work

CMake_modules/FindASIO.cmake

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+#@PURPOSE: Provide access to Chris Kohlhoff's ASIO library.
+#
+#@TARGETS:
+#   ASIO::ASIO Chris Kohlhoff's ASIO library
+#
+#@DESCRIPTION: This module produces a single target 'ASIO::ASIO', that can be
+# used to link to the asio library. The behavior of this module is undefined
+# unless the asio library is in '../../asio' relative to this file.
+#
+# The 'asio' target generated by this module uses the "standalone" version of
+# asio in that it doesn't depend on any Boost libraries.
+
+set(ASIO_FOUND FALSE)
+
+if(TARGET ASIO::ASIO)
+  set(ASIO_FOUND TRUE)
+else()
+  find_package(Threads QUIET)
+  if(NOT Threads_FOUND)
+    if(ASIO_FIND_REQUIRED)
+      message(FATAL_ERROR "ASIO requires thread support, but it wasn't found.")
+    else()
+      if(ASIO_FIND_QUIETLY)
+        message(STATUS "ASIO requires thread support, but it wasn't found.")
+      endif()
+    endif()
+  else()
+    find_path(ASIO_ROOT include/asio.hpp
+      PATHS
+        # Where asio lives relative to it's official repository
+        ${CMAKE_CURRENT_LIST_DIR}/../../asio/asio
+
+        # Where asio should live
+        ${CMAKE_CURRENT_LIST_DIR}/../../asio
+    )
+    if(NOT ASIO_ROOT)
+      if(ASIO_FIND_REQUIRED)
+        message(FATAL_ERROR "ASIO headers could not be found.")
+      else()
+        if(ASIO_FIND_QUIETLY)
+          message(STATUS "ASIO headers could not be found.")
+        endif()
+      endif()
+    else()
+      add_library(ASIO::ASIO INTERFACE IMPORTED GLOBAL)
+      set_target_properties(ASIO::ASIO PROPERTIES
+        INTERFACE_COMPILE_DEFINITIONS "ASIO_STANDALONE"
+        INTERFACE_INCLUDE_DIRECTORIES "${ASIO_ROOT}/include"
+      )
+      target_link_libraries(ASIO::ASIO INTERFACE Threads::Threads)
+      set(ASIO_FOUND TRUE)
+    endif()
+  endif()
+endif()
+
+# ----------------------------------------------------------------------------
+# Copyright 2017 Bloomberg Finance L.P.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+