* don't build TCP component if we don't have IP sockets :)

This commit was SVN r6716.

ompi/mca/btl/tcp/configure.m4

@@ -0,0 +1,29 @@
+# -*- shell-script -*-
+#
+# Copyright (c) 2004-2005 The Trustees of Indiana University.
+#                         All rights reserved.
+# Copyright (c) 2004-2005 The Trustees of the University of Tennessee.
+#                         All rights reserved.
+# Copyright (c) 2004-2005 High Performance Computing Center Stuttgart, 
+#                         University of Stuttgart.  All rights reserved.
+# Copyright (c) 2004-2005 The Regents of the University of California.
+#                         All rights reserved.
+# $COPYRIGHT$
+# 
+# Additional copyrights may follow
+# 
+# $HEADER$
+#
+
+# MCA_btl_tcp_CONFIG([action-if-found], [action-if-not-found])
+# -----------------------------------------------------------
+AC_DEFUN([MCA_btl_tcp_CONFIG],[
+    # check for sockaddr_in (a good sign we have TCP)
+    AC_CHECK_TYPES([struct sockaddr_in], 
+                   [$1],
+                   [$2], 
+                   [AC_INCLUDES_DEFAULT
+#ifdef HAVE_NETINET_IN_H
+#include <netinet/in.h>
+#endif])
+])dnl