swift-haiku-build | Google Summer of Code repository

You will find that the repository includes version-specific build scripts and patch files in their respective folders. Below is a short description of what they do:.
build-source.sh - Points to the master branch and compiles the toolchain from source using the swift-upstream patches for Haiku support.
build-source-X.Y.sh - Same as the build-source script but is version-specific and uses version-specific patches for Haiku specific changes. In this case build-source-3.0.sh compiles for Swift 3.
build-script.sh - The build script commands used to configure and build swift itself.
Whenever a new release or a new tag is out, it is possible to update the port by updating all the repositories and applying the patches automatically. Unless you are using the version-specific scripts 'build-source-X.Y.sh', you just update the tag from the releases page at apple/swift and replace it with the newest tag name, usually 'swift-DEVELOPMENT-SNAPSHOT-YYYY-MM-DD-a' in build-source.sh. Then you run either: * sh ./build-source.sh shallow - Which performs a shallow clone of the toolchain from the specified tag. Useful if you don't have a fast network connection nor you want to clone the entire commit history or perhaps saves you some disk space. * sh ./build-source.sh full - Performs a deep clone of the toolchain, with the entire commit history. * sh ./build-source.sh update - Makes it possible to pull all the newer commits prior to cloning from master. But this will reset any file modifications to prevent conflicts with edited files from HEAD.
Building a debug version of Swift (with LLVM even in release mode) will take as much as ~30GB of disk space! You would need to also build with -j1 when linking debug symbols as using multiple threads, will allocate more memory and exhaust your RAM space quickly when linking occurs. Follow steps 1-3 and right after the --stdlib-deployment-targets argument, append --debug-swift to debug the Swift compiler or for debugging the standard library --debug-swift-stdlib.