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- # Distributed under the OSI-approved BSD 3-Clause License. See accompanying
- # file Copyright.txt or https://cmake.org/licensing for details.
- if(CMAKE_CXX_COMPILER_FORCED)
- # The compiler configuration was forced by the user.
- # Assume the user has configured all compiler information.
- set(CMAKE_CXX_COMPILER_WORKS TRUE)
- return()
- endif()
- include(CMakeTestCompilerCommon)
- # work around enforced code signing and / or missing exectuable target type
- set(__CMAKE_SAVED_TRY_COMPILE_TARGET_TYPE ${CMAKE_TRY_COMPILE_TARGET_TYPE})
- if(_CMAKE_FEATURE_DETECTION_TARGET_TYPE)
- set(CMAKE_TRY_COMPILE_TARGET_TYPE ${_CMAKE_FEATURE_DETECTION_TARGET_TYPE})
- endif()
- # Remove any cached result from an older CMake version.
- # We now store this in CMakeCXXCompiler.cmake.
- unset(CMAKE_CXX_COMPILER_WORKS CACHE)
- # This file is used by EnableLanguage in cmGlobalGenerator to
- # determine that the selected C++ compiler can actually compile
- # and link the most basic of programs. If not, a fatal error
- # is set and cmake stops processing commands and will not generate
- # any makefiles or projects.
- if(NOT CMAKE_CXX_COMPILER_WORKS)
- PrintTestCompilerStatus("CXX" "")
- __TestCompiler_setTryCompileTargetType()
- file(WRITE ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/testCXXCompiler.cxx
- "#ifndef __cplusplus\n"
- "# error \"The CMAKE_CXX_COMPILER is set to a C compiler\"\n"
- "#endif\n"
- "int main(){return 0;}\n")
- try_compile(CMAKE_CXX_COMPILER_WORKS ${CMAKE_BINARY_DIR}
- ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/testCXXCompiler.cxx
- OUTPUT_VARIABLE __CMAKE_CXX_COMPILER_OUTPUT)
- # Move result from cache to normal variable.
- set(CMAKE_CXX_COMPILER_WORKS ${CMAKE_CXX_COMPILER_WORKS})
- unset(CMAKE_CXX_COMPILER_WORKS CACHE)
- set(CXX_TEST_WAS_RUN 1)
- __TestCompiler_restoreTryCompileTargetType()
- endif()
- if(NOT CMAKE_CXX_COMPILER_WORKS)
- PrintTestCompilerStatus("CXX" " -- broken")
- file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log
- "Determining if the CXX compiler works failed with "
- "the following output:\n${__CMAKE_CXX_COMPILER_OUTPUT}\n\n")
- string(REPLACE "\n" "\n " _output "${__CMAKE_CXX_COMPILER_OUTPUT}")
- message(FATAL_ERROR "The C++ compiler\n \"${CMAKE_CXX_COMPILER}\"\n"
- "is not able to compile a simple test program.\nIt fails "
- "with the following output:\n ${_output}\n\n"
- "CMake will not be able to correctly generate this project.")
- else()
- if(CXX_TEST_WAS_RUN)
- PrintTestCompilerStatus("CXX" " -- works")
- file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log
- "Determining if the CXX compiler works passed with "
- "the following output:\n${__CMAKE_CXX_COMPILER_OUTPUT}\n\n")
- endif()
- # Try to identify the ABI and configure it into CMakeCXXCompiler.cmake
- include(${CMAKE_ROOT}/Modules/CMakeDetermineCompilerABI.cmake)
- CMAKE_DETERMINE_COMPILER_ABI(CXX ${CMAKE_ROOT}/Modules/CMakeCXXCompilerABI.cpp)
- # Try to identify the compiler features
- include(${CMAKE_ROOT}/Modules/CMakeDetermineCompileFeatures.cmake)
- CMAKE_DETERMINE_COMPILE_FEATURES(CXX)
- # Re-configure to save learned information.
- configure_file(
- ${CMAKE_ROOT}/Modules/CMakeCXXCompiler.cmake.in
- ${CMAKE_PLATFORM_INFO_DIR}/CMakeCXXCompiler.cmake
- @ONLY
- )
- include(${CMAKE_PLATFORM_INFO_DIR}/CMakeCXXCompiler.cmake)
- if(CMAKE_CXX_SIZEOF_DATA_PTR)
- foreach(f ${CMAKE_CXX_ABI_FILES})
- include(${f})
- endforeach()
- unset(CMAKE_CXX_ABI_FILES)
- endif()
- endif()
- set(CMAKE_TRY_COMPILE_TARGET_TYPE ${__CMAKE_SAVED_TRY_COMPILE_TARGET_TYPE})
- unset(__CMAKE_SAVED_TRY_COMPILE_TARGET_TYPE)
- unset(__CMAKE_CXX_COMPILER_OUTPUT)
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