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/*
* libexplain - Explain errno values returned by libc functions
* Copyright (C) 2008, 2009, 2013 Peter Miller
* Written by Peter Miller <pmiller@opensource.org.au>
*
* 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 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
* 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, see <http://www.gnu.org/licenses/>.
*/
#ifndef LIBEXPLAIN_LARGE_FILE_SUPPORT_H
#define LIBEXPLAIN_LARGE_FILE_SUPPORT_H
#include <libexplain/public_config.h>
/**
* @page lfs "Large File Support"
*
* You must enable large file support to be able to use libexplain.
* If your project uses GNU Autoconf, it is simply a matter of adding
* the AC_SYS_LARGEFILE macro to your configure.ac file. If not, you
* need to add -D_FILE_OFFSET_BITS=64 to your CFLAGS definition (this
* is not completely portable, consider using GNU Autoconf instead).
*
* Large file support is needed in order to be able to access files
* larger than 2GB in size. Some fundamental data types, such as
* off_t, are defined differently, and this has many follow-on effects.
* A libexplain design decision was to support large files, and this in
* turn means that clients of libexplain must also enable large file
* support, so that libexplain and its client programs are using the
* same data sizes. (Failure to do so leads to hard-to-find memory
* scribbles and segfaults.)
*/
#if ((defined(LIBEXPLAIN_FILE_OFFSET_BITS) && \
(LIBEXPLAIN_FILE_OFFSET_BITS-0 != _FILE_OFFSET_BITS-0)) || \
(defined(LIBEXPLAIN_LARGEFILE_SOURCE) && !defined(_LARGEFILE_SOURCE)) || \
(defined(LIBEXPLAIN_LARGE_FILES) && !defined(_LARGE_FILES)))
#error "\
You must enable large file support to be able to use libexplain. If \
your project uses GNU Autoconf, it is simply a matter of adding the \
AC_SYS_LARGEFILE macro to your configure.ac file.\
"
.large/file.support/error.
#endif
#endif /* LIBEXPLAIN_LARGE_FILE_SUPPORT_H */
/* vim: set ts=8 sw=4 et : */
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