--- /dev/null
+# ftello.m4 serial 4
+dnl Copyright (C) 2007, 2008 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_FUNC_FTELLO],
+[
+ AC_REQUIRE([gl_STDIO_H_DEFAULTS])
+ AC_REQUIRE([AC_PROG_CC])
+ AC_REQUIRE([gl_STDIN_LARGE_OFFSET])
+
+ dnl Persuade glibc <stdio.h> to declare fseeko().
+ AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
+
+ AC_CACHE_CHECK([for ftello], [gl_cv_func_ftello],
+ [
+ AC_TRY_LINK([#include <stdio.h>], [ftello (stdin);],
+ [gl_cv_func_ftello=yes], [gl_cv_func_ftello=no])
+ ])
+ if test $gl_cv_func_ftello = no; then
+ HAVE_FTELLO=0
+ gl_REPLACE_FTELLO
+ elif test $gl_cv_var_stdin_large_offset = no; then
+ gl_REPLACE_FTELLO
+ fi
+])
+
+AC_DEFUN([gl_REPLACE_FTELLO],
+[
+ AC_LIBOBJ([ftello])
+ AC_REQUIRE([gl_STDIO_H_DEFAULTS])
+ REPLACE_FTELLO=1
+])