tools: cxd56: mkspk: automate mkspk build

the mkspk tool will automaticaly be built if CONFIG_CXD56_BINARY
is set.

Test:
nuttx.spk was succesfully generated

Signed-off-by: Alin Jerpelea <alin.jerpelea@sony.com>

tools/Makefile.host

@@ -261,6 +261,7 @@ ifneq ($(CONFIG_WINDOWS_NATIVE),y)
 	$(Q) rm -rf *.dSYM
 endif
 	$(Q) $(MAKE) -C pic32 -f Makefile.host clean
+	$(Q) $(MAKE) -C cxd56 -f Makefile.host clean
 	$(call DELFILE, incdir)
 	$(call DELFILE, incdir.exe)
 	$(call CLEAN)

tools/cxd56/Config.mk

@@ -0,0 +1,38 @@
+############################################################################
+# tools/cxd56/Config.mk
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.  The
+# ASF licenses this file to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance with the
+# License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+# License for the specific language governing permissions and limitations
+# under the License.
+#
+############################################################################
+
+# These are the macros that will be used in the NuttX make system to compile
+# and assembly source files and to insert the resulting object files into an
+# archive.  These replace the default definitions at tools/Config.mk
+
+# POSTBUILD -- Perform post build operations
+
+
+ifeq ($(CONFIG_CXD56_BINARY),y)
+
+define POSTBUILD
+	$(Q)echo "Generating: $(NUTTXNAME).spk"; \
+
+	+$(Q) $(MAKE) -C $(TOPDIR)$(DELIM)tools$(DELIM)cxd56 -f Makefile.host
+	tools$(DELIM)cxd56$(DELIM)mkspk$(HOSTEXEEXT) -c2 nuttx nuttx nuttx.spk;
+	$(Q)([ $$? -eq 0 ] && echo "Done.")
+endef
+
+endif

tools/cxd56/Makefile.host

@@ -1,5 +1,5 @@
 ############################################################################
-# tools/mkspk/Makefile
+# tools/cxd56/Makefile.host
 #
 #   Copyright (C) 2011-2012 Gregory Nutt. All rights reserved.
 #   Author: Gregory Nutt <gnutt@nuttx.org>