X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=m4%2Fftello.m4;h=2dff6ee9a83c7ed17cfc4ffa913951b6fbc51756;hb=bab2788c97413229d3a49b65ca3f2fc9ad32377d;hp=c2b826df8a59efbf988aeb45f1fca8fba5612f09;hpb=fec1b18ce53b4f697d57bd3fa71c6aef1561cd99;p=gnulib.git

diff --git a/m4/ftello.m4 b/m4/ftello.m4
index c2b826df8..2dff6ee9a 100644
--- a/m4/ftello.m4
+++ b/m4/ftello.m4
@@ -1,5 +1,5 @@
-# ftello.m4 serial 1
-dnl Copyright (C) 2007 Free Software Foundation, Inc.
+# ftello.m4 serial 5
+dnl Copyright (C) 2007, 2008, 2009, 2010 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.
@@ -8,12 +8,25 @@ 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
+  if test $gl_cv_func_ftello = no \
+      || 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
+])