1 # This file is part of Autoconf. -*- Autoconf -*- 2 # Checking for functions. 3 # Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006 Free Software 4 # Foundation, Inc. 5 # 6 # This program is free software; you can redistribute it and/or modify 7 # it under the terms of the GNU General Public License as published by 8 # the Free Software Foundation; either version 3, or (at your option) 9 # any later version. 10 # 11 # This program is distributed in the hope that it will be useful, 12 # but WITHOUT ANY WARRANTY; without even the implied warranty of 13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 # GNU General Public License for more details. 15 # 16 # You should have received a copy of the GNU General Public License 17 # along with this program; if not, write to the Free Software 18 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 19 # 02110-1301, USA. 20 # 21 # As a special exception, the Free Software Foundation gives unlimited 22 # permission to copy, distribute and modify the configure scripts that 23 # are the output of Autoconf. You need not follow the terms of the GNU 24 # General Public License when using or distributing such scripts, even 25 # though portions of the text of Autoconf appear in them. The GNU 26 # General Public License (GPL) does govern all other use of the material 27 # that constitutes the Autoconf program. 28 # 29 # Certain portions of the Autoconf source text are designed to be copied 30 # (in certain cases, depending on the input) into the output of 31 # Autoconf. We call these the "data" portions. The rest of the Autoconf 32 # source text consists of comments plus executable code that decides which 33 # of the data portions to output in any given case. We call these 34 # comments and executable code the "non-data" portions. Autoconf never 35 # copies any of the non-data portions into its output. 36 # 37 # This special exception to the GPL applies to versions of Autoconf 38 # released by the Free Software Foundation. When you make and 39 # distribute a modified version of Autoconf, you may extend this special 40 # exception to the GPL to apply to your modified version as well, *unless* 41 # your modified version has the potential to copy into its output some 42 # of the text that was the non-data portion of the version that you started 43 # with. (In other words, unless your change moves or copies text from 44 # the non-data portions to the data portions.) If your modification has 45 # such potential, you must delete any notice of this special exception 46 # to the GPL from your modified version. 47 # 48 # Written by David MacKenzie, with help from 49 # Franc,ois Pinard, Karl Berry, Richard Pixley, Ian Lance Taylor, 50 # Roland McGrath, Noah Friedman, david d zuhn, and many others. 51 52 # AC_FUNC_FSEEKO 53 # -------------- 54 AN_FUNCTION([ftello], [AC_FUNC_FSEEKO]) 55 AN_FUNCTION([fseeko], [AC_FUNC_FSEEKO]) 56 AC_DEFUN([AC_FUNC_FSEEKO], 57 [_AC_SYS_LARGEFILE_MACRO_VALUE(_LARGEFILE_SOURCE, 1, 58 [ac_cv_sys_largefile_source], 59 [Define to 1 to make fseeko visible on some hosts (e.g. glibc 2.2).], 60 [[#include <sys/types.h> /* for off_t */ 61 #include <stdio.h>]], 62 [[int (*fp) (FILE *, off_t, int) = fseeko; 63 return fseeko (stdin, 0, 0) && fp (stdin, 0, 0);]]) 64 65 # We used to try defining _XOPEN_SOURCE=500 too, to work around a bug 66 # in glibc 2.1.3, but that breaks too many other things. 67 # If you want fseeko and ftello with glibc, upgrade to a fixed glibc. 68 if test $ac_cv_sys_largefile_source != unknown; then 69 AC_DEFINE(HAVE_FSEEKO, 1, 70 [Define to 1 if fseeko (and presumably ftello) exists and is declared.]) 71 fi 72 ])# AC_FUNC_FSEEKO 73
