Add cmake_install_test, cmake_subdir_test

test/cmake_install_test/CMakeLists.txt

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+# Copyright 2018-2021 Peter Dimov
+# Distributed under the Boost Software License, Version 1.0.
+# https://www.boost.org/LICENSE_1_0.txt
+
+cmake_minimum_required(VERSION 3.5...3.20)
+
+project(cmake_install_test LANGUAGES CXX)
+
+find_package(boost_cobalt REQUIRED)
+
+add_executable(main main.cpp)
+target_link_libraries(main Boost::cobalt)
+
+enable_testing()
+add_test(main main)

test/cmake_install_test/main.cpp

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+// Copyright (c) 2023 Klemens D. Morgenstern
+//
+// 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)
+
+#include <boost/cobalt/main.hpp>
+#include <boost/cobalt/op.hpp>
+#include <boost/asio/steady_timer.hpp>
+
+using namespace boost;
+
+// tag::timer_example[]
+cobalt::main co_main(int argc, char * argv[]) // <1>
+{
+  asio::steady_timer tim{co_await asio::this_coro::executor, // <2>
+                         std::chrono::milliseconds(std::stoi(argv[1]))}; // <3>
+  co_await tim.async_wait(cobalt::use_op); // <4>
+  co_return 0; // <5>
+}
+// end::timer_example[]

test/cmake_subdir_test/CMakeLists.txt

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+# Copyright 2018-2021 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...3.20)
+
+project(cmake_subdir_test LANGUAGES CXX)
+
+add_subdirectory(../.. boostorg/timer)
+
+set(deps
+
+  # Primary dependencies
+  config
+  io
+  predef
+)
+
+foreach(dep IN LISTS deps)
+
+  add_subdirectory(../../../${dep} boostorg/${dep})
+
+endforeach()
+
+add_executable(main main.cpp)
+target_link_libraries(main Boost::timer)
+
+enable_testing()
+add_test(main main)

test/cmake_subdir_test/main.cpp

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+// Copyright (c) 2023 Klemens D. Morgenstern
+//
+// 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)
+
+#include <boost/cobalt/main.hpp>
+#include <boost/cobalt/op.hpp>
+#include <boost/asio/steady_timer.hpp>
+
+using namespace boost;
+
+// tag::timer_example[]
+cobalt::main co_main(int argc, char * argv[]) // <1>
+{
+  asio::steady_timer tim{co_await asio::this_coro::executor, // <2>
+                         std::chrono::milliseconds(std::stoi(argv[1]))}; // <3>
+  co_await tim.async_wait(cobalt::use_op); // <4>
+  co_return 0; // <5>
+}
+// end::timer_example[]