| # Distributed under the OSI-approved BSD 3-Clause License. See accompanying |
| # file Copyright.txt or https://cmake.org/licensing for details. |
| |
| #.rst: |
| # CheckCXXSourceRuns |
| # ------------------ |
| # |
| # 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) |
| # Will be created as an internal cache variable. |
| # |
| # 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 |
| # CMAKE_REQUIRED_QUIET = execute quietly without messages |
| |
| macro(CHECK_CXX_SOURCE_RUNS SOURCE VAR) |
| if(NOT DEFINED "${VAR}") |
| set(MACRO_CHECK_FUNCTION_DEFINITIONS |
| "-D${VAR} ${CMAKE_REQUIRED_FLAGS}") |
| if(CMAKE_REQUIRED_LIBRARIES) |
| set(CHECK_CXX_SOURCE_COMPILES_ADD_LIBRARIES |
| LINK_LIBRARIES ${CMAKE_REQUIRED_LIBRARIES}) |
| else() |
| set(CHECK_CXX_SOURCE_COMPILES_ADD_LIBRARIES) |
| endif() |
| if(CMAKE_REQUIRED_INCLUDES) |
| set(CHECK_CXX_SOURCE_COMPILES_ADD_INCLUDES |
| "-DINCLUDE_DIRECTORIES:STRING=${CMAKE_REQUIRED_INCLUDES}") |
| else() |
| set(CHECK_CXX_SOURCE_COMPILES_ADD_INCLUDES) |
| endif() |
| file(WRITE "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/src.cxx" |
| "${SOURCE}\n") |
| |
| if(NOT CMAKE_REQUIRED_QUIET) |
| message(STATUS "Performing Test ${VAR}") |
| endif() |
| try_run(${VAR}_EXITCODE ${VAR}_COMPILED |
| ${CMAKE_BINARY_DIR} |
| ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/src.cxx |
| COMPILE_DEFINITIONS ${CMAKE_REQUIRED_DEFINITIONS} |
| ${CHECK_CXX_SOURCE_COMPILES_ADD_LIBRARIES} |
| CMAKE_FLAGS -DCOMPILE_DEFINITIONS:STRING=${MACRO_CHECK_FUNCTION_DEFINITIONS} |
| -DCMAKE_SKIP_RPATH:BOOL=${CMAKE_SKIP_RPATH} |
| "${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() |
| # if the return value was 0 then it worked |
| if("${${VAR}_EXITCODE}" EQUAL 0) |
| set(${VAR} 1 CACHE INTERNAL "Test ${VAR}") |
| if(NOT CMAKE_REQUIRED_QUIET) |
| message(STATUS "Performing Test ${VAR} - Success") |
| endif() |
| file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log |
| "Performing C++ SOURCE FILE Test ${VAR} succeeded with the following output:\n" |
| "${OUTPUT}\n" |
| "Return value: ${${VAR}}\n" |
| "Source file was:\n${SOURCE}\n") |
| else() |
| if(CMAKE_CROSSCOMPILING AND "${${VAR}_EXITCODE}" MATCHES "FAILED_TO_RUN") |
| set(${VAR} "${${VAR}_EXITCODE}") |
| else() |
| set(${VAR} "" CACHE INTERNAL "Test ${VAR}") |
| endif() |
| |
| if(NOT CMAKE_REQUIRED_QUIET) |
| message(STATUS "Performing Test ${VAR} - Failed") |
| endif() |
| 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() |
| endif() |
| endmacro() |
| |