X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=m4%2Fdup2.m4;h=bf8524e14699ca8d483cf907a75e9d062edb927a;hb=31507e5ef8d0839ae990c00c08289803301c93fc;hp=31af8044d6424694fb6f7f3f751dfe78a29da062;hpb=e74d04a8682cb37afd40f7f7d55580e3e97b48ce;p=gnulib.git

diff --git a/m4/dup2.m4 b/m4/dup2.m4
index 31af8044d..bf8524e14 100644
--- a/m4/dup2.m4
+++ b/m4/dup2.m4
@@ -1,4 +1,4 @@
-#serial 3
+#serial 4
 dnl Copyright (C) 2002, 2005 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -7,12 +7,4 @@ dnl with or without modifications, as long as this notice is preserved.
 AC_DEFUN([gl_FUNC_DUP2],
 [
   AC_REPLACE_FUNCS(dup2)
-  if test $ac_cv_func_dup2 = no; then
-    gl_PREREQ_DUP2
-  fi
-])
-
-# Prerequisites of lib/dup2.c.
-AC_DEFUN([gl_PREREQ_DUP2], [
-  AC_CHECK_HEADERS_ONCE(unistd.h)
 ])