THRIFT-2835 Add possibility to distribute generators separately from thrift core, and load them dynamically
Client: Compiler
Patch: Nobuaki Sukegawa, rebased by dtmuller

Also fixed by dtmuller:
* Add plugin namespace for erlang language binding
* Fix unit test test_const_value
* Don't clear type cache with every t_program conversion
* Type "wb" may not be supported by popen on non-Windows platforms
* Fix constness of AST type signatures
diff --git a/compiler/cpp/test/Makefile.am b/compiler/cpp/test/Makefile.am
new file mode 100644
index 0000000..5a23202
--- /dev/null
+++ b/compiler/cpp/test/Makefile.am
@@ -0,0 +1,51 @@
+#
+# 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.
+#
+#
+# Contains some contributions under the Thrift Software License.
+# Please see doc/old-thrift-license.txt in the Thrift distribution for
+# details.
+
+AUTOMAKE_OPTIONS = subdir-objects serial-tests
+
+AM_CPPFLAGS = $(BOOST_CPPFLAGS) -I$(top_srcdir)/compiler/cpp/src
+AM_LDFLAGS = $(BOOST_LDFLAGS)
+AM_CXXFLAGS = -Wall -Wextra -pedantic
+
+if WITH_PLUGIN
+check_PROGRAMS = plugintest
+
+noinst_PROGRAMS = thrift-gen-mycpp
+
+AM_CPPFLAGS += -I$(top_srcdir)/lib/cpp/src -I$(top_builddir)/lib/cpp/src
+
+plugintest_SOURCES = plugin/conversion_test.cc
+plugintest_LDADD = $(top_builddir)/compiler/cpp/libthriftc.la
+
+thrift_gen_mycpp_SOURCES = plugin/cpp_plugin.cc \
+                           plugin/t_cpp_generator.cc
+thrift_gen_mycpp_CPPFLAGS = $(AM_CPPFLAGS) -I$(top_srcdir)/compiler/cpp -I$(top_srcdir)/compiler/cpp/src/generate
+thrift_gen_mycpp_LDADD = $(top_builddir)/compiler/cpp/libthriftc.la
+
+cpp_plugin_test.sh: thrift-gen-mycpp
+TESTS = $(check_PROGRAMS) cpp_plugin_test.sh
+
+clean-local:
+	$(RM) -rf gen-cpp gen-mycpp
+
+endif