Swift 3.0.2 For Raspberry Pi Zero/1/2/3
Published on December 30, 2016
I’ve finally got around to building the latest Swift release (3.0.2, distributed with XCode8.2.1) for all the Raspberry Pi boards.
The ARMv6 version that runs on the original RaspberryPi (A,B,A+,B+) and the Zero, requires the latest Raspbian released on November 2016. This version does not have a working Swift Package Manager at the moment, so for now you’ll have to do without it. Get it here.
The ARMv7 version that runs on both the RaspberryPi 2 and 3 requires Ubuntu 16.04 and you can get it here.
A Few Notes On Compiling For The Original Raspberry (ARMv6)
Currently Swift requires a few patches to compile on ARM boards that are collected and kept up to date in the repositories of swift-arm by William Dillon.
Building for the original Raspberry Pi and the Zero requires an additional small patch and a few manual steps.
I’ve created a repository that contains the scripts I’ve used to clone, patch and build Swift (derived from package-swift) for those who want to replicate what I did.
Building on the original Raspberry using the release of Raspbian from November will require a slightly different set of packages:
sudo apt-get install git cmake ninja-build clang-3.7 python uuid-dev libicu-dev icu-devtools libbsd-dev libedit-dev libxml2-dev libsqlite3-dev swig libpython-dev libncurses5-dev pkg-config libblocksruntime-dev libcurl4-openssl-dev autoconf libtool systemtap-sdt-dev libkqueue-dev
Luckily Clang 3.7 is now available from the official Raspbian repository and the only additional package we need is libkqueue-dev.
Since SPM does not work at the moment, we don’t need to build that project, so its build option can be omitted from the build command:
./swift/utils/build-script --build-subdir mybuild_linux -R --lldb --llbuild --xctest --foundation --libdispatch -- --install-libdispatch --install-foundation --install-swift --install-lldb --install-llbuild --install-xctest --install-prefix=/usr '--swift-install-components=autolink-driver;compiler;clang-builtin-headers;stdlib;swift-remote-mirror;sdk-overlay;dev' --build-swift-static-stdlib --build-swift-static-sdk-overlay --install-destdir=${INSTALL_DIR} --installable-package=${PACKAGE} --verbose-build
Once we have cloned the main repository and all the repositories for the subprojects, that command will start the build.
The build will fail near the end of the compilation of the swift-linux-armv6 directory with this error:
FAILED: cd /home/pi/buildswift/build/mybuild_linux/swift-linux-armv6/stdlib/public/Platform && /usr/lo
cal/bin/cmake -E make_directory /home/pi/buildswift/build/mybuild_linux/swift-linux-armv6/stdlib/public/Pl
atform/linux/armv6 && /usr/local/bin/cmake -E make_directory /home/pi/buildswift/build/mybuild_linux/swift
-linux-armv6/./lib/swift/linux/armv6 && /home/pi/buildswift/swift/utils/line-directive /home/pi/buildswift/
swift/stdlib/public/Platform/Glibc.swift /home/pi/buildswift/swift/stdlib/public/Platform/Platform.swift /h
ome/pi/buildswift/swift/stdlib/public/Platform/TiocConstants.swift /home/pi/buildswift/build/mybuild_linux
/swift-linux-armv6/stdlib/public/Platform/4/tgmath.swift -- /home/pi/buildswift/build/mybuild_linux/swift-
linux-armv6/./bin/swiftc -c -sdk / -target armv6-unknown-linux-gnueabihf -resource-dir /home/pi/buildswift/
build/mybuild_linux/swift-linux-armv6/./lib/swift -O -D INTERNAL_CHECKS_ENABLED -I /home/pi/buildswift/bui
ld/mybuild_linux/swift-linux-armv6/./lib/swift/linux/armv6 -module-cache-path /home/pi/buildswift/build/bu
ildbot_linux/swift-linux-armv6/./module-cache -no-link-objc-runtime -autolink-force-load -module-link-name
swiftGlibc -force-single-frontend-invocation -parse-as-library -emit-module -emit-module-path /home/pi/buil
dswift/build/mybuild_linux/swift-linux-armv6/./lib/swift/linux/armv6/Glibc.swiftmodule -o /home/pi/buildsw
ift/build/mybuild_linux/swift-linux-armv6/stdlib/public/Platform/linux/armv6/Glibc.o /home/pi/buildswift/s
wift/stdlib/public/Platform/Glibc.swift /home/pi/buildswift/swift/stdlib/public/Platform/Platform.swift /ho
me/pi/buildswift/swift/stdlib/public/Platform/TiocConstants.swift /home/pi/buildswift/build/mybuild_linux/
swift-linux-armv6/stdlib/public/Platform/4/tgmath.swift
/home/pi/buildswift/swift/stdlib/public/Platform/Glibc.swift:13:19: error: no such module 'SwiftGlibc'
@_exported import SwiftGlibc // Clang module
^
ninja: build stopped: subcommand failed.
To get past this point, go to build/mybuild_linux/swift-linux-armv6 and complete manually the creation of the SwiftGlibc module using:
ninja swiftGlibc-linux-armv6-static
Once this is done, you can go back to the root and launch again the build command. Nothing else was needed for 3.0.2, future releases will likely need further adjustments.
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