# 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() | |