Add rake task to build a cross toolchain
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.ruby-version
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.ruby-version
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3.3.5
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307
rakelib/cross.rake
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rakelib/cross.rake
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require 'pathname'
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require 'uri'
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require 'net/http'
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require 'rake/clean'
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require 'open3'
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require 'etc'
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GCC_VERSION = "14.2.0"
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BINUTILS_VERSION = '2.43.1'
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GLIBC_VERSION = '2.40'
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KERNEL_VERSION = '5.15.166'
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TMP = Pathname.new('./build')
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CLEAN.include TMP
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class BuildTarget
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attr_accessor(:build, :gcc, :target, :tmp)
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def gxx
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@gcc.gsub 'c', '+'
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end
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def sysroot
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tmp + 'sysroot'
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end
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def rootfs
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tmp + 'rootfs'
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end
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def tools
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tmp + 'tools'
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end
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end
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def gcc_verbose(gcc_binary)
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read, write = IO.pipe
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sh({'LANG' => 'C'}, gcc_binary, '--verbose', err: write)
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write.close
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output = read.read
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read.close
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output
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end
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def find_build_target(gcc_version, task)
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gcc_binary = 'gcc'
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output = gcc_verbose gcc_binary
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if output.start_with? 'Apple clang'
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gcc_binary = "gcc-#{gcc_version.split('.').first}"
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output = gcc_verbose gcc_binary
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end
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result = output
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.lines
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.each_with_object(BuildTarget.new) do |line, accumulator|
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if line.start_with? 'Target: '
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accumulator.build = line.split(' ').last.strip
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elsif line.start_with? 'COLLECT_GCC'
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accumulator.gcc = line.split('=').last.strip
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end
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end
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result.tmp = TMP
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task.with_defaults target: 'riscv32-unknown-linux-gnu'
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result.target = task[:target]
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result
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end
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def download_and_unarchive(url, target)
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case File.extname url.path
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when '.bz2'
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archive_type = '-j'
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root_directory = File.basename url.path, '.tar.bz2'
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when '.xz'
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archive_type = '-J'
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root_directory = File.basename url.path, '.tar.xz'
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else
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raise "Unsupported archive type #{url.path}."
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end
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Net::HTTP.start(url.host, url.port, use_ssl: url.scheme == 'https') do |http|
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request = Net::HTTP::Get.new url.request_uri
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http.request request do |response|
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case response
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when Net::HTTPRedirection
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download_and_unarchive URI.parse(response['location'])
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when Net::HTTPSuccess
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Open3.popen2 'tar', '-C', target.to_path, archive_type, '-xv' do |stdin, stdout, wait_thread|
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stdout.close
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response.read_body do |chunk|
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stdin.write chunk
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end
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end
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else
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response.error!
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end
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end
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end
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target + root_directory
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end
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namespace :cross do
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desc 'Build cross binutils'
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task :binutils, [:target] do |_, args|
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options = find_build_target GCC_VERSION, args
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options.tools.mkpath
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source_directory = download_and_unarchive(
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URI.parse("https://ftp.gnu.org/gnu/binutils/binutils-#{BINUTILS_VERSION}.tar.xz"),
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options.tools)
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cwd = source_directory.dirname + 'build-binutils'
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cwd.mkpath
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options.rootfs.mkpath
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env = {
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'CC' => options.gcc,
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'CXX' => options.gxx
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}
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configure_options = [
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"--prefix=#{options.rootfs.realpath}",
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"--target=#{options.target}",
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'--disable-nls',
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'--enable-gprofng=no',
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'--disable-werror',
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'--enable-default-hash-style=gnu',
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'--disable-libquadmath'
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]
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configure = source_directory.relative_path_from(cwd) + 'configure'
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sh env, configure.to_path, *configure_options, chdir: cwd.to_path
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sh env, 'make', '-j', Etc.nprocessors.to_s, chdir: cwd.to_path
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sh env, 'make', 'install', chdir: cwd.to_path
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end
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desc 'Build stage 1 GCC'
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task :gcc1, [:target] do |_, args|
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options = find_build_target GCC_VERSION, args
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options.tools.mkpath
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source_directory = download_and_unarchive(
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URI.parse("https://gcc.gnu.org/pub/gcc/releases/gcc-#{GCC_VERSION}/gcc-#{GCC_VERSION}.tar.xz"),
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options.tools)
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cwd = source_directory.dirname + 'build-gcc'
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cwd.mkpath
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options.rootfs.mkpath
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options.sysroot.mkpath
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sh 'contrib/download_prerequisites', chdir: source_directory.to_path
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configure_options = [
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"--prefix=#{options.rootfs.realpath}",
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"--with-sysroot=#{options.sysroot.realpath}",
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'--enable-languages=c,c++',
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'--disable-shared',
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'--with-arch=rv32imafdc',
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'--with-abi=ilp32d',
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'--with-tune=rocket',
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'--with-isa-spec=20191213',
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'--disable-bootstrap',
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'--disable-multilib',
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'--disable-libmudflap',
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'--disable-libssp',
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'--disable-libquadmath',
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'--disable-libsanitizer',
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'--disable-threads',
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'--disable-libatomic',
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'--disable-libgomp',
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'--disable-libvtv',
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'--disable-libstdcxx',
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'--disable-nls',
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'--with-newlib',
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'--without-headers',
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"--target=#{options.target}",
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"--build=#{options.build}",
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"--host=#{options.build}"
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]
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flags = '-O2 -fPIC'
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env = {
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'CC' => options.gcc,
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'CXX' => options.gxx,
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'CFLAGS' => flags,
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'CXXFLAGS' => flags,
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'PATH' => "#{options.rootfs.realpath + 'bin'}:#{ENV['PATH']}"
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}
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configure = source_directory.relative_path_from(cwd) + 'configure'
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sh env, configure.to_path, *configure_options, chdir: cwd.to_path
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sh env, 'make', '-j', Etc.nprocessors.to_s, chdir: cwd.to_path
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sh env, 'make', 'install', chdir: cwd.to_path
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end
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desc 'Copy glibc headers'
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task :headers, [:target] do |_, args|
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options = find_build_target GCC_VERSION, args
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options.tools.mkpath
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source_directory = download_and_unarchive(
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URI.parse("https://ftp.gnu.org/gnu/glibc/glibc-#{GLIBC_VERSION}.tar.xz"),
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options.tools)
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include_directory = options.tools + 'include'
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include_directory.mkpath
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cp (source_directory + 'elf/elf.h'), (include_directory + 'elf.h')
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end
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desc 'Build linux kernel'
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task :kernel, [:target] do |_, args|
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options = find_build_target GCC_VERSION, args
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options.tools.mkpath
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cwd = download_and_unarchive(
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URI.parse("https://cdn.kernel.org/pub/linux/kernel/v5.x/linux-#{KERNEL_VERSION}.tar.xz"),
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options.tools)
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env = {
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'CROSS_COMPILE' => "#{options.target}-",
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'ARCH' => 'riscv',
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'PATH' => "#{options.rootfs.realpath + 'bin'}:#{ENV['PATH']}",
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'HOSTCFLAGS' => "-D_UUID_T -D__GETHOSTUUID_H -I#{options.tools.realpath + 'include'}"
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}
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sh env, 'make', 'rv32_defconfig', chdir: cwd.to_path
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sh env, 'make', '-j', Etc.nprocessors.to_s, chdir: cwd.to_path
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sh env, 'make', 'headers', chdir: cwd.to_path
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user_directory = options.sysroot + 'usr'
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user_directory.mkpath
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cp_r (cwd + 'usr/include'), (user_directory + 'include')
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end
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desc 'Build glibc'
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task :glibc, [:target] do |_, args|
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options = find_build_target GCC_VERSION, args
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source_directory = options.tools + "glibc-#{GLIBC_VERSION}"
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configure_options = [
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'--prefix=/usr',
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"--host=#{options.target}",
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"--target=#{options.target}",
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"--build=#{options.build}",
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"--enable-kernel=#{KERNEL_VERSION}",
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"--with-headers=#{options.sysroot.realpath + 'usr/include'}",
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'--disable-nscd',
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'--disable-libquadmath',
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'--disable-libitm',
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'--disable-werror',
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'libc_cv_forced_unwind=yes'
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]
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bin = options.rootfs.realpath + 'bin'
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env = {
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'PATH' => "#{bin}:#{ENV['PATH']}",
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'MAKE' => 'make' # Otherwise it uses gnumake which can be different and too old.
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}
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cwd = source_directory.dirname + 'build-glibc'
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cwd.mkpath
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configure = source_directory.relative_path_from(cwd) +'./configure'
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sh env, configure.to_path, *configure_options, chdir: cwd.to_path
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sh env, 'make', '-j', Etc.nprocessors.to_s, chdir: cwd.to_path
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sh env, 'make', "install_root=#{options.sysroot.realpath}", 'install', chdir: cwd.to_path
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end
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desc 'Build stage 2 GCC'
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task :gcc2, [:target] do |_, args|
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options = find_build_target GCC_VERSION, args
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source_directory = options.tools + "gcc-#{GCC_VERSION}"
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cwd = options.tools + 'build-gcc'
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rm_rf cwd
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cwd.mkpath
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configure_options = [
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"--prefix=#{options.rootfs.realpath}",
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"--with-sysroot=#{options.sysroot.realpath}",
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'--enable-languages=c,c++,lto',
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'--enable-lto',
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'--enable-shared',
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'--with-arch=rv32imafdc',
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'--with-abi=ilp32d',
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'--with-tune=rocket',
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'--with-isa-spec=20191213',
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'--disable-bootstrap',
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'--disable-multilib',
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'--enable-checking=release',
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'--disable-libssp',
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'--disable-libquadmath',
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'--enable-threads=posix',
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'--with-default-libstdcxx-abi=new',
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'--disable-nls',
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"--target=#{options.target}",
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"--build=#{options.build}",
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"--host=#{options.build}"
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]
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flags = '-O2 -fPIC'
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env = {
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'CFLAGS' => flags,
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'CXXFLAGS' => flags,
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'PATH' => "#{options.rootfs.realpath + 'bin'}:#{ENV['PATH']}"
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}
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configure = source_directory.relative_path_from(cwd) + 'configure'
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sh env, configure.to_path, *configure_options, chdir: cwd.to_path
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sh env, 'make', '-j', Etc.nprocessors.to_s, chdir: cwd.to_path
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sh env, 'make', 'install', chdir: cwd.to_path
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end
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end
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task cross: ['cross:binutils', 'cross:gcc1', 'cross:headers', 'cross:kernel', 'cross:glibc', 'cross:gcc2'] do
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end
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