45 lines
1.4 KiB
CMake
45 lines
1.4 KiB
CMake
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function(check_builtin_exist SYMBOL VARIABLE)
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set(
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SOURCE_FILE
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"${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/CheckBuiltinExists.c"
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)
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set(
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CMAKE_CONFIGURABLE_FILE_CONTENT
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"int main(int argc, char** argv) { (void)argv; return ${SYMBOL}(argc); }\n"
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)
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configure_file(
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"${CMAKE_ROOT}/Modules/CMakeConfigurableFile.in"
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"${SOURCE_FILE}"
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@ONLY
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)
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if(NOT CMAKE_REQUIRED_QUIET)
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message(STATUS "Looking for ${SYMBOL}")
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endif()
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try_compile(${VARIABLE}
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${CMAKE_BINARY_DIR}
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${SOURCE_FILE}
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OUTPUT_VARIABLE OUTPUT
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)
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if(${VARIABLE})
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if(NOT CMAKE_REQUIRED_QUIET)
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message(STATUS "Looking for ${SYMBOL} - found")
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endif()
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set(${VARIABLE} 1 CACHE INTERNAL "Have symbol ${SYMBOL}" PARENT_SCOPE)
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file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log
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"Determining if the ${SYMBOL} "
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"exist passed with the following output:\n"
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"${OUTPUT}\nFile ${SOURCEFILE}:\n"
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"${CMAKE_CONFIGURABLE_FILE_CONTENT}\n")
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else()
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if(NOT CMAKE_REQUIRED_QUIET)
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message(STATUS "Looking for ${SYMBOL} - not found")
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endif()
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set(${VARIABLE} "" CACHE INTERNAL "Have symbol ${SYMBOL}" PARENT_SCOPE)
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file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log
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"Determining if the ${SYMBOL} "
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"exist failed with the following output:\n"
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"${OUTPUT}\nFile ${SOURCEFILE}:\n"
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"${CMAKE_CONFIGURABLE_FILE_CONTENT}\n")
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endif()
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endfunction()
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