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diff --git a/lib/errno.in.h b/lib/errno.in.h
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+++ b/lib/errno.in.h
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+/* A POSIX-like <errno.h>.
+
+ Copyright (C) 2008-2009 Free Software Foundation, Inc.
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU Lesser 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 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. */
+
+#ifndef _GL_ERRNO_H
+
+#if __GNUC__ >= 3
+@PRAGMA_SYSTEM_HEADER@
+#endif
+
+/* The include_next requires a split double-inclusion guard. */
+#@INCLUDE_NEXT@ @NEXT_ERRNO_H@
+
+#ifndef _GL_ERRNO_H
+#define _GL_ERRNO_H
+
+
+/* On native Windows platforms, many macros are not defined. */
+# if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__
+
+/* POSIX says that EAGAIN and EWOULDBLOCK may have the same value. */
+# define EWOULDBLOCK EAGAIN
+
+/* Values >= 100 seem safe to use. */
+# define ETXTBSY 100
+# define GNULIB_defined_ETXTBSY 1
+
+/* These are intentionally the same values as the WSA* error numbers, defined
+ in <winsock2.h>. */
+# define EINPROGRESS 10036
+# define EALREADY 10037
+# define ENOTSOCK 10038
+# define EDESTADDRREQ 10039
+# define EMSGSIZE 10040
+# define EPROTOTYPE 10041
+# define ENOPROTOOPT 10042
+# define EPROTONOSUPPORT 10043
+# define ESOCKTNOSUPPORT 10044 /* not required by POSIX */
+# define EOPNOTSUPP 10045
+# define EPFNOSUPPORT 10046 /* not required by POSIX */
+# define EAFNOSUPPORT 10047
+# define EADDRINUSE 10048
+# define EADDRNOTAVAIL 10049
+# define ENETDOWN 10050
+# define ENETUNREACH 10051
+# define ENETRESET 10052
+# define ECONNABORTED 10053
+# define ECONNRESET 10054
+# define ENOBUFS 10055
+# define EISCONN 10056
+# define ENOTCONN 10057
+# define ESHUTDOWN 10058 /* not required by POSIX */
+# define ETOOMANYREFS 10059 /* not required by POSIX */
+# define ETIMEDOUT 10060
+# define ECONNREFUSED 10061
+# define ELOOP 10062
+# define EHOSTDOWN 10064 /* not required by POSIX */
+# define EHOSTUNREACH 10065
+# define EPROCLIM 10067 /* not required by POSIX */
+# define EUSERS 10068 /* not required by POSIX */
+# define EDQUOT 10069
+# define ESTALE 10070
+# define EREMOTE 10071 /* not required by POSIX */
+# define GNULIB_defined_ESOCK 1
+
+# endif
+
+
+/* On OSF/1 5.1, when _XOPEN_SOURCE_EXTENDED is not defined, the macros
+ EMULTIHOP, ENOLINK, EOVERFLOW are not defined. */
+# if @EMULTIHOP_HIDDEN@
+# define EMULTIHOP @EMULTIHOP_VALUE@
+# define GNULIB_defined_EMULTIHOP 1
+# endif
+# if @ENOLINK_HIDDEN@
+# define ENOLINK @ENOLINK_VALUE@
+# define GNULIB_defined_ENOLINK 1
+# endif
+# if @EOVERFLOW_HIDDEN@
+# define EOVERFLOW @EOVERFLOW_VALUE@
+# define GNULIB_defined_EOVERFLOW 1
+# endif
+
+
+/* On OpenBSD 4.0 and on native Windows, the macros ENOMSG, EIDRM, ENOLINK,
+ EPROTO, EMULTIHOP, EBADMSG, EOVERFLOW, ENOTSUP, ECANCELED are not defined.
+ Define them here. Values >= 2000 seem safe to use: Solaris ESTALE = 151,
+ HP-UX EWOULDBLOCK = 246, IRIX EDQUOT = 1133.
+
+ Note: When one of these systems defines some of these macros some day,
+ binaries will have to be recompiled so that they recognizes the new
+ errno values from the system. */
+
+# ifndef ENOMSG
+# define ENOMSG 2000
+# define GNULIB_defined_ENOMSG 1
+# endif
+
+# ifndef EIDRM
+# define EIDRM 2001
+# define GNULIB_defined_EIDRM 1
+# endif
+
+# ifndef ENOLINK
+# define ENOLINK 2002
+# define GNULIB_defined_ENOLINK 1
+# endif
+
+# ifndef EPROTO
+# define EPROTO 2003
+# define GNULIB_defined_EPROTO 1
+# endif
+
+# ifndef EMULTIHOP
+# define EMULTIHOP 2004
+# define GNULIB_defined_EMULTIHOP 1
+# endif
+
+# ifndef EBADMSG
+# define EBADMSG 2005
+# define GNULIB_defined_EBADMSG 1
+# endif
+
+# ifndef EOVERFLOW
+# define EOVERFLOW 2006
+# define GNULIB_defined_EOVERFLOW 1
+# endif
+
+# ifndef ENOTSUP
+# define ENOTSUP 2007
+# define GNULIB_defined_ENOTSUP 1
+# endif
+
+# ifndef ESTALE
+# define ESTALE 2009
+# define GNULIB_defined_ESTALE 1
+# endif
+
+# ifndef ECANCELED
+# define ECANCELED 2008
+# define GNULIB_defined_ECANCELED 1
+# endif
+
+
+#endif /* _GL_ERRNO_H */
+#endif /* _GL_ERRNO_H */