X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=m4%2Ffseeko.m4;h=b97df53377bdee9e5849be768222607db77d21d2;hb=217ec874c8e4610ce407f0204c4e3fe30b7c76ec;hp=fd3f019f7ff2228acaf157f26b26ff14036b184e;hpb=16332895663c60d815322830a027ec5f660e2639;p=gnulib.git

diff --git a/m4/fseeko.m4 b/m4/fseeko.m4
index fd3f019f7..b97df5337 100644
--- a/m4/fseeko.m4
+++ b/m4/fseeko.m4
@@ -1,5 +1,5 @@
-# fseeko.m4 serial 1
-dnl Copyright (C) 2007 Free Software Foundation, Inc.
+# fseeko.m4 serial 9
+dnl Copyright (C) 2007-2010 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.
@@ -7,18 +7,44 @@ dnl with or without modifications, as long as this notice is preserved.
 AC_DEFUN([gl_FUNC_FSEEKO],
 [
   AC_REQUIRE([gl_STDIO_H_DEFAULTS])
-  gl_CHECK_FSEEKO
+  AC_REQUIRE([gl_HAVE_FSEEKO])
+  AC_REQUIRE([gl_STDIN_LARGE_OFFSET])
+
   if test $gl_cv_func_fseeko = no; then
     HAVE_FSEEKO=0
+    gl_REPLACE_FSEEKO
+  else
+    if test $gl_cv_var_stdin_large_offset = no; then
+      gl_REPLACE_FSEEKO
+    fi
   fi
 ])
 
-AC_DEFUN([gl_CHECK_FSEEKO],
+dnl Tests whether fseeko is available.
+dnl Result is gl_cv_func_fseeko.
+AC_DEFUN([gl_HAVE_FSEEKO],
 [
   AC_REQUIRE([AC_PROG_CC])
+
+  dnl Persuade glibc <stdio.h> to declare fseeko().
+  AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
+
   AC_CACHE_CHECK([for fseeko], [gl_cv_func_fseeko],
     [
-      AC_TRY_LINK([#include <stdio.h>], [fseeko (stdin, 0, 0);],
+      AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <stdio.h>
+]], [fseeko (stdin, 0, 0);])],
         [gl_cv_func_fseeko=yes], [gl_cv_func_fseeko=no])
     ])
 ])
+
+AC_DEFUN([gl_REPLACE_FSEEKO],
+[
+  AC_REQUIRE([gl_STDIO_H_DEFAULTS])
+  AC_REQUIRE([gl_HAVE_FSEEKO])
+  if test $gl_cv_func_fseeko = yes; then
+    REPLACE_FSEEKO=1
+  fi
+  AC_LIBOBJ([fseeko])
+  dnl If we are also using the fseek module, then fseek needs replacing, too.
+  m4_ifdef([gl_REPLACE_FSEEK], [gl_REPLACE_FSEEK])
+])