FairMQ/cmake/Findasio.cmake
Dennis Klein 170557ace9 build: Revert removal of asio find module
Explicitely prefer config mode search over find module for asio.
2021-07-16 18:10:59 +02:00

47 lines
1.7 KiB
CMake

################################################################################
# Copyright (C) 2019-2021 GSI Helmholtzzentrum fuer Schwerionenforschung GmbH #
# #
# This software is distributed under the terms of the #
# GNU Lesser General Public Licence (LGPL) version 3, #
# copied verbatim in the file "LICENSE" #
################################################################################
find_path(asio_INCLUDE_DIR
NAMES asio.hpp
PATH_SUFFIXES include
)
if(asio_INCLUDE_DIR)
find_file(asio_VERSION_HEADER "asio/version.hpp"
${asio_INCLUDE_DIR}
NO_DEFAULT_PATH
)
endif()
if(asio_VERSION_HEADER)
file(READ "${asio_VERSION_HEADER}" _asio_VERSION_HEADER_CONTENT)
string(REGEX MATCH "#define ASIO_VERSION ([0-9]+)" _MATCH "${_asio_VERSION_HEADER_CONTENT}")
set(asio_VERSION_MACRO ${CMAKE_MATCH_1})
math(EXPR asio_VERSION_MAJOR "${asio_VERSION_MACRO} / 100000")
math(EXPR asio_VERSION_MINOR "${asio_VERSION_MACRO} / 100 % 1000")
math(EXPR asio_VERSION_PATCH "${asio_VERSION_MACRO} % 100")
set(asio_VERSION "${asio_VERSION_MAJOR}.${asio_VERSION_MINOR}.${asio_VERSION_PATCH}")
endif()
include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(asio
REQUIRED_VARS asio_INCLUDE_DIR
VERSION_VAR asio_VERSION
HANDLE_COMPONENTS
)
if(asio_FOUND AND NOT TARGET asio::asio)
add_library(asio::asio INTERFACE IMPORTED)
set_target_properties(asio::asio PROPERTIES
INTERFACE_COMPILE_DEFINITIONS "ASIO_STANDALONE"
INTERFACE_INCLUDE_DIRECTORIES "${asio_INCLUDE_DIR}"
)
endif()