_WARNING ("memmem is unportable - use gnulib module memmem for portability"), \
+     memmem (a, al, b, bl))
+#endif
+
+/* Copy N bytes of SRC to DEST, return pointer to bytes after the
+   last written byte.  */
+#if @GNULIB_MEMPCPY@
+# if ! @HAVE_MEMPCPY@
+extern void *mempcpy (void *restrict __dest, void const *restrict __src,
+		      size_t __n);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef mempcpy
+# define mempcpy(a,b,n) \
+    (GL_LINK_WARNING ("mempcpy is unportable - use gnulib module mempcpy for portability"), \
+     mempcpy (a, b, n))
+#endif
+
+/* Search backwards through a block for a byte (specified as an int).  */
+#if @GNULIB_MEMRCHR@
+# if ! @HAVE_DECL_MEMRCHR@
+extern void *memrchr (void const *, int, size_t);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef memrchr
+# define memrchr(a,b,c) \
+    (GL_LINK_WARNING ("memrchr is unportable - use gnulib module memrchr for portability"), \
+     memrchr (a, b, c))
+#endif
+
+/* Copy SRC to DST, returning the address of the terminating '\0' in DST.  */
+#if @GNULIB_STPCPY@
+# if ! @HAVE_STPCPY@
+extern char *stpcpy (char *restrict __dst, char const *restrict __src);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef stpcpy
+# define stpcpy(a,b) \
+    (GL_LINK_WARNING ("stpcpy is unportable - use gnulib module stpcpy for portability"), \
+     stpcpy (a, b))
+#endif
+
+/* Copy no more than N bytes of SRC to DST, returning a pointer past the
+   last non-NUL byte written into DST.  */
+#if @GNULIB_STPNCPY@
+# if ! @HAVE_STPNCPY@
+#  define stpncpy gnu_stpncpy
+extern char *stpncpy (char *restrict __dst, char const *restrict __src,
+		      size_t __n);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef stpncpy
+# define stpncpy(a,b,n) \
+    (GL_LINK_WARNING ("stpncpy is unportable - use gnulib module stpncpy for portability"), \
+     stpncpy (a, b, n))
+#endif
+
+/* Compare strings S1 and S2, ignoring case, returning less than, equal to or
+   greater than zero if S1 is lexicographically less than, equal to or greater
+   than S2.
+   Note: This function does not work in multibyte locales.  */
+#if ! @HAVE_STRCASECMP@
+extern int strcasecmp (char const *s1, char const *s2);
+#endif
+#if defined GNULIB_POSIXCHECK
+/* strcasecmp() does not work with multibyte strings:
+   POSIX says that it operates on "strings", and "string" in POSIX is defined
+   as a sequence of bytes, not of characters.   */
+# undef strcasecmp
+# define strcasecmp(a,b) \
+    (GL_LINK_WARNING ("strcasecmp cannot work correctly on character strings in multibyte locales - use mbscasecmp if you care about internationalization, or use c_strcasecmp (from gnulib module c-strcase) if you want a locale independent function"), \
+     strcasecmp (a, b))
+#endif
+
+/* Compare no more than N bytes of strings S1 and S2, ignoring case,
+   returning less than, equal to or greater than zero if S1 is
+   lexicographically less than, equal to or greater than S2.
+   Note: This function cannot work correctly in multibyte locales.  */
+#if ! @HAVE_DECL_STRNCASECMP@
+extern int strncasecmp (char const *s1, char const *s2, size_t n);
+#endif
+#if defined GNULIB_POSIXCHECK
+/* strncasecmp() does not work with multibyte strings:
+   POSIX says that it operates on "strings", and "string" in POSIX is defined
+   as a sequence of bytes, not of characters.  */
+# undef strncasecmp
+# define strncasecmp(a,b,n) \
+    (GL_LINK_WARNING ("strncasecmp cannot work correctly on character strings in multibyte locales - don't use it if you care about internationalization; use c_strncasecmp (from gnulib module c-strcase) if you want a locale independent function"), \
+     strncasecmp (a, b, n))
+#endif
+
+#if defined GNULIB_POSIXCHECK
+/* strchr() does not work with multibyte strings if the locale encoding is
+   GB18030 and the character to be searched is a digit.  */
+# undef strchr
+# define strchr(s,c) \
+    (GL_LINK_WARNING ("strchr cannot work correctly on character strings in some multibyte locales - use mbschr if you care about internationalization"), \
+     strchr (s, c))
+#endif
+
+/* Find the first occurrence of C in S or the final NUL byte.  */
+#if @GNULIB_STRCHRNUL@
+# if ! @HAVE_STRCHRNUL@
+extern char *strchrnul (char const *__s, int __c_in);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef strchrnul
+# define strchrnul(a,b) \
+    (GL_LINK_WARNING ("strchrnul is unportable - use gnulib module strchrnul for portability"), \
+     strchrnul (a, b))
+#endif
+
+/* Duplicate S, returning an identical malloc'd string.  */
+#if @GNULIB_STRDUP@
+# if ! @HAVE_DECL_STRDUP@ && ! defined strdup
+extern char *strdup (char const *__s);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef strdup
+# define strdup(a) \
+    (GL_LINK_WARNING ("strdup is unportable - use gnulib module strdup for portability"), \
+     strdup (a))
+#endif
+
+/* Return a newly allocated copy of at most N bytes of STRING.  */
+#if @GNULIB_STRNDUP@
+# if ! @HAVE_STRNDUP@
+#  undef strndup
+#  define strndup rpl_strndup
+#  if ! @HAVE_DECL_STRNDUP@
+extern char *strndup (char const *__string, size_t __n);
+#  endif
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef strndup
+# define strndup(a,n) \
+    (GL_LINK_WARNING ("strndup is unportable - use gnulib module strndup for portability"), \
+     strndup (a, n))
+#endif
+
+/* Find the length (number of bytes) of STRING, but scan at most
+   MAXLEN bytes.  If no '\0' terminator is found in that many bytes,
+   return MAXLEN.  */
+#if @GNULIB_STRNLEN@
+# if ! @HAVE_DECL_STRNLEN@
+extern size_t strnlen (char const *__string, size_t __maxlen);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef strnlen
+# define strnlen(a,n) \
+    (GL_LINK_WARNING ("strnlen is unportable - use gnulib module strnlen for portability"), \
+     strnlen (a, n))
+#endif
+
+#if defined GNULIB_POSIXCHECK
+/* strcspn() assumes the second argument is a list of single-byte characters.
+   Even in this simple case, it does not work with multibyte strings if the
+   locale encoding is GB18030 and one of the characters to be searched is a
+   digit.  */
+# undef strcspn
+# define strcspn(s,a) \
+    (GL_LINK_WARNING ("strcspn cannot work correctly on character strings in multibyte locales - use mbscspn if you care about internationalization"), \
+     strcspn (s, a))
+#endif
+
+/* Find the first occurrence in S of any character in ACCEPT.  */
+#if @GNULIB_STRPBRK@
+# if ! @HAVE_STRPBRK@
+extern char *strpbrk (char const *__s, char const *__accept);
+# endif
+# if defined GNULIB_POSIXCHECK
+/* strpbrk() assumes the second argument is a list of single-byte characters.
+   Even in this simple case, it does not work with multibyte strings if the
+   locale encoding is GB18030 and one of the characters to be searched is a
+   digit.  */
+#  undef strpbrk
+#  define strpbrk(s,a) \
+     (GL_LINK_WARNING ("strpbrk cannot work correctly on character strings in multibyte locales - use mbspbrk if you care about internationalization"), \
+      strpbrk (s, a))
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef strpbrk
+# define strpbrk(s,a) \
+    (GL_LINK_WARNING ("strpbrk is unportable - use gnulib module strpbrk for portability"), \
+     strpbrk (s, a))
+#endif
+
+#if defined GNULIB_POSIXCHECK
+/* strspn() assumes the second argument is a list of single-byte characters.
+   Even in this simple case, it cannot work with multibyte strings.  */
+# undef strspn
+# define strspn(s,a) \
+    (GL_LINK_WARNING ("strspn cannot work correctly on character strings in multibyte locales - use mbsspn if you care about internationalization"), \
+     strspn (s, a))
+#endif
+
+#if defined GNULIB_POSIXCHECK
+/* strrchr() does not work with multibyte strings if the locale encoding is
+   GB18030 and the character to be searched is a digit.  */
+# undef strrchr
+# define strrchr(s,c) \
+    (GL_LINK_WARNING ("strrchr cannot work correctly on character strings in some multibyte locales - use mbsrchr if you care about internationalization"), \
+     strrchr (s, c))
+#endif
+
+/* Search the next delimiter (char listed in DELIM) starting at *STRINGP.
+   If one is found, overwrite it with a NUL, and advance *STRINGP
+   to point to the next char after it.  Otherwise, set *STRINGP to NULL.
+   If *STRINGP was already NULL, nothing happens.
+   Return the old value of *STRINGP.
+
+   This is a variant of strtok() that is multithread-safe and supports
+   empty fields.
+
+   Caveat: It modifies the original string.
+   Caveat: These functions cannot be used on constant strings.
+   Caveat: The identity of the delimiting character is lost.
+   Caveat: It doesn't work with multibyte strings unless all of the delimiter
+           characters are ASCII characters < 0x30.
+
+   See also strtok_r().  */
+#if @GNULIB_STRSEP@
+# if ! @HAVE_STRSEP@
+extern char *strsep (char **restrict __stringp, char const *restrict __delim);
+# endif
+# if defined GNULIB_POSIXCHECK
+#  undef strsep
+#  define strsep(s,d) \
+     (GL_LINK_WARNING ("strsep cannot work correctly on character strings in multibyte locales - use mbssep if you care about internationalization"), \
+      strsep (s, d))
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef strsep
+# define strsep(s,d) \
+    (GL_LINK_WARNING ("strsep is unportable - use gnulib module strsep for portability"), \
+     strsep (s, d))
+#endif
+
+#if defined GNULIB_POSIXCHECK
+/* strstr() does not work with multibyte strings if the locale encoding is
+   different from UTF-8:
+   POSIX says that it operates on "strings", and "string" in POSIX is defined
+   as a sequence of bytes, not of characters.  */
+# undef strstr
+# define strstr(a,b) \
+    (GL_LINK_WARNING ("strstr cannot work correctly on character strings in most multibyte locales - use mbsstr if you care about internationalization"), \
+     strstr (a, b))
+#endif
+
+/* Find the first occurrence of NEEDLE in HAYSTACK, using case-insensitive
+   comparison.  */
+#if ! @HAVE_STRCASESTR@
+extern char *strcasestr (const char *haystack, const char *needle);
+#endif
+#if defined GNULIB_POSIXCHECK
+/* strcasestr() does not work with multibyte strings:
+   It is a glibc extension, and glibc implements it only for unibyte
+   locales.  */
+# undef strcasestr
+# define strcasestr(a,b) \
+    (GL_LINK_WARNING ("strcasestr does work correctly on character strings in multibyte locales - use mbscasestr if you care about internationalization, or use c-strcasestr if you want a locale independent function"), \
+     strcasestr (a, b))
+#endif
+
+/* Parse S into tokens separated by characters in DELIM.
+   If S is NULL, the saved pointer in SAVE_PTR is used as
+   the next starting point.  For example:
+	char s[] = "-abc-=-def";
+	char *sp;
+	x = strtok_r(s, "-", &sp);	// x = "abc", sp = "=-def"
+	x = strtok_r(NULL, "-=", &sp);	// x = "def", sp = NULL
+	x = strtok_r(NULL, "=", &sp);	// x = NULL
+		// s = "abc\0-def\0"
+
+   This is a variant of strtok() that is multithread-safe.
+
+   For the POSIX documentation for this function, see:
+   http://www.opengroup.org/susv3xsh/strtok.html
+
+   Caveat: It modifies the original string.
+   Caveat: These functions cannot be used on constant strings.
+   Caveat: The identity of the delimiting character is lost.
+   Caveat: It doesn't work with multibyte strings unless all of the delimiter
+           characters are ASCII characters < 0x30.
+
+   See also strsep().  */
+#if @GNULIB_STRTOK_R@
+# if ! @HAVE_DECL_STRTOK_R@
+extern char *strtok_r (char *restrict s, char const *restrict delim,
+		       char **restrict save_ptr);
+# endif
+# if defined GNULIB_POSIXCHECK
+#  undef strtok_r
+#  define strtok_r(s,d,p) \
+     (GL_LINK_WARNING ("strtok_r cannot work correctly on character strings in multibyte locales - use mbstok_r if you care about internationalization"), \
+      strtok_r (s, d, p))
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef strtok_r
+# define strtok_r(s,d,p) \
+    (GL_LINK_WARNING ("strtok_r is unportable - use gnulib module strtok_r for portability"), \
+     strtok_r (s, d, p))
+#endif
+
+
+/* The following functions are not specified by POSIX.  They are gnulib
+   extensions.  */
+
+#if @GNULIB_MBSLEN@
+/* Return the number of multibyte characters in the character string STRING.
+   This considers multibyte characters, unlike strlen, which counts bytes.  */
+extern size_t mbslen (const char *string);
+#endif
+
+#if @GNULIB_MBSCHR@
+/* Locate the first single-byte character C in the character string STRING,
+   and return a pointer to it.  Return NULL if C is not found in STRING.
+   Unlike strchr(), this function works correctly in multibyte locales with
+   encodings such as GB18030.  */
+# define mbschr rpl_mbschr /* avoid collision with HP-UX function */
+extern char * mbschr (const char *string, int c);
+#endif
+
+#if @GNULIB_MBSRCHR@
+/* Locate the last single-byte character C in the character string STRING,
+   and return a pointer to it.  Return NULL if C is not found in STRING.
+   Unlike strrchr(), this function works correctly in multibyte locales with
+   encodings such as GB18030.  */
+# define mbsrchr rpl_mbsrchr /* avoid collision with HP-UX function */
+extern char * mbsrchr (const char *string, int c);
+#endif
+
+#if @GNULIB_MBSSTR@
+/* Find the first occurrence of the character string NEEDLE in the character
+   string HAYSTACK.  Return NULL if NEEDLE is not found in HAYSTACK.
+   Unlike strstr(), this function works correctly in multibyte locales with
+   encodings different from UTF-8.  */
+extern char * mbsstr (const char *haystack, const char *needle);
+#endif
+
+#if @GNULIB_MBSCASECMP@
+/* Compare the character strings S1 and S2, ignoring case, returning less than,
+   equal to or greater than zero if S1 is lexicographically less than, equal to
+   or greater than S2.
+   Note: This function may, in multibyte locales, return 0 for strings of
+   different lengths!
+   Unlike strcasecmp(), this function works correctly in multibyte locales.  */
+extern int mbscasecmp (const char *s1, const char *s2);
+#endif
+
+#if @GNULIB_MBSCASESTR@
+/* Find the first occurrence of the character string NEEDLE in the character
+   string HAYSTACK, using case-insensitive comparison.
+   Note: This function may, in multibyte locales, return success even if
+   strlen (haystack) < strlen (needle) !
+   Unlike strcasestr(), this function works correctly in multibyte locales.  */
+extern char * mbscasestr (const char *haystack, const char *needle);
+#endif
+
+#if @GNULIB_MBSCSPN@
+/* Find the first occurrence in the character string STRING of any character
+   in the character string ACCEPT.  Return the number of bytes from the
+   beginning of the string to this occurrence, or to the end of the string
+   if none exists.
+   Unlike strcspn(), this function works correctly in multibyte locales.  */
+extern size_t mbscspn (const char *string, const char *accept);
+#endif
+
+#if @GNULIB_MBSPBRK@
+/* Find the first occurrence in the character string STRING of any character
+   in the character string ACCEPT.  Return the pointer to it, or NULL if none
+   exists.
+   Unlike strpbrk(), this function works correctly in multibyte locales.  */
+# define mbspbrk rpl_mbspbrk /* avoid collision with HP-UX function */
+extern char * mbspbrk (const char *string, const char *accept);
+#endif
+
+#if @GNULIB_MBSSPN@
+/* Find the first occurrence in the character string STRING of any character
+   not in the character string REJECT.  Return the number of bytes from the
+   beginning of the string to this occurrence, or to the end of the string
+   if none exists.
+   Unlike strspn(), this function works correctly in multibyte locales.  */
+extern size_t mbsspn (const char *string, const char *reject);
+#endif
+
+#if @GNULIB_MBSSEP@
+/* Search the next delimiter (multibyte character listed in the character
+   string DELIM) starting at the character string *STRINGP.
+   If one is found, overwrite it with a NUL, and advance *STRINGP to point
+   to the next multibyte character after it.  Otherwise, set *STRINGP to NULL.
+   If *STRINGP was already NULL, nothing happens.
+   Return the old value of *STRINGP.
+
+   This is a variant of mbstok_r() that supports empty fields.
+
+   Caveat: It modifies the original string.
+   Caveat: These functions cannot be used on constant strings.
+   Caveat: The identity of the delimiting character is lost.
+
+   See also mbstok_r().  */
+extern char * mbssep (char **stringp, const char *delim);
+#endif
+
+#if @GNULIB_MBSTOK_R@
+/* Parse the character string STRING into tokens separated by characters in
+   the character string DELIM.
+   If STRING is NULL, the saved pointer in SAVE_PTR is used as
+   the next starting point.  For example:
+	char s[] = "-abc-=-def";
+	char *sp;
+	x = mbstok_r(s, "-", &sp);	// x = "abc", sp = "=-def"
+	x = mbstok_r(NULL, "-=", &sp);	// x = "def", sp = NULL
+	x = mbstok_r(NULL, "=", &sp);	// x = NULL
+		// s = "abc\0-def\0"
+
+   Caveat: It modifies the original string.
+   Caveat: These functions cannot be used on constant strings.
+   Caveat: The identity of the delimiting character is lost.
+
+   See also mbssep().  */
+extern char * mbstok_r (char *string, const char *delim, char **save_ptr);
+#endif
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
diff --git a/gl/unistd_.h b/gl/unistd_.h
new file mode 100644
index 0000000..36fa673
--- /dev/null
+++ b/gl/unistd_.h
@@ -0,0 +1,52 @@
+/* Substitute for and wrapper around <unistd.h>.
+   Copyright (C) 2006 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 2, 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.  */
+
+#ifndef _GL_UNISTD_H
+#define _GL_UNISTD_H
+
+#if HAVE_UNISTD_H
+# include @ABSOLUTE_UNISTD_H@
+#endif
+
+
+/* Declare overridden functions.  */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifdef FCHDIR_REPLACEMENT
+
+/* Change the process' current working directory to the directory on which
+   the given file descriptor is open.  */
+extern int fchdir (int /*fd*/);
+
+# define close rpl_close
+extern int close (int);
+# define dup rpl_dup
+extern int dup (int);
+# define dup2 rpl_dup2
+extern int dup2 (int, int);
+
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+
+#endif /* _GL_UNISTD_H */