1# fseeko.m4 serial 4
2dnl Copyright (C) 2007, 2008, 2009 Free Software Foundation, Inc.
3dnl This file is free software; the Free Software Foundation
4dnl gives unlimited permission to copy and/or distribute it,
5dnl with or without modifications, as long as this notice is preserved.
6
7AC_DEFUN([gl_FUNC_FSEEKO],
8[
9  AC_REQUIRE([gl_STDIO_H_DEFAULTS])
10  AC_REQUIRE([AC_PROG_CC])
11  AC_REQUIRE([gl_STDIN_LARGE_OFFSET])
12
13  dnl Persuade glibc <stdio.h> to declare fseeko().
14  AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
15
16  AC_CACHE_CHECK([for fseeko], [gl_cv_func_fseeko],
17    [
18      AC_TRY_LINK([#include <stdio.h>], [fseeko (stdin, 0, 0);],
19	[gl_cv_func_fseeko=yes], [gl_cv_func_fseeko=no])
20    ])
21  if test $gl_cv_func_fseeko = no; then
22    HAVE_FSEEKO=0
23    gl_REPLACE_FSEEKO
24  elif test $gl_cv_var_stdin_large_offset = no; then
25    gl_REPLACE_FSEEKO
26  fi
27])
28
29AC_DEFUN([gl_REPLACE_FSEEKO],
30[
31  AC_LIBOBJ([fseeko])
32  AC_REQUIRE([gl_STDIO_H_DEFAULTS])
33  REPLACE_FSEEKO=1
34])
35