From c07903706228a5cb212bede86915c083b41774c6 Mon Sep 17 00:00:00 2001 From: Alex Zenla Date: Sat, 3 Aug 2024 22:13:17 -0700 Subject: [PATCH] initial commit --- .gitignore | 6 + CMakeLists.txt | 11 ++ LICENSE | 201 +++++++++++++++++++++++++++ Sources/CMakeLists.txt | 2 + Sources/CppBackend/CMakeLists.txt | 4 + Sources/CppBackend/backend.cpp | 7 + Sources/CppBackend/backend.h | 3 + Sources/CppBackend/module.modulemap | 3 + Sources/SwiftFrontend/CMakeLists.txt | 2 + Sources/SwiftFrontend/main.swift | 4 + cmake/modules/AddSwift.cmake | 73 ++++++++++ cmake/modules/InitializeSwift.cmake | 89 ++++++++++++ 12 files changed, 405 insertions(+) create mode 100644 .gitignore create mode 100644 CMakeLists.txt create mode 100644 LICENSE create mode 100644 Sources/CMakeLists.txt create mode 100644 Sources/CppBackend/CMakeLists.txt create mode 100644 Sources/CppBackend/backend.cpp create mode 100644 Sources/CppBackend/backend.h create mode 100644 Sources/CppBackend/module.modulemap create mode 100644 Sources/SwiftFrontend/CMakeLists.txt create mode 100644 Sources/SwiftFrontend/main.swift create mode 100644 cmake/modules/AddSwift.cmake create mode 100644 cmake/modules/InitializeSwift.cmake diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..9104efe --- /dev/null +++ b/.gitignore @@ -0,0 +1,6 @@ +/build-* +/xcode-* +/.swiftpm +/.swift +/.vscode +/.idea diff --git a/CMakeLists.txt b/CMakeLists.txt new file mode 100644 index 0000000..0f37254 --- /dev/null +++ b/CMakeLists.txt @@ -0,0 +1,11 @@ +cmake_minimum_required(VERSION 3.24) +project(cxxswift LANGUAGES CXX Swift) + +set(CMAKE_CXX_STANDARD 20) + +list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake/modules") +include(InitializeSwift) +include(AddSwift) + +include_directories("${CMAKE_CURRENT_SOURCE_DIR}/Sources/CppBackend") +add_subdirectory(Sources) diff --git a/LICENSE b/LICENSE new file mode 100644 index 0000000..3523fe5 --- /dev/null +++ b/LICENSE @@ -0,0 +1,201 @@ + Apache License + Version 2.0, January 2004 + http://www.apache.org/licenses/ + + TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION + + 1. 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We also recommend that a + file or class name and description of purpose be included on the + same "printed page" as the copyright notice for easier + identification within third-party archives. + + Copyright 2024 Alex Zenla + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. diff --git a/Sources/CMakeLists.txt b/Sources/CMakeLists.txt new file mode 100644 index 0000000..5c44d74 --- /dev/null +++ b/Sources/CMakeLists.txt @@ -0,0 +1,2 @@ +add_subdirectory(SwiftFrontend) +add_subdirectory(CppBackend) diff --git a/Sources/CppBackend/CMakeLists.txt b/Sources/CppBackend/CMakeLists.txt new file mode 100644 index 0000000..6028792 --- /dev/null +++ b/Sources/CppBackend/CMakeLists.txt @@ -0,0 +1,4 @@ +add_library(CppBackend STATIC backend.h backend.cpp) + +set_target_properties(CppBackend PROPERTIES Swift_MODULE_NAME "CppBackend") +target_compile_options(CppBackend PUBLIC "$<$:-cxx-interoperability-mode=default>") diff --git a/Sources/CppBackend/backend.cpp b/Sources/CppBackend/backend.cpp new file mode 100644 index 0000000..1917ed3 --- /dev/null +++ b/Sources/CppBackend/backend.cpp @@ -0,0 +1,7 @@ +#include "backend.h" + +#include + +void backend_init() { + std::cout << "Hello World" << std::endl; +} diff --git a/Sources/CppBackend/backend.h b/Sources/CppBackend/backend.h new file mode 100644 index 0000000..592be9d --- /dev/null +++ b/Sources/CppBackend/backend.h @@ -0,0 +1,3 @@ +#pragma once + +void backend_init(); diff --git a/Sources/CppBackend/module.modulemap b/Sources/CppBackend/module.modulemap new file mode 100644 index 0000000..3b24d92 --- /dev/null +++ b/Sources/CppBackend/module.modulemap @@ -0,0 +1,3 @@ +module CppBackend { + header "backend.h" +} diff --git a/Sources/SwiftFrontend/CMakeLists.txt b/Sources/SwiftFrontend/CMakeLists.txt new file mode 100644 index 0000000..ebaff1b --- /dev/null +++ b/Sources/SwiftFrontend/CMakeLists.txt @@ -0,0 +1,2 @@ +add_executable(SwiftFrontend main.swift) +target_link_libraries(SwiftFrontend PRIVATE CppBackend) diff --git a/Sources/SwiftFrontend/main.swift b/Sources/SwiftFrontend/main.swift new file mode 100644 index 0000000..9d3c0b7 --- /dev/null +++ b/Sources/SwiftFrontend/main.swift @@ -0,0 +1,4 @@ +import CppBackend + +backend_init() +print("Hello World") diff --git a/cmake/modules/AddSwift.cmake b/cmake/modules/AddSwift.cmake new file mode 100644 index 0000000..38b20e8 --- /dev/null +++ b/cmake/modules/AddSwift.cmake @@ -0,0 +1,73 @@ +# This source file is part of the Swift open source project +# +# Copyright (c) 2023 Apple Inc. and the Swift project authors. +# Licensed under Apache License v2.0 with Runtime Library Exception +# +# See https://swift.org/LICENSE.txt for license information + + +# Generate the bridging header from Swift to C++ +# +# target: the name of the target to generate headers for. +# This target must build swift source files. +# header: the name of the header file to generate. +# +# NOTE: This logic will eventually be unstreamed into CMake. +function(_swift_generate_cxx_header target header) + if(NOT TARGET ${target}) + message(FATAL_ERROR "Target ${target} not defined.") + endif() + + if(NOT DEFINED CMAKE_Swift_COMPILER) + message(WARNING "Swift not enabled in project. Cannot generate headers for Swift files.") + return() + endif() + + cmake_parse_arguments(ARG "" "" "SEARCH_PATHS;MODULE_NAME" ${ARGN}) + + if(NOT ARG_MODULE_NAME) + set(target_module_name $) + set(ARG_MODULE_NAME $,${target_module_name},${target}>) + endif() + + if(ARG_SEARCH_PATHS) + list(TRANSFORM ARG_SEARCH_PATHS PREPEND "-I") + endif() + + if(APPLE) + set(SDK_FLAGS "-sdk" "${CMAKE_OSX_SYSROOT}") + elseif(WIN32) + set(SDK_FLAGS "-sdk" "$ENV{SDKROOT}") + elseif(DEFINED ${CMAKE_SYSROOT}) + set(SDK_FLAGS "-sdk" "${CMAKE_SYSROOT}") + endif() + + cmake_path(APPEND CMAKE_CURRENT_BINARY_DIR include + OUTPUT_VARIABLE base_path) + + cmake_path(APPEND base_path ${header} + OUTPUT_VARIABLE header_path) + + set(_AllSources $) + set(_SwiftSources $) + add_custom_command(OUTPUT ${header_path} + DEPENDS ${_SwiftSources} + WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR} + COMMAND + ${CMAKE_Swift_COMPILER} -frontend -typecheck + ${ARG_SEARCH_PATHS} + ${_SwiftSources} + ${SDK_FLAGS} + -module-name "${ARG_MODULE_NAME}" + -cxx-interoperability-mode=default + -emit-clang-header-path ${header_path} + COMMENT + "Generating '${header_path}'" + COMMAND_EXPAND_LISTS) + + # Added to public interface for dependees to find. + target_include_directories(${target} PUBLIC ${base_path}) + # Added to the target to ensure target rebuilds if header changes and is used + # by sources in the target. + target_sources(${target} PRIVATE ${header_path}) +endfunction() diff --git a/cmake/modules/InitializeSwift.cmake b/cmake/modules/InitializeSwift.cmake new file mode 100644 index 0000000..b3f4390 --- /dev/null +++ b/cmake/modules/InitializeSwift.cmake @@ -0,0 +1,89 @@ +# This source file is part of the Swift open source project +# +# Copyright (c) 2023 Apple Inc. and the Swift project authors. +# Licensed under Apache License v2.0 with Runtime Library Exception +# +# See https://swift.org/LICENSE.txt for license information + +# Compute the name of the architecture directory on Windows from the CMake +# system processor name. +function(_swift_windows_arch_name output_variable_name target_arch) + if(NOT WIN32) + return() + endif() + + if("${target_arch}" STREQUAL "AMD64") + set("${output_variable_name}" "x86_64" PARENT_SCOPE) + elseif("${target_arch}" STREQUAL "ARM64") + set("${output_variable_name}" "aarch64" PARENT_SCOPE) + else() + message(FATAL_ERROR "Unknown windows architecture: ${target_arch}") + endif() +endfunction() + +# Compute flags and search paths +# NOTE: This logic will eventually move to CMake +function(_setup_swift_paths) + # If we haven't set the swift library search paths, do that now + if(NOT SWIFT_LIBRARY_SEARCH_PATHS) + if(APPLE) + set(SDK_FLAGS "-sdk" "${CMAKE_OSX_SYSROOT}") + endif() + + # Note: This does not handle cross-compiling correctly. + # To handle it correctly, we would need to pass the target triple and + # flags to this compiler invocation. + execute_process( + COMMAND ${CMAKE_Swift_COMPILER} ${SDK_FLAGS} -print-target-info + OUTPUT_VARIABLE SWIFT_TARGET_INFO + ) + + # extract search paths from swift driver response + string(JSON SWIFT_TARGET_PATHS GET ${SWIFT_TARGET_INFO} "paths") + + string(JSON SWIFT_TARGET_LIBRARY_PATHS GET ${SWIFT_TARGET_PATHS} "runtimeLibraryPaths") + string(JSON SWIFT_TARGET_LIBRARY_PATHS_LENGTH LENGTH ${SWIFT_TARGET_LIBRARY_PATHS}) + math(EXPR SWIFT_TARGET_LIBRARY_PATHS_LENGTH "${SWIFT_TARGET_LIBRARY_PATHS_LENGTH} - 1 ") + + string(JSON SWIFT_TARGET_LIBRARY_IMPORT_PATHS GET ${SWIFT_TARGET_PATHS} "runtimeLibraryImportPaths") + string(JSON SWIFT_TARGET_LIBRARY_IMPORT_PATHS_LENGTH LENGTH ${SWIFT_TARGET_LIBRARY_IMPORT_PATHS}) + math(EXPR SWIFT_TARGET_LIBRARY_IMPORT_PATHS_LENGTH "${SWIFT_TARGET_LIBRARY_IMPORT_PATHS_LENGTH} - 1 ") + + string(JSON SWIFT_SDK_IMPORT_PATH ERROR_VARIABLE errno GET ${SWIFT_TARGET_PATHS} "sdkPath") + + foreach(JSON_ARG_IDX RANGE ${SWIFT_TARGET_LIBRARY_PATHS_LENGTH}) + string(JSON SWIFT_LIB GET ${SWIFT_TARGET_LIBRARY_PATHS} ${JSON_ARG_IDX}) + list(APPEND SWIFT_SEARCH_PATHS ${SWIFT_LIB}) + endforeach() + + foreach(JSON_ARG_IDX RANGE ${SWIFT_TARGET_LIBRARY_IMPORT_PATHS_LENGTH}) + string(JSON SWIFT_LIB GET ${SWIFT_TARGET_LIBRARY_IMPORT_PATHS} ${JSON_ARG_IDX}) + list(APPEND SWIFT_SEARCH_PATHS ${SWIFT_LIB}) + endforeach() + + if(SWIFT_SDK_IMPORT_PATH) + list(APPEND SWIFT_SEARCH_PATHS ${SWIFT_SDK_IMPORT_PATH}) + endif() + + # Save the swift library search paths + set(SWIFT_LIBRARY_SEARCH_PATHS ${SWIFT_SEARCH_PATHS} CACHE FILEPATH "Swift driver search paths") + endif() + + link_directories(${SWIFT_LIBRARY_SEARCH_PATHS}) + + if(WIN32) + _swift_windows_arch_name(SWIFT_WIN_ARCH_DIR "${CMAKE_SYSTEM_PROCESSOR}") + set(SWIFT_SWIFTRT_FILE "$ENV{SDKROOT}/usr/lib/swift/windows/${SWIFT_WIN_ARCH_DIR}/swiftrt.obj") + add_link_options("$<$:${SWIFT_SWIFTRT_FILE}>") + elseif(NOT APPLE) + find_file(SWIFT_SWIFTRT_FILE + swiftrt.o + PATHS ${SWIFT_LIBRARY_SEARCH_PATHS} + NO_CACHE + REQUIRED + NO_DEFAULT_PATH) + add_link_options("$<$:${SWIFT_SWIFTRT_FILE}>") + endif() +endfunction() + +_setup_swift_paths()