Add CMakeLists.txt, test/cmake_subdir_test

CMakeLists.txt

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+# Copyright 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
+
+# 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(BoostEndian LANGUAGES CXX)
+
+add_library(boost_endian INTERFACE)
+add_library(Boost::endian ALIAS boost_endian)
+
+target_include_directories(boost_endian INTERFACE include)
+
+target_link_libraries(boost_endian
+    INTERFACE
+        Boost::assert
+        Boost::config
+        Boost::core
+        Boost::predef
+        Boost::static_assert
+        Boost::type_traits
+        Boost::utility
+)

test/cmake_subdir_test/CMakeLists.txt

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+# 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/endian)
+
+# primary dependencies
+
+add_subdirectory(../../../assert boostorg/assert)
+add_subdirectory(../../../config boostorg/config)
+add_subdirectory(../../../core boostorg/core)
+add_subdirectory(../../../predef boostorg/predef)
+add_subdirectory(../../../static_assert boostorg/static_assert)
+add_subdirectory(../../../type_traits boostorg/type_traits)
+add_subdirectory(../../../utility boostorg/utility)
+
+# secondary dependencies
+
+add_subdirectory(../../../container_hash boostorg/container_hash)
+add_subdirectory(../../../preprocessor boostorg/preprocessor)
+add_subdirectory(../../../throw_exception boostorg/throw_exception)
+add_subdirectory(../../../detail boostorg/detail)
+add_subdirectory(../../../integer boostorg/integer)
+
+# --target check
+
+add_executable(quick ../quick.cpp)
+target_link_libraries(quick Boost::endian Boost::core)
+
+enable_testing()
+add_test(quick quick)
+
+add_custom_target(check COMMAND ${CMAKE_CTEST_COMMAND} --output-on-failure -C $<CONFIG>)