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66 lines
2.9 KiB
CMake
66 lines
2.9 KiB
CMake
enable_language(Swift)
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if (CMAKE_Swift_COMPILER_VERSION VERSION_LESS 6.0)
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message(FATAL_ERROR
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"Swift 6.0 or newer is required to parse C++ headers in C++23 mode"
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)
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endif()
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# FIXME: How to verify this on non-Apple?
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if (APPLE AND NOT CMAKE_CXX_COMPILER_ID STREQUAL "AppleClang")
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message(FATAL_ERROR
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"Swift files must use Clang that was bundled with swiftc"
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)
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endif()
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include(${CMAKE_CURRENT_LIST_DIR}/InitializeSwift.cmake)
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include(${CMAKE_CURRENT_LIST_DIR}/GenerateSwiftHeader.cmake)
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# FIXME: https://gitlab.kitware.com/cmake/cmake/-/issues/26174
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if (APPLE)
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set(CMAKE_Swift_COMPILER_TARGET "${SWIFT_TARGET_TRIPLE}")
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endif()
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add_compile_options("SHELL:$<$<COMPILE_LANGUAGE:Swift>:-enable-experimental-feature Extern>")
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set(VFS_OVERLAY_DIRECTORY "${CMAKE_BINARY_DIR}/vfs_overlays" CACHE PATH "Directory to put VFS overlays in")
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# FIXME: https://gitlab.kitware.com/cmake/cmake/-/issues/26195
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# For now, we'll just manually massage the flags.
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function(swizzle_target_properties_for_swift target_name)
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get_property(compile_options TARGET ${target_name} PROPERTY INTERFACE_COMPILE_OPTIONS)
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set(munged_properties "")
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foreach(property IN LISTS compile_options)
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set(cxx_property "$<$<COMPILE_LANGUAGE:C,CXX,ASM>:${property}>")
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set(swift_property "SHELL:$<$<COMPILE_LANGUAGE:Swift>:-Xcc ${property}>")
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list(APPEND munged_properties "${cxx_property}" "${swift_property}")
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endforeach()
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set_property(TARGET ${target_name} PROPERTY INTERFACE_COMPILE_OPTIONS ${munged_properties})
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endfunction()
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function(add_swift_target_properties target_name)
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cmake_parse_arguments(PARSE_ARGV 1 SWIFT_TARGET "" "" "LAGOM_LIBRARIES")
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target_compile_features(${target_name} PUBLIC cxx_std_${CMAKE_CXX_STANDARD})
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target_compile_options(${target_name} PUBLIC "SHELL:$<$<COMPILE_LANGUAGE:Swift>:-Xcc -std=c++23 -cxx-interoperability-mode=default>")
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string(REPLACE "Lib" "" module_name ${target_name})
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string(TOUPPER ${target_name} TARGET_NAME_UPPER)
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target_compile_definitions(${target_name} PRIVATE "${TARGET_NAME_UPPER}_USE_SWIFT")
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set_target_properties(${target_name} PROPERTIES Swift_MODULE_NAME ${module_name})
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# FIXME: These should be pulled automatically from interface compile options for the target
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set(VFS_OVERLAY_OPTIONS "-Xcc" "-ivfsoverlay${VFS_OVERLAY_DIRECTORY}/${target_name}_vfs_overlay.yaml")
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foreach(internal_library IN LISTS SWIFT_TARGET_LAGOM_LIBRARIES)
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list(APPEND VFS_OVERLAY_OPTIONS "-Xcc" "-ivfsoverlay${VFS_OVERLAY_DIRECTORY}/${internal_library}_vfs_overlay.yaml")
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endforeach()
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get_target_property(_NATIVE_DIRS ${target_name} INCLUDE_DIRECTORIES)
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list(APPEND _NATIVE_DIRS ${CMAKE_Swift_MODULE_DIRECTORY})
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_swift_generate_cxx_header(${target_name} "${target_name}-Swift.h"
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SEARCH_PATHS ${_NATIVE_DIRS}
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COMPILE_OPTIONS ${VFS_OVERLAY_OPTIONS}
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)
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endfunction()
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