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93 lines
3.7 KiB
CMake
93 lines
3.7 KiB
CMake
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# Distributed under the OSI-approved BSD 3-Clause License. See accompanying
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# file Copyright.txt or https://cmake.org/licensing for details.
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if(CMAKE_OBJCXX_COMPILER_FORCED)
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# The compiler configuration was forced by the user.
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# Assume the user has configured all compiler information.
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set(CMAKE_OBJCXX_COMPILER_WORKS TRUE)
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return()
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endif()
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include(CMakeTestCompilerCommon)
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# work around enforced code signing and / or missing executable target type
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set(__CMAKE_SAVED_TRY_COMPILE_TARGET_TYPE ${CMAKE_TRY_COMPILE_TARGET_TYPE})
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if(_CMAKE_FEATURE_DETECTION_TARGET_TYPE)
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set(CMAKE_TRY_COMPILE_TARGET_TYPE ${_CMAKE_FEATURE_DETECTION_TARGET_TYPE})
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endif()
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# Remove any cached result from an older CMake version.
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# We now store this in CMakeOBJCXXCompiler.cmake.
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unset(CMAKE_OBJCXX_COMPILER_WORKS CACHE)
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# Try to identify the ABI and configure it into CMakeOBJCXXCompiler.cmake
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include(${CMAKE_ROOT}/Modules/CMakeDetermineCompilerABI.cmake)
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CMAKE_DETERMINE_COMPILER_ABI(OBJCXX ${CMAKE_ROOT}/Modules/CMakeOBJCXXCompilerABI.mm)
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if(CMAKE_OBJCXX_ABI_COMPILED)
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# The compiler worked so skip dedicated test below.
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set(CMAKE_OBJCXX_COMPILER_WORKS TRUE)
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message(STATUS "Check for working OBJCXX compiler: ${CMAKE_OBJCXX_COMPILER} - skipped")
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endif()
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# This file is used by EnableLanguage in cmGlobalGenerator to
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# determine that the selected Objective-C++ compiler can actually compile
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# and link the most basic of programs. If not, a fatal error
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# is set and cmake stops processing commands and will not generate
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# any makefiles or projects.
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if(NOT CMAKE_OBJCXX_COMPILER_WORKS)
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PrintTestCompilerStatus("OBJCXX")
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__TestCompiler_setTryCompileTargetType()
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string(CONCAT __TestCompiler_testObjCXXCompilerSource
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"#ifndef __cplusplus\n"
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"# error \"The CMAKE_OBJCXX_COMPILER is set to a C compiler\"\n"
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"#endif\n"
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"#ifndef __OBJC__\n"
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"# error \"The CMAKE_OBJCXX_COMPILER is not an Objective-C++ compiler\"\n"
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"#endif\n"
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"int main(){return 0;}\n")
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# Clear result from normal variable.
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unset(CMAKE_OBJCXX_COMPILER_WORKS)
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# Puts test result in cache variable.
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try_compile(CMAKE_OBJCXX_COMPILER_WORKS
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SOURCE_FROM_VAR testObjCXXCompiler.mm __TestCompiler_testObjCXXCompilerSource
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OUTPUT_VARIABLE __CMAKE_OBJCXX_COMPILER_OUTPUT)
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unset(__TestCompiler_testObjCXXCompilerSource)
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# Move result from cache to normal variable.
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set(CMAKE_OBJCXX_COMPILER_WORKS ${CMAKE_OBJCXX_COMPILER_WORKS})
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unset(CMAKE_OBJCXX_COMPILER_WORKS CACHE)
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__TestCompiler_restoreTryCompileTargetType()
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if(NOT CMAKE_OBJCXX_COMPILER_WORKS)
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PrintTestCompilerResult(CHECK_FAIL "broken")
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string(REPLACE "\n" "\n " _output "${__CMAKE_OBJCXX_COMPILER_OUTPUT}")
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message(FATAL_ERROR "The Objective-C++ compiler\n \"${CMAKE_OBJCXX_COMPILER}\"\n"
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"is not able to compile a simple test program.\nIt fails "
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"with the following output:\n ${_output}\n\n"
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"CMake will not be able to correctly generate this project.")
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endif()
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PrintTestCompilerResult(CHECK_PASS "works")
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endif()
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# Try to identify the compiler features
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include(${CMAKE_ROOT}/Modules/CMakeDetermineCompileFeatures.cmake)
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CMAKE_DETERMINE_COMPILE_FEATURES(OBJCXX)
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# Re-configure to save learned information.
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configure_file(
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${CMAKE_ROOT}/Modules/CMakeOBJCXXCompiler.cmake.in
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${CMAKE_PLATFORM_INFO_DIR}/CMakeOBJCXXCompiler.cmake
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@ONLY
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)
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include(${CMAKE_PLATFORM_INFO_DIR}/CMakeOBJCXXCompiler.cmake)
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if(CMAKE_OBJCXX_SIZEOF_DATA_PTR)
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foreach(f ${CMAKE_OBJCXX_ABI_FILES})
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include(${f})
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endforeach()
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unset(CMAKE_OBJCXX_ABI_FILES)
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endif()
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set(CMAKE_TRY_COMPILE_TARGET_TYPE ${__CMAKE_SAVED_TRY_COMPILE_TARGET_TYPE})
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unset(__CMAKE_SAVED_TRY_COMPILE_TARGET_TYPE)
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unset(__CMAKE_OBJCXX_COMPILER_OUTPUT)
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