Add CMake Project

Now implemented:
- standalote installation as asio package;
- optional building and installation cpp11 and cpp14 examples.

Author: podsvirov

asio/CMakeLists.txt

@@ -0,0 +1,31 @@
+# Minimum supported CMake version
+cmake_minimum_required(VERSION 3.1 FATAL_ERROR)
+
+# Project
+project(asio
+  VERSION 1.11.0
+  LANGUAGES CXX)
+
+# Options
+set(asio_BUILD_EXAMPLES OFF CACHE BOOL "Build asio examples")
+
+# Installation configuration
+include(GNUInstallDirs)
+if(NOT DEFINED CMAKE_INSTALL_CMAKEDIR)
+  set(CMAKE_INSTALL_CMAKEDIR ${CMAKE_INSTALL_LIBDIR}/asio)
+endif()
+
+# Interface library
+add_subdirectory(include)
+
+# Sources
+add_subdirectory(src)
+
+# Installation
+configure_file(asio-config-version.cmake.in asio-config-version.cmake @ONLY)
+install(FILES ${CMAKE_CURRENT_BINARY_DIR}/asio-config-version.cmake
+  DESTINATION ${CMAKE_INSTALL_CMAKEDIR})
+install(EXPORT asio-targets
+  DESTINATION ${CMAKE_INSTALL_CMAKEDIR}
+  NAMESPACE asio::)
+install(FILES asio-config.cmake DESTINATION ${CMAKE_INSTALL_CMAKEDIR})

asio/asio-config-version.cmake.in

@@ -0,0 +1,11 @@
+set(PACKAGE_VERSION "@asio_VERSION@")
+
+# Check whether the requested PACKAGE_FIND_VERSION is compatible
+if("${PACKAGE_VERSION}" VERSION_LESS "${PACKAGE_FIND_VERSION}")
+    set(PACKAGE_VERSION_COMPATIBLE FALSE)
+else()
+    set(PACKAGE_VERSION_COMPATIBLE TRUE)
+    if ("${PACKAGE_VERSION}" VERSION_EQUAL "${PACKAGE_FIND_VERSION}")
+        set(PACKAGE_VERSION_EXACT TRUE)
+    endif()
+endif()

asio/asio-config.cmake

@@ -0,0 +1 @@
+include(${CMAKE_CURRENT_LIST_DIR}/asio-targets.cmake)