2 dnl Copyright (C) 2007-2010 Free Software Foundation, Inc.
3 dnl This file is free software; the Free Software Foundation
4 dnl gives unlimited permission to copy and/or distribute it,
5 dnl with or without modifications, as long as this notice is preserved.
7 AC_DEFUN([gl_FUNC_FSEEKO],
9 AC_REQUIRE([gl_STDIO_H_DEFAULTS])
10 AC_REQUIRE([AC_PROG_CC])
11 AC_REQUIRE([gl_STDIN_LARGE_OFFSET])
13 dnl Persuade glibc <stdio.h> to declare fseeko().
14 AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
16 AC_CACHE_CHECK([for fseeko], [gl_cv_func_fseeko],
18 AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <stdio.h>
19 ]], [fseeko (stdin, 0, 0);])],
20 [gl_cv_func_fseeko=yes], [gl_cv_func_fseeko=no])
22 if test $gl_cv_func_fseeko = no \
23 || test $gl_cv_var_stdin_large_offset = no; then
28 AC_DEFUN([gl_REPLACE_FSEEKO],
31 AC_REQUIRE([gl_STDIO_H_DEFAULTS])
33 dnl If we are also using the fseek module, then fseek needs replacing, too.
34 m4_ifdef([gl_REPLACE_FSEEK], [gl_REPLACE_FSEEK])