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ebc0a37760
The stdlib needs to build in Swift-5 mode, and ensure that `-swift-verion 5` be included in the commandline explicitly. While the compiler defaults to 5 mode, if it's not included explicitly, it won't be included in the swift interface, which then means that modules that import it will influence how the textual interface is processed. The interface for the stdlib must be processed in the Swift 5 language mode due to sendability. Set it explicitly to ensure that importing modules do not change the Swift language mode. Fixes: rdar://145118843
55 lines
1.8 KiB
CMake
55 lines
1.8 KiB
CMake
include(CheckSourceCompiles)
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include(CheckCompilerFlag)
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# Use Swift 5 mode
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set(CMAKE_Swift_LANGUAGE_VERSION 5)
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# Use C++17
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set(SwiftCore_MIN_CXX_STANDARD 17)
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# Unset CMAKE_CXX_STANDARD if it's too low and in the CMakeCache.txt
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if($CACHE{CMAKE_CXX_STANDARD} AND $CACHE{CMAKE_CXX_STANDARD} LESS ${SwiftCore_MIN_CXX_STANDARD})
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message(WARNING "Resetting cache value for CMAKE_CXX_STANDARD to ${SwiftCore_MIN_CXX_STANDARD}")
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unset(CMAKE_CXX_STANDARD CACHE)
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endif()
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# Allow manually specified CMAKE_CXX_STANDARD if it's greater than the minimum
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# required C++ version
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if(DEFINED CMAKE_CXX_STANDARD AND CMAKE_CXX_STANDARD LESS ${SwiftCore_MIN_CXX_STANDARD})
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message(FATAL_ERROR "Requested CMAKE_CXX_STANDARD=${CMAKE_CXX_STANDARD} which is less than the minimum C++ standard ${SwiftCore_MIN_CXX_STANDARD}")
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endif()
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set(CMAKE_CXX_STANDARD ${SwiftCore_MIN_CXX_STANDARD} CACHE STRING "C++ standard to conform to")
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set(CMAKE_CXX_STANDARD_REQUIRED YES)
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set(CMAKE_CXX_EXTENSIONS NO)
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check_source_compiles(CXX
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"#if !(__has_attribute(swiftcall) && \
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__has_attribute(swift_context) && \
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__has_attribute(swift_error_result) && \
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__has_attribute(swift_indirect_result))
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#error CXX compiler must support Swift calling conventions
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#endif
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int main(void) { return 0; }"
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HAVE_SWIFTCALL)
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if(NOT HAVE_SWIFTCALL)
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message(SEND_ERROR "CXX Compiler must support Swift calling conventions")
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endif()
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check_source_compiles(CXX
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"#if !(__has_attribute(swiftasynccall) && \
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__has_attribute(swift_async_context))
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#error CXX compiler must support Swift async calling conventions
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#endif
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int main(void) { return 0; }"
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HAVE_SWIFT_ASYNC_CALL)
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if(NOT HAVE_SWIFT_ASYNC_CALL)
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message(SEND_ERROR "CXX Compiler must support Swift async calling conventions")
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endif()
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check_compiler_flag(CXX "-mcx16" HAVE_CXX_MCX16)
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if(HAVE_CXX_MCX16)
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add_compile_options($<$<COMPILE_LANGUAGE:CXX>:-mcx16>)
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endif()
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