Merge branch 'feature/min_cmake' of https://github.com/Mike-Devel/bind into feature/pr-15

... to express their dependency on this library and retrieve any
configuration information such as the include directory, binary
to link to (if any), transitive dependencies, necessary compiler
options or the required c++ standards level.

.travis.yml

@@ -1,4 +1,4 @@
-# Copyright 2016-2019 Peter Dimov
+# Copyright 2016, 2017 Peter Dimov
 # Distributed under the Boost Software License, Version 1.0.
 # (See accompanying file LICENSE_1_0.txt or copy at http://boost.org/LICENSE_1_0.txt)
 
@@ -22,6 +22,20 @@ 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
@@ -250,15 +264,6 @@ matrix:
       compiler: clang++
       env: TOOLSET=clang COMPILER=clang++ CXXSTD=03,11,14,1z
 
-    - os: linux
-      compiler: g++
-      env: CMAKE_SUBDIR_TEST=1
-      script:
-      - cd libs/bind/test/cmake_subdir_test && mkdir __build__ && cd __build__
-      - cmake ..
-      - cmake --build .
-      - cmake --build . --target check
-
 install:
   - BOOST_BRANCH=develop && [ "$TRAVIS_BRANCH" == "master" ] && BOOST_BRANCH=master || true
   - cd ..

CMakeLists.txt

@@ -1,9 +1,9 @@
 # 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
-
-# Partial (add_subdirectory only) and experimental CMake support
-# Subject to change; please do not rely on the contents of this file yet
+#
+# NOTE: CMake support for Boost.Bind is currently experimental at best
+#       and the interface is likely to change in the future
 
 cmake_minimum_required(VERSION 3.5)
 project(BoostBind LANGUAGES CXX)

test/cmake_subdir_test/CMakeLists.txt

@@ -1,20 +0,0 @@
-# Copyright 2018, 2019 Peter Dimov
-# 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
-
-cmake_minimum_required(VERSION 3.5)
-
-project(cmake_subdir_test LANGUAGES CXX)
-
-add_subdirectory(../.. boostorg/bind)
-add_subdirectory(../../../assert boostorg/assert)
-add_subdirectory(../../../config boostorg/config)
-add_subdirectory(../../../core boostorg/core)
-
-add_executable(quick ../quick.cpp)
-target_link_libraries(quick Boost::bind Boost::core)
-
-enable_testing()
-add_test(quick quick)
-
-add_custom_target(check COMMAND ${CMAKE_CTEST_COMMAND} --output-on-failure -C $<CONFIG>)

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() {
+
+}