[CMake] Add self-test for cmake script

.travis.yml

@@ -24,6 +24,20 @@ matrix:
     - env: BOGUS_JOB=true
 
   include:
+
+      # cmake self-test
+    - os: linux
+      env: TEST_CMAKE=TRUE #Only for easier identification in travis web gui
+      install:
+        - git clone --depth 1 https://github.com/boostorg/config.git ../config
+        - git clone --depth 1 https://github.com/boostorg/core.git ../core
+        - git clone --depth 1 https://github.com/boostorg/assert.git ../assert
+
+      script:
+        - mkdir __build__ && cd __build__
+        - cmake ../test/test_cmake
+        - cmake --build .
+
     - os: linux
       compiler: g++
       env: TOOLSET=gcc COMPILER=g++ CXXSTD=03,11

test/test_cmake/CMakeLists.txt

@@ -0,0 +1,20 @@
+# Copyright 2018 Mike Dev
+# Distributed under the Boost Software License, Version 1.0.
+# See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt
+#
+# NOTE: This does NOT run the unit tests for Boost.Bind.
+#       It only tests, if the CMakeLists.txt file in it's root works as expected
+
+cmake_minimum_required( VERSION 3.5 )
+
+project( BoostBindCMakeSelfTest )
+
+add_subdirectory( ../../../config ${CMAKE_CURRENT_BINARY_DIR}/libs/config )
+add_subdirectory( ../../../core ${CMAKE_CURRENT_BINARY_DIR}/libs/core )
+add_subdirectory( ../../../assert ${CMAKE_CURRENT_BINARY_DIR}/libs/assert )
+
+add_subdirectory( ../.. ${CMAKE_CURRENT_BINARY_DIR}/libs/boost_bind )
+
+add_executable( boost_bind_cmake_self_test main.cpp )
+target_link_libraries( boost_bind_cmake_self_test Boost::bind )
+

test/test_cmake/main.cpp

@@ -0,0 +1,5 @@
+#include <boost/bind.hpp>
+
+int main() {
+
+}