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# Building Swift SDK for Android on Windows
Visual Studio 2019 or newer is needed to build the Swift SDK for Android on
Windows.
## 1. Install Dependencies
- Install the latest version of [Visual Studio](https://www.visualstudio.com/downloads/)
- Make sure to include the android NDK in your installation.
## 1. Clone the repositories
1. Configure git to work with Unix file endings
1. Clone `apple/swift-llvm` into a directory named `llvm`
1. Clone `apple/swift-corelibs-libdispatch` into a directory named `swift-corelibs-libdispatch`
1. Clone `apple/swift-corelibs-foundation` into a directory named `swift-corelibs-foundation`
1. Clone `apple/swift-corelibs-xctest` into a directory named `swift-corelibs-xctest`
1. Clone `compnerd/swift-build` into a directory named `swift-build`
- Currently, other repositories in the Swift project have not been tested and
may not be supported.
This guide assumes that your sources live at the root of `S:`. If your sources
live elsewhere, you can create a substitution for this:
```cmd
subst S: <path to sources>
```
```cmd
S:
git clone https://github.com/apple/swift-llvm llvm
git clone https://github.com/apple/swift-corelibs-libdispatch swift-corelibs-libdispatch
git clone https://github.com/apple/swift-corelibs-foundation swift-corelibs-foundation
git clone https://github.com/apple/swift-corelibs-xctest swift-corelibs-xctest
git clone https://github.com/compnerd/swift-build swift-build
```
## 1. Acquire the latest toolchain and dependencies
1. Download the toolchain, ICU, libxml2, and curl for android from
[Azure](https://dev.azure.com/compnerd/swift-build) into `S:\b\a\Library`.
- You can alternatively use `swift-build.py` from
[compnerd/swift-build](https://www.github.com/compnerd/swift-build) under
the utilities directory.
## 1. Configure LLVM
```cmd
md S:\b\a\llvm
cd S:\b\a\llvm
cmake -C S:\swift-build\cmake\caches\android-armv7.cmake ^
-G Ninja ^
-DCMAKE_BUILD_TYPE=Release ^
-DCMAKE_TOOLCHAIN_FILE=S:\swift-build\cmake\toolchains\android.toolchain.cmake ^
-DANDROID_ALTERNATE_TOOLCHAIN=S:/b/a/Library/Developer/Toolchains/unknown-Asserts-development.xctoolchain/usr ^
-DLLVM_HOST_TRIPLE=armv7-unknown-linux-androideabi ^
S:/llvm
```
## 1. Build and install the standard library
- We must build and install the standard library to build the remainder of the
SDK
```cmd
md S:\b\a\stdlib
cd S:\b\a\stdlib
cmake -C S:\swift-build\cmake\caches\android-armv7.cmake ^
-C S:\swift-build\cmake\caches\swift-stdlib-android-armv7.cmake ^
-G Ninja ^
-DCMAKE_BUILD_TYPE=RelWithDebInfo ^
-DCMAKE_INSTALL_PREFIX=S:/b/a/Library/Developer/Platforms/android.platform/Developer/SDKs/android.sdk/usr ^
-DCMAKE_TOOLCHAIN_FILE=S:\swift-build\cmake\toolchains\android.toolchain.cmake ^
-DANDROID_ALTERNATE_TOOLCHAIN=S:/b/a/Library/Developer/Toolchains/unknown-Asserts-development.xctoolchain/usr ^
-DLLVM_DIR=S:/b/a/llvm/lib/cmake/llvm ^
-DSWIFT_NATIVE_SWIFT_TOOLS_PATH=S:/b/a/Library/Developer/Toolchains/unknown-Asserts-development.xctoolchain/usr/bin ^
S:/swift
ninja
ninja install
```
## 1. Build libdispatch
- We *cannot* install libdispatch until after all builds are complete as that
will cause the Dispatch module to be imported twice and fail to build.
```cmd
md S:\b\a\libdispatch
cd S:\b\a\libdispatch
cmake -C S:\swift-build\cmake\caches\android-armv7.cmake ^
-DSWIFT_ANDROID_SDK=S:/b/a/Library/Developer/Platforms/android.platform/Developer/SDKs/android.sdk ^
-C S:\swift-build\cmake\caches\android-armv7-swift-flags.cmake ^
-G Ninja ^
-DCMAKE_BUILD_TYPE=RelWithDebInfo ^
-DCMAKE_INSTALL_PREFIX=S:/b/a/Library/Developer/Platforms/android.platform/Developer/SDKs/android.sdk/usr ^
-DCMAKE_SWIFT_COMPILER=S:/b/a/Library/Developer/Toolchains/unknown-Asserts-development.xctoolchain/usr/bin/swiftc.exe ^
-DCMAKE_TOOLCHAIN_FILE=S:\swift-build\cmake\toolchains\android.toolchain.cmake ^
-DANDROID_ALTERNATE_TOOLCHAIN=S:/b/a/Library/Developer/Toolchains/unknown-Asserts-development.xctoolchain/usr ^
-DENABLE_SWIFT=YES ^
-DENABLE_TESTING=NO ^
S:/swift-corelibs-libdispatch
ninja
```
## 1. Build foundation
```cmd
md S:\b\a\foundation
cd S:\b\a\foundation
cmake -C S:\swift-build\cmake\caches\android-armv7.cmake ^
-DSWIFT_ANDROID_SDK=S:/b/a/Library/Developer/Platforms/android.platform/Developer/SDKs/android.sdk ^
-C S:\swift-build\cmake\caches\android-armv7-swift-flags.cmake ^
-G Ninja ^
-DCMAKE_BUILD_TYPE=RelWithDebInfo ^
-DCMAKE_INSTALL_PREFIX=S:/b/a/Library/Developer/Platforms/android.platform/Developer/SDKs/android.sdk/usr ^
-DCMAKE_SWIFT_COMPILER=S:/b/a/Library/Developer/Toolchains/unknown-Asserts-development.xctoolchain/usr/bin/swiftc.exe ^
-DCMAKE_TOOLCHAIN_FILE=S:\swift-build\cmake\toolchains\android.toolchain.cmake ^
-DANDROID_ALTERNATE_TOOLCHAIN=S:/b/a/Library/Developer/Toolchains/unknown-Asserts-development.xctoolchain/usr ^
-DCURL_LIBRARY=S:/b/a/Library/libcurl-development/usr/lib/libcurl.a ^
-DCURL_INCLUDE_DIR=S:/b/a/Library/libcurl-development/usr/include ^
-DICU_INCLUDE_DIR=S:/b/a/Library/icu-64/usr/include ^
-DICU_UC_LIBRARY=S:/b/a/Library/icu-64/usr/lib/libicuuc64.so ^
-DICU_UC_LIBRARY_RELEASE=S:/b/a/Library/icu-64/usr/lib/libicuuc64.so ^
-DICU_I18N_LIBRARY=S:/b/a/Library/icu-64/usr/lib/libiucin64.so ^
-DICU_I18N_LIBRARY_RELEASE=S:/b/a/Library/icu-64/usr/lib/libicuin64.so ^
-DLIBXML2_LIBRARY=S:/b/a/Library/libxml2-development/usr/lib/libxml2.a ^
-DLIBXML2_INCLUDE_DIR=S:/b/a/Library/libxml2-development/usr/include/libxml2 ^
-DFOUNDATION_PATH_TO_LIBDISPATCH_SOURCE=S:/swift-corelibs-libdispatch ^
-DFOUNDATION_PATH_TO_LIBDISPATCH_BUILD=S:/b/a/libdispatch ^
S:/swift-corelibs-foundation
ninja
```
## 1. Build XCTest
```cmd
md S:\b\a\xctest
cd S:\b\a\xctest
cmake -C S:\swift-build\cmake\caches\android-armv7.cmake ^
-C S:\swift-build\cmake\caches\android-armv7-swift-flags.cmake ^
-G Ninja ^
-DCMAKE_BUILD_TYPE=RelWithDebInfo ^
-DCMAKE_INSTALL_PREFIX=S:/b/a/Library/Developer/Platforms/android.platform/Developer/SDKs/android.sdk/usr ^
-DCMAKE_SWIFT_COMPILER=S:/b/a/Library/Developer/Toolchains/unknown-Asserts-development.xctoolchain/usr/bin/swiftc.exe ^
-DCMAKE_TOOLCHAIN_FILE=S:\swift-build\cmake\toolchains\android.toolchain.cmake ^
-DANDROID_ALTERNATE_TOOLCHAIN=S:/b/a/Library/Developer/Toolchains/unknown-Asserts-development.xctoolchain/usr ^
-DSWIFT_ANDROID_SDK=S:/b/a/Library/Developer/Platforms/andrfoid.platform/Developer/SDKs/android.sdk ^
-DXCTEST_PATH_TO_FOUNDATION_BUILD=S:/b/a/foundation ^
-DXCTEST_PATH_TO_LIBDISPATCH_SOURCE=S:/swift-corelibs-libdispatch ^
-DXCTEST_PATH_TO_LIBDISPATCH_BUILD=S:/b/a/libdispatch ^
-DENABLE_TESTING=NO ^
S:/swift-corelibs-foundation
ninja
```
## 1. Install libdispatch
```cmd
cd S:\b\a\libdispatch
ninja install
```
## 1. Install Foundation
```cmd
cd S:\b\a\foundation
ninja install
```
## 1. Install XCTest
```cmd
cd S:\b\a\xctest
ninja install
```
|
