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Add Basic Checks For Clang Compiler
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CMakeLists.txt
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CMakeLists.txt
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set(CMAKE_INSTALL_DEFAULT_COMPONENT_NAME "core")
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set(CMAKE_MODULE_PATH "${CMAKE_SOURCE_DIR}/cmake")
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include(clang_version_check)
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include(InstallSymlink)
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include(MacroEnsureOutOfSourceBuild)
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include(dsym)
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include(xcproj)
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include(architecture)
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include(create_symlink)
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set(CLANG_RECOMMENDED_MINIMUM_VERSION 11)
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clang_version_check(${CMAKE_C_COMPILER} c ${CLANG_RECOMMENDED_MINIMUM_VERSION})
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clang_version_check(${CMAKE_CXX_COMPILER} cpp ${CLANG_RECOMMENDED_MINIMUM_VERSION})
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MACRO_ENSURE_OUT_OF_SOURCE_BUILD()
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cmake/clang_version_check.cmake
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cmake/clang_version_check.cmake
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set(MANUALLY_SET_COMPILER_ERROR_MESSAGE
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"If you already have a supported version of clang installed, you may need to \
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manually set CMAKE_C_COMPILER and CMAKE_CXX_COMPILER. Refer to the Darling docs \
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for more details."
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)
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macro(clang_version_check compiler source_type clang_minimum_version)
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if (compiler STREQUAL "")
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message(FATAL_ERROR "Unable to find a compatible compiler")
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endif (compiler STREQUAL "")
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file(WRITE "${CMAKE_BINARY_DIR}/clang_major.${source_type}" "#include <stdio.h>\n"
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"#if !__clang__\n" "#error \"Not running on a clang compiler!\"\n" "#endif\n" "int main() { printf(\"%d\", __clang_major__); }")
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execute_process(COMMAND "${compiler}" "${CMAKE_BINARY_DIR}/clang_major.${source_type}" "-o" "clang_${source_type}_major"
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RESULT_VARIABLE BUILD_CLANG_TEST_RESULT
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OUTPUT_VARIABLE BUILD_CLANG_TEST_OUTPUT
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COMMAND_ECHO NONE
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)
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if (BUILD_CLANG_TEST_RESULT)
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message(FATAL_ERROR
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"Failed to build ${CMAKE_BINARY_DIR}/clang_major.${source_type}\n"
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"This could indicate that `${compiler}` is either not a clang compiler, "
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"or the path does not exist. ${MANUALLY_SET_COMPILER_ERROR_MESSAGE}")
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endif (BUILD_CLANG_TEST_RESULT)
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execute_process(COMMAND "${CMAKE_BINARY_DIR}/clang_${source_type}_major"
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RESULT_VARIABLE CLANG_MAJOR_VERSION_RESULT
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OUTPUT_VARIABLE CLANG_MAJOR_VERSION_OUTPUT
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)
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if (CLANG_MAJOR_VERSION_RESULT)
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# This should normally never fail...
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message(FATAL_ERROR "Failed to check clang major version")
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endif (CLANG_MAJOR_VERSION_RESULT)
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if ("${CLANG_MAJOR_VERSION_OUTPUT}" LESS ${clang_minimum_version})
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message(FATAL_ERROR
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"Your clang version (${CLANG_MAJOR_VERSION_OUTPUT}) is below the recommend supported version (${clang_minimum_version})\n"
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"${MANUALLY_SET_COMPILER_ERROR_MESSAGE}")
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endif ("${CLANG_MAJOR_VERSION_OUTPUT}" LESS ${clang_minimum_version})
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endmacro()