swift build instructions for the impatient
install dependencies: cmake and ninja
optional dependency for generating documentation: sphinx
copy and paste this block to a terminal:
git clone --depth=1 https://github.com/apple/swift.git swift
git clone --depth=1 https://github.com/apple/swift-llvm.git llvm
git clone --depth=1 https://github.com/apple/swift-clang.git clang
git clone --depth=1 https://github.com/apple/swift-lldb.git lldb
git clone --depth=1 https://github.com/apple/swift-cmark.git cmark
git clone --depth=1 https://github.com/apple/swift-llbuild.git llbuild
git clone --depth=1 https://github.com/apple/swift-package-manager.git swiftpm
git clone --depth=1 https://github.com/apple/swift-corelibs-xctest.git
git clone --depth=1 https://github.com/apple/swift-corelibs-foundation.git
build llvm, clang, swift and swift standard library: ./swift/utils/build-script
create xcode project capable of building swift: ./swift/utils/build-script --xcode --release
create xcode project for editing swift sources only (no build): ./swift/utils/build-script --xcode-ide-only --release
use eclipse generator: /swift/utils/build-script --eclipse --release
more options of the build script can be found in its help text:
https://github.com/apple/swift/blob/master/utils/build-script#L172