fixes nanomsg#975 Add CMakeLists for demos

demo/CMakeLists.txt

@@ -0,0 +1,29 @@
+#
+# Demonstration CMakeLists.txt for nanomsg demos.
+#
+# This file shows how one might use nanomsg from a another project
+# that is also CMake-driven.
+#
+# Thanks for the idea goes to @maddouri.
+#
+cmake_minimum_required (VERSION 2.8.7)
+
+project(nanomsg-demo)
+
+# Call this from your own project's makefile.
+find_package(nanomsg CONFIG REQUIRED)
+
+add_executable(async_demo async_demo.c)
+target_link_libraries(async_demo nanomsg)
+
+add_executable(device_demo device_demo.c)
+target_link_libraries(device_demo nanomsg)
+
+add_executable(pthread_demo pthread_demo.c)
+target_link_libraries(pthread_demo nanomsg)
+
+add_executable(pubsub_demo pubsub_demo.c)
+target_link_libraries(pubsub_demo nanomsg)
+
+add_executable(rpc_demo rpc_demo.c)
+target_link_libraries(rpc_demo nanomsg)

demo/README

@@ -3,3 +3,6 @@ The intention is that you can use these programs (or parts thereof) in
 your own code.
 
 We welcome further contributions here.
+
+These have their own CMake driven configuration if you want to build them
+all.  They are not built automatically.