X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=m4%2Fdup2.m4;h=054982359e8797502185fdd66064a47c7d3eedfd;hb=740cb7248fef99fc09b575deb650cfe9ecabafbf;hp=ba9147da756d043b3396a869daca8ba232e04479;hpb=44d7c1c1f004fa9bfb8ec3948de2671a7958cf5b;p=gnulib.git

diff --git a/m4/dup2.m4 b/m4/dup2.m4
index ba9147da7..054982359 100644
--- a/m4/dup2.m4
+++ b/m4/dup2.m4
@@ -1,18 +1,15 @@
-# dup2.m4 serial 2
-dnl Copyright (C) 2002 Free Software Foundation, Inc.
+#serial 5
+dnl Copyright (C) 2002, 2005, 2007 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_DUP2],
 [
-  AC_REPLACE_FUNCS(dup2)
+  AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
+  AC_CHECK_FUNCS_ONCE([dup2])
   if test $ac_cv_func_dup2 = no; then
-    gl_PREREQ_DUP2
+    HAVE_DUP2=0
+    AC_LIBOBJ([dup2])
   fi
 ])
-
-# Prerequisites of lib/dup2.c.
-AC_DEFUN([gl_PREREQ_DUP2], [
-  AC_CHECK_HEADERS_ONCE(fcntl.h unistd.h)
-])