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62 lines
2.6 KiB
CMake
62 lines
2.6 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_Swift_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_Swift_COMPILER_WORKS TRUE)
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return()
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endif()
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include(CMakeTestCompilerCommon)
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# Remove any cached result from an older CMake version.
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# We now store this in CMakeSwiftCompiler.cmake.
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unset(CMAKE_Swift_COMPILER_WORKS CACHE)
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# This file is used by EnableLanguage in cmGlobalGenerator to
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# determine that the selected 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_Swift_COMPILER_WORKS)
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PrintTestCompilerStatus("Swift")
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# Clear result from normal variable.
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unset(CMAKE_Swift_COMPILER_WORKS)
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# Puts test result in cache variable.
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set(__CMAKE_Swift_TEST_SOURCE "print(\"CMake\")\n")
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try_compile(CMAKE_Swift_COMPILER_WORKS
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SOURCE_FROM_VAR main.swift __CMAKE_Swift_TEST_SOURCE
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OUTPUT_VARIABLE __CMAKE_Swift_COMPILER_OUTPUT)
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# Move result from cache to normal variable.
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set(CMAKE_Swift_COMPILER_WORKS ${CMAKE_Swift_COMPILER_WORKS})
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unset(CMAKE_Swift_COMPILER_WORKS CACHE)
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set(Swift_TEST_WAS_RUN 1)
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endif()
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if(NOT CMAKE_Swift_COMPILER_WORKS)
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PrintTestCompilerResult(CHECK_FAIL "broken")
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string(REPLACE "\n" "\n " _output "${__CMAKE_Swift_COMPILER_OUTPUT}")
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message(FATAL_ERROR "The Swift compiler\n \"${CMAKE_Swift_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 ${_output}\n\n"
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"CMake will not be able to correctly generate this project.")
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else()
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if(Swift_TEST_WAS_RUN)
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PrintTestCompilerResult(CHECK_PASS "works")
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endif()
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# Unlike C and CXX we do not yet detect any information about the Swift ABI.
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# However, one of the steps done for C and CXX as part of that detection is
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# to initialize the implicit include directories. That is relevant here.
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set(CMAKE_Swift_IMPLICIT_INCLUDE_DIRECTORIES "${_CMAKE_Swift_IMPLICIT_INCLUDE_DIRECTORIES_INIT}")
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# Re-configure to save learned information.
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configure_file(${CMAKE_ROOT}/Modules/CMakeSwiftCompiler.cmake.in
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${CMAKE_PLATFORM_INFO_DIR}/CMakeSwiftCompiler.cmake @ONLY)
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include(${CMAKE_PLATFORM_INFO_DIR}/CMakeSwiftCompiler.cmake)
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endif()
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unset(__CMAKE_Swift_TEST_SOURCE)
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unset(__CMAKE_Swift_COMPILER_OUTPUT)
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