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# - Check if the given C++ source code compiles and runs.
# CHECK_CXX_SOURCE_RUNS(<code> <var>)
# <code> - source code to try to compile
# <var> - variable to store the result
# (1 for success, empty for failure)
# The following variables may be set before calling this macro to
# modify the way the check is run:
#
# CMAKE_REQUIRED_FLAGS = string of compile command line flags
# CMAKE_REQUIRED_DEFINITIONS = list of macros to define (-DFOO=bar)
# CMAKE_REQUIRED_INCLUDES = list of include directories
# CMAKE_REQUIRED_LIBRARIES = list of libraries to link
#=============================================================================
# Copyright 2006-2009 Kitware, Inc.
#
# Distributed under the OSI-approved BSD License (the "License");
# see accompanying file Copyright.txt for details.
#
# This software is distributed WITHOUT ANY WARRANTY; without even the
# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
# See the License for more information.
#=============================================================================
# (To distribute this file outside of CMake, substitute the full
# License text for the above reference.)
include("${CMAKE_CURRENT_LIST_DIR}/CMakeExpandImportedTargets.cmake")
macro(CHECK_CXX_SOURCE_RUNS SOURCE VAR)
if("${VAR}" MATCHES "^${VAR}$")
set(MACRO_CHECK_FUNCTION_DEFINITIONS
"-D${VAR} ${CMAKE_REQUIRED_FLAGS}")
if(CMAKE_REQUIRED_LIBRARIES)
# this one translates potentially used imported library targets to their files on disk
CMAKE_EXPAND_IMPORTED_TARGETS(_ADJUSTED_CMAKE_REQUIRED_LIBRARIES LIBRARIES ${CMAKE_REQUIRED_LIBRARIES} CONFIGURATION "${CMAKE_TRY_COMPILE_CONFIGURATION}")
set(CHECK_CXX_SOURCE_COMPILES_ADD_LIBRARIES
"-DLINK_LIBRARIES:STRING=${_ADJUSTED_CMAKE_REQUIRED_LIBRARIES}")
else(CMAKE_REQUIRED_LIBRARIES)
set(CHECK_CXX_SOURCE_COMPILES_ADD_LIBRARIES)
endif(CMAKE_REQUIRED_LIBRARIES)
if(CMAKE_REQUIRED_INCLUDES)
set(CHECK_CXX_SOURCE_COMPILES_ADD_INCLUDES
"-DINCLUDE_DIRECTORIES:STRING=${CMAKE_REQUIRED_INCLUDES}")
else(CMAKE_REQUIRED_INCLUDES)
set(CHECK_CXX_SOURCE_COMPILES_ADD_INCLUDES)
endif(CMAKE_REQUIRED_INCLUDES)
file(WRITE "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/src.cxx"
"${SOURCE}\n")
message(STATUS "Performing Test ${VAR}")
try_run(${VAR}_EXITCODE ${VAR}_COMPILED
${CMAKE_BINARY_DIR}
${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/src.cxx
COMPILE_DEFINITIONS ${CMAKE_REQUIRED_DEFINITIONS}
CMAKE_FLAGS -DCOMPILE_DEFINITIONS:STRING=${MACRO_CHECK_FUNCTION_DEFINITIONS}
-DCMAKE_SKIP_RPATH:BOOL=${CMAKE_SKIP_RPATH}
"${CHECK_CXX_SOURCE_COMPILES_ADD_LIBRARIES}"
"${CHECK_CXX_SOURCE_COMPILES_ADD_INCLUDES}"
COMPILE_OUTPUT_VARIABLE OUTPUT)
# if it did not compile make the return value fail code of 1
if(NOT ${VAR}_COMPILED)
set(${VAR}_EXITCODE 1)
endif(NOT ${VAR}_COMPILED)
# if the return value was 0 then it worked
if("${${VAR}_EXITCODE}" EQUAL 0)
set(${VAR} 1 CACHE INTERNAL "Test ${VAR}")
message(STATUS "Performing Test ${VAR} - Success")
file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log
"Performing C++ SOURCE FILE Test ${VAR} succeded with the following output:\n"
"${OUTPUT}\n"
"Return value: ${${VAR}}\n"
"Source file was:\n${SOURCE}\n")
else("${${VAR}_EXITCODE}" EQUAL 0)
if(CMAKE_CROSSCOMPILING AND "${${VAR}_EXITCODE}" MATCHES "FAILED_TO_RUN")
set(${VAR} "${${VAR}_EXITCODE}")
else(CMAKE_CROSSCOMPILING AND "${${VAR}_EXITCODE}" MATCHES "FAILED_TO_RUN")
set(${VAR} "" CACHE INTERNAL "Test ${VAR}")
endif(CMAKE_CROSSCOMPILING AND "${${VAR}_EXITCODE}" MATCHES "FAILED_TO_RUN")
message(STATUS "Performing Test ${VAR} - Failed")
file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log
"Performing C++ SOURCE FILE Test ${VAR} failed with the following output:\n"
"${OUTPUT}\n"
"Return value: ${${VAR}_EXITCODE}\n"
"Source file was:\n${SOURCE}\n")
endif("${${VAR}_EXITCODE}" EQUAL 0)
endif("${VAR}" MATCHES "^${VAR}$")
endmacro(CHECK_CXX_SOURCE_RUNS)
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