Move more declarations into <unistd.h>.

[gnulib.git] / m4 / dup2.m4

diff --git a/m4/dup2.m4 b/m4/dup2.m4
index bf8524e..0549823 100644 (file)
--- 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
 ])