Support multiple plugin build in the sample-plugin

This follows the setup in the src/plugins directory, and allows
multiple plugin build independent of the main vpp source tree.

Change-Id: I9e20f4087d72ad89c6dc3f505bace4628385a40e
Signed-off-by: Anlu Yan <ayan@cisco.com>

3 files changed, 52 insertions, 18 deletions

diff --git a/src/examples/sample-plugin/Makefile.am b/src/examples/sample-plugin/Makefile.am
index a105afdd52b..a3a9a8d6ed4 100644
--- a/src/examples/sample-plugin/Makefile.am
+++ b/src/examples/sample-plugin/Makefile.am
@@ -13,21 +13,22 @@
 
 AUTOMAKE_OPTIONS = foreign subdir-objects
 
-AM_CFLAGS = -Wall
+AM_CFLAGS = -Wall -I${top_srcdir} -I${top_builddir}
 AM_LDFLAGS = -module -shared -avoid-version
+AM_LIBTOOLFLAGS = --quiet
+SUFFIXES = .api.h .api .api.json
+API_FILES =
+BUILT_SOURCES =
+vppplugins_LTLIBRARIES =
+vppapitestplugins_LTLIBRARIES =
+noinst_HEADERS =
+nobase_apiinclude_HEADERS =
+ACLOCAL_AMFLAGS = -I m4
 
 vppapitestpluginsdir = ${libdir}/vpp_api_test_plugins
 vpppluginsdir = ${libdir}/vpp_plugins
 
-vppapitestplugins_LTLIBRARIES = sample_test_plugin.la
-vppplugins_LTLIBRARIES = sample_plugin.la
-
-sample_plugin_la_SOURCES = sample/sample.c sample/node.c \
-	sample/sample_plugin.api.h
-
-BUILT_SOURCES = sample/sample.api.h sample/sample.api.json
-
-SUFFIXES = .api.h .api
+include sample.am
 
 %.api.h: %.api
 	mkdir -p `dirname $@` ; \
@@ -40,15 +41,15 @@ SUFFIXES = .api.h .api
 	$(CC) $(CPPFLAGS) -E -P -C -x c $^			\
 	| vppapigen --input - --json $@
 
-apidir = $(prefix)/sample/
-api_DATA = sample/sample.api.json
+apidir = $(prefix)/api/plugins
+apiincludedir = ${includedir}/vpp_plugins
+
+api_DATA = \
+	$(patsubst %.api,%.api.json,$(API_FILES))
 
-noinst_HEADERS =				\
-  sample/sample_all_api_h.h			\
-  sample/sample_msg_enum.h			\
-  sample/sample.api.h
+BUILT_SOURCES += \
+	$(patsubst %.api,%.api.h,$(API_FILES))
 
-sample_test_plugin_la_SOURCES = sample/sample_test.c sample/sample_plugin.api.h
 
 # Remove *.la files
 install-data-hook:
diff --git a/src/examples/sample-plugin/configure.ac b/src/examples/sample-plugin/configure.ac
index 43642732950..204da2fe1de 100644
--- a/src/examples/sample-plugin/configure.ac
+++ b/src/examples/sample-plugin/configure.ac
@@ -1,4 +1,4 @@
-AC_INIT(sample_plugin, 1.0)
+AC_INIT(vpp_plugins, 1.0)
 LT_INIT
 AM_INIT_AUTOMAKE
 AM_SILENT_RULES([yes])
@@ -7,3 +7,5 @@ AC_PREFIX_DEFAULT([/usr])
 AC_PROG_CC
 
 AC_OUTPUT([Makefile])
+
+AC_CONFIG_MACRO_DIR([m4])
diff --git a/src/examples/sample-plugin/sample.am b/src/examples/sample-plugin/sample.am
new file mode 100644
index 00000000000..871b610aa73
--- /dev/null
+++ b/src/examples/sample-plugin/sample.am
@@ -0,0 +1,31 @@
+# Copyright (c) 2016 Cisco and/or its affiliates.
+# Licensed 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.
+
+vppapitestplugins_LTLIBRARIES += sample_test_plugin.la
+vppplugins_LTLIBRARIES += sample_plugin.la
+
+sample_plugin_la_SOURCES =		\
+	sample/sample.c				\
+	sample/node.c				\
+	sample/sample_plugin.api.h
+
+API_FILES += sample/sample.api
+
+nobase_apiinclude_HEADERS +=			\
+  sample/sample_all_api_h.h				\
+  sample/sample_msg_enum.h				\
+  sample/sample.api.h
+
+sample_test_plugin_la_SOURCES = sample/sample_test.c sample/sample_plugin.api.h
+
+# vi:syntax=automake