Add CMakeLists.txt

.travis.yml

@@ -240,6 +240,15 @@ matrix:
       compiler: clang++
       env: TOOLSET=clang COMPILER=clang++ CXXSTD=11,14,1z
 
+    - os: linux
+      compiler: g++
+      env: CMAKE_SUBDIR_TEST=1
+      script:
+      - cd libs/variant2/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

@@ -0,0 +1,21 @@
+# Copyright 2018, 2019 Peter Dimov
+# Distributed under the Boost Software License, Version 1.0.
+# 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
+
+cmake_minimum_required(VERSION 3.5)
+
+project(BoostVariant2 LANGUAGES CXX)
+
+add_library(boost_variant2 INTERFACE)
+add_library(Boost::variant2 ALIAS boost_variant2)
+
+target_include_directories(boost_variant2 INTERFACE include)
+
+target_link_libraries(boost_variant2
+    INTERFACE
+        Boost::config
+        Boost::mp11
+)

test/cmake_subdir_test/CMakeLists.txt

@@ -0,0 +1,19 @@
+# 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/variant2)
+add_subdirectory(../../../config boostorg/config)
+add_subdirectory(../../../mp11 boostorg/mp11)
+
+add_executable(quick quick.cpp)
+target_link_libraries(quick Boost::variant2)
+
+enable_testing()
+add_test(quick quick)
+
+add_custom_target(check COMMAND ${CMAKE_CTEST_COMMAND} --output-on-failure -C $<CONFIG>)

test/cmake_subdir_test/quick.cpp

@@ -0,0 +1,15 @@
+
+// Copyright 2019 Peter Dimov.
+//
+// Distributed under the Boost Software License, Version 1.0.
+// http://www.boost.org/LICENSE_1_0.txt
+
+#include <boost/variant2/variant.hpp>
+
+using namespace boost::variant2;
+
+int main()
+{
+    variant<float, int> v( 2 );
+    return get<1>( v ) == 2;
+}