X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=m4%2Fdup2.m4;h=054982359e8797502185fdd66064a47c7d3eedfd;hb=31d3154399f8c679ba23afb0f6bef03b73d4c741;hp=bf8524e14699ca8d483cf907a75e9d062edb927a;hpb=7c3f8da8f075e3813ced160d5b53a28c6f7dfe78;p=gnulib.git

diff --git a/m4/dup2.m4 b/m4/dup2.m4
index bf8524e14..054982359 100644
--- a/m4/dup2.m4
+++ b/m4/dup2.m4
@@ -1,10 +1,15 @@
-#serial 4
-dnl Copyright (C) 2002, 2005 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
+    HAVE_DUP2=0
+    AC_LIBOBJ([dup2])
+  fi
 ])