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Gonsolo
195 lines
8.5 KiB
Markdown
195 lines
8.5 KiB
Markdown
# Building Swift on Windows
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This document describes how to build Swift for Windows natively. See [the
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Windows doc](./Windows.md) for more about what is possible with Swift on
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Windows.
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There are two supported ways to build Swift on Windows, they are
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1. Using [`clang-cl`](https://clang.llvm.org/docs/UsersManual.html#clang-cl)
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1. Using the Microsoft Visual C++ compiler (MSVC)
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`clang-cl` is recommended over MSVC for building Swift on Windows.
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Although it is possible to build the compiler and the standard library with
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MSVC, and use those built products to compile a Swift program, it won't be
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possible to run the binary without seperately obtaining the Swift runtime. On
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the other hand, `clang-cl` is able to build the runtime, which makes it
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possible to build and run all the components required for Swift natively on
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Windows.
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## `clang-cl`
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- Windows doesn't currently have a build script. You'll need to run commands
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manually to build Swift on Windows.
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- Windows support for Swift is a work in progress and may not work on your
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system, but it has been tested.
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- Using the latest Visual Studio version is recommended (tested with Visual
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Studio 2017 - Version 15.5.5). Swift may fail to build with older C++
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compilers.
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### 1. Install dependencies
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1. Latest version (2.7.12 tested) of [Python
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2](https://www.python.org/downloads/)
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1. Latest version (3.7.0-rc3 tested) of [CMake](https://cmake.org/download/)
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1. Latest version (1.7.1 tested) of
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[Ninja](https://github.com/ninja-build/ninja/releases/latest)
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1. Latest version (2015 Update 3 tested) of [Visual
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Studio](https://www.visualstudio.com/downloads/)
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- Make sure to include "Programming Languages|Visual C++" and "Windows and Web
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Development|Universal Windows App Development|Windows SDK" in your
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installation.
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- Make sure to add Python, CMake and Ninja to your `Path` environment variable
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### 2. Clone the repositories
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1. Create a folder to contain all the Swift repositories
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1. Clone `apple/swift-cmark` into a folder named `cmark`
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1. Clone `apple/swift-clang` into a folder named `clang`
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1. Clone `apple/swift-llvm` into a folder named `llvm`
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1. Clone `apple/swift` into a folder named `swift`
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- Currently, other repositories in the Swift project have not been tested and
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may not be supported.
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### 3. Build ICU
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1. Download and extract the [ICU source
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code](http://site.icu-project.org/download) to a folder named `icu` in the same
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directory as the other Swift project repositories.
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1. Open `src/win32/allinone.sln` in Visual Studio.
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1. Make sure to select the correct architecture from the drop-down in Visual
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Studio.
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1. Right click on the solution in the Solution Explorer window and select
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"Build Solution".
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1. When this is done, add the `<icu-source>/bin` folder to your `Path`
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environment variable.
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### 4. Get ready
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- From within a **developer** command prompt (not PowerShell nor cmd, but [the
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Visual Studio Developer Command
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Prompt](https://msdn.microsoft.com/en-us/library/f35ctcxw.aspx)), execute the
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following command if you have an x64 PC.
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```cmd
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VsDevCmd -arch=amd64
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```
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If instead you're compiling for a 32-bit Windows target, adapt the `arch`
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argument to `x86` and run
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```cmd
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VsDevCmd -arch=x86
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```
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- Then adapt the following command and run it.
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```cmd
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set swift_source_dir=path-to-directory-containing-all-cloned-repositories
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```
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### 5. Build CMark
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- This must be done from within a developer command prompt. CMark is a fairly
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small project and should only take a few minutes to build.
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```cmd
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mkdir "%swift_source_dir%/build/Ninja-RelWithDebInfoAssert/cmark-windows-amd64"
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pushd "%swift_source_dir%/build/Ninja-RelWithDebInfoAssert/cmark-windows-amd64"
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cmake -G "Ninja" "%swift_source_dir%/cmark"
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popd
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cmake --build "%swift_source_dir%/build/Ninja-RelWithDebInfoAssert/cmark-windows-amd64/"
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```
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### 6. Build LLVM/Clang/Compiler-RT
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- This must be done from within a developer command prompt. LLVM and Clang are
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large projects, so building might take a few hours. Make sure that the build
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type (e.g. Debug, Release, RelWithDebInfoAssert) for LLVM/Clang matches the
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build type for Swift.
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- Optionally, you can omit building compiler-rt by removing all lines referring
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to `compiler-rt` below, which should give faster build times.
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```cmd
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mklink /J "%swift_source_dir%/llvm/tools/clang" "%swift_source_dir%/clang"
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mklink /J "%swift_source_dir%/llvm/tools/compiler-rt" "%swift_source_dir%/compiler-rt"
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mkdir "%swift_source_dir%/build/Ninja-RelWithDebInfoAssert/llvm-windows-amd64"
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pushd "%swift_source_dir%/build/Ninja-RelWithDebInfoAssert/llvm-windows-amd64"
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cmake -G "Ninja"^
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-DLLVM_ENABLE_ASSERTIONS=TRUE^
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-DCMAKE_BUILD_TYPE=RelWithDebInfo^
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-DLLVM_TOOL_SWIFT_BUILD=NO^
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-DLLVM_INCLUDE_DOCS=TRUE^
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-DLLVM_TOOL_COMPILER_RT_BUILD=TRUE^
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-DLLVM_BUILD_EXTERNAL_COMPILER_RT=TRUE^
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-DLLVM_LIT_ARGS=-sv^
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-DLLVM_TARGETS_TO_BUILD=X86^
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"%swift_source_dir%/llvm"
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popd
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cmake --build "%swift_source_dir%/build/Ninja-DebugAssert/llvm-windows-amd64"
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```
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### 7. Build Swift
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- This must be done from within a developer command prompt and could take up to
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two hours depending on your system.
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- You may need to adjust the `SWIFT_WINDOWS_LIB_DIRECTORY` parameter depending on
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your target platform or Windows SDK version.
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```cmd
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mkdir "%swift_source_dir%/build/Ninja-DebugAssert/swift-windows-amd64/ninja"
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pushd "%swift_source_dir%/build/Ninja-DebugAssert/swift-windows-amd64/ninja"
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cmake -G "Ninja" "%swift_source_dir%/swift"^
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-DCMAKE_BUILD_TYPE=Debug^
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-DSWIFT_PATH_TO_CMARK_SOURCE="%swift_source_dir%/cmark"^
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-DSWIFT_PATH_TO_CMARK_BUILD="%swift_source_dir%/build/Ninja-RelWithDebInfoAssert/cmark-windows-amd64"^
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-DSWIFT_CMARK_LIBRARY_DIR="%swift_source_dir%/build/Ninja-RelWithDebInfoAssert/cmark-windows-amd64/src"^
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-DSWIFT_PATH_TO_LLVM_SOURCE="%swift_source_dir%/llvm"^
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-DSWIFT_PATH_TO_LLVM_BUILD="%swift_source_dir%/build/Ninja-RelWithDebInfoAssert/llvm-windows-amd64"^
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-DSWIFT_PATH_TO_CLANG_SOURCE="%swift_source_dir%/llvm/tools/clang"^
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-DSWIFT_PATH_TO_CLANG_BUILD="%swift_source_dir%/build/Ninja-RelWithDebInfoAssert/llvm-windows-amd64"^
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-DICU_UC_INCLUDE_DIRS="%swift_source_dir%/icu/include"^
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-DICU_UC_LIBRARY_DIRS="%swift_source_dir%/icu/lib64"^
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-DICU_I18N_INCLUDE_DIRS="%swift_source_dir%/icu/include"^
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-DICU_I18N_LIBRARY_DIRS="%swift_source_dir%/icu/lib64"^
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-DICU_UC_LIB_NAME="icuuc"^
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-DICU_I18N_LIB_NAME="icuin"^
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-DSWIFT_INCLUDE_DOCS=FALSE^
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-DSWIFT_INCLUDE_TESTS=FALSE^
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-DCMAKE_C_COMPILER="<path-to-llvm-bin>/clang-cl.exe"^
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-DCMAKE_CXX_COMPILER="<path-to-llvm-bin>/bin/clang-cl.exe"^
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-DCMAKE_C_FLAGS="-fms-compatibility-version=19.00 /Z7"^
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-DCMAKE_CXX_FLAGS="-fms-compatibility-version=19.00 -Z7" ^
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-DSWIFT_BUILD_RUNTIME_WITH_HOST_COMPILER=FALSE
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popd
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cmake --build "%swift_source_dir%/build/Ninja-DebugAssert/swift-windows-amd64/ninja"
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```
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- To create a Visual Studio project, you'll need to change the generator and,
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if you have a 64 bit processor, specify the generator platform. Note that you
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may get multiple build errors compiling the `swift` project due to an MSBuild
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limitation that file paths cannot exceed 260 characters. These can be
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ignored, as they occur after the build when writing the last build status to
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a file.
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```cmd
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cmake -G "Visual Studio 15" "%swift_source_dir%/swift"^
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-DCMAKE_GENERATOR_PLATFORM="x64"^
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...
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```
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## MSVC
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Follow instructions 1-6 for `clang-cl`, but run the following instead to build Swift
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```cmd
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mkdir "%swift_source_dir%/build/Ninja-DebugAssert/swift-windows-amd64/ninja"
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pushd "%swift_source_dir%/build/Ninja-DebugAssert/swift-windows-amd64/ninja"
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cmake -G "Ninja" "%swift_source_dir%/swift"^
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-DCMAKE_BUILD_TYPE=Debug^
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-DSWIFT_PATH_TO_CMARK_SOURCE="%swift_source_dir%/cmark"^
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-DSWIFT_PATH_TO_CMARK_BUILD="%swift_source_dir%/build/Ninja-DebugAssert/cmark-windows-amd64"^
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-DSWIFT_CMARK_LIBRARY_DIR="%swift_source_dir%/build/Ninja-DebugAssert/cmark-windows-amd64/src"^
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-DSWIFT_PATH_TO_LLVM_SOURCE="%swift_source_dir%/llvm"^
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-DSWIFT_PATH_TO_LLVM_BUILD="%swift_source_dir%/build/Ninja-RelWithDebInfoAssert/llvm-windows-amd64"^
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-DSWIFT_PATH_TO_CLANG_SOURCE="%swift_source_dir%/llvm/tools/clang"^
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-DSWIFT_PATH_TO_CLANG_BUILD="%swift_source_dir%/build/Ninja-RelWithDebInfoAssert/llvm-windows-amd64"^
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-DICU_UC_INCLUDE_DIRS="%swift_source_dir%/icu/include"^
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-DICU_UC_LIBRARY_DIRS="%swift_source_dir%/icu/lib64"^
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-DICU_I18N_INCLUDE_DIRS="%swift_source_dir%/icu/include"^
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-DICU_I18N_LIBRARY_DIRS="%swift_source_dir%/icu/lib64"^
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-DICU_UC_LIB_NAME="icuuc"^
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-DICU_I18N_LIB_NAME="icuin"^
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-DSWIFT_INCLUDE_DOCS=FALSE^
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-DSWIFT_INCLUDE_TESTS=FALSE^
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-DSWIFT_BUILD_DYNAMIC_SDK_OVERLAY=FALSE^
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-DSWIFT_BUILD_RUNTIME_WITH_HOST_COMPILER=FALSE
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popd
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cmake --build "%swift_source_dir%/build/Ninja-DebugAssert/swift-windows-amd64/ninja"
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```
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