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# This Source Code Form is subject to the terms of the Mozilla Public License,
# v. 2.0. If a copy of the MPL was not distributed with this file, You can
# obtain one at https://mozilla.org/MPL/2.0/. -}
# frozen_string_literal: true
require 'uri'
require 'net/http'
require 'open3'
require 'pathname'
def gcc_verbose(gcc_binary)
read, write = IO.pipe
sh({'LC_ALL' => 'C'}, gcc_binary, '--verbose', err: write)
write.close
output = read.read
read.close
output
end
def find_build_target
gcc_verbose(ENV.fetch 'CC', 'gcc')
.lines
.find { |line| line.start_with? 'Target: ' }
.split(' ')
.last
.strip
end
def download_and_pipe(url, target, command)
target.mkpath
Net::HTTP.start(url.host, url.port, use_ssl: url.scheme == 'https') do |http|
request = Net::HTTP::Get.new url.request_uri
http.request request do |response|
case response
when Net::HTTPRedirection
download_and_pipe URI.parse(response['location']), target, command
when Net::HTTPSuccess
Dir.chdir target.to_path do
Open3.popen2(*command) do |stdin, stdout, wait_thread|
Thread.new do
stdout.each { |line| puts line }
end
response.read_body do |chunk|
stdin.write chunk
end
stdin.close
wait_thread.value
end
end
else
response.error!
end
end
end
end
def link_frontend(source, destination)
File.symlink Pathname.new(source).relative_path_from(destination), (destination + File.basename(source))
end
namespace :gcc do
# Dependencies.
GCC_VERSION = "16.1.0"
HOST_GCC = 'build/host/gcc'
GCC_TREE = Pathname.new "build/tools/gcc-#{GCC_VERSION}"
GCC_PATCH = 'https://raw.githubusercontent.com/Homebrew/homebrew-core/refs/heads/main/Patches/gcc/gcc-16.1.0.diff'
directory HOST_GCC
directory 'build/host/install'
directory 'build/tools'
desc 'Download the bootstrap compiler and its prerequisites'
task download: 'build/tools' do
url = URI.parse "https://gcc.gnu.org/pub/gcc/releases/gcc-#{GCC_VERSION}/gcc-#{GCC_VERSION}.tar.xz"
download_and_pipe url, GCC_TREE.dirname, ['tar', '-Jxv']
download_and_pipe URI.parse(GCC_PATCH), GCC_TREE, ['patch', '-p1']
# GCC 16.1.0 registers 17 languages but CL_PARAMS is at bit 16,
# which collides with the 17th language class (CL_Rust). Shift
# every CL_* constant from bit 16 upward by one position.
File.open(GCC_TREE + 'gcc/opts.h', 'r+') do |opts_h|
content = opts_h.read.gsub(/\(1U << (\d+)\)/) do |m|
"(1U << #{$1.to_i + 1})"
end
opts_h.seek 0, IO::SEEK_SET
opts_h.write content
end
sh 'contrib/download_prerequisites', chdir: GCC_TREE.to_path
end
desc 'Link the frontend into the GCC source tree'
task :link do
source_destination = GCC_TREE + 'gcc/elna'
test_destination = GCC_TREE + 'gcc/testsuite/elna.dg'
rm_rf [source_destination, test_destination]
mkdir_p [source_destination, test_destination]
FileList['boot', 'include', 'COPYING3', 'README.md', 'gcc/gcc', 'gcc/*.in', 'gcc/lang*'].each do |file|
link_frontend file, source_destination
end
FileList['testsuite/*', 'gcc/dg.exp', 'README.md'].each do |file|
link_frontend file, test_destination
end
destination = GCC_TREE + 'gcc/testsuite/lib'
FileList['gcc/testlib/*'].each do |file|
rm_f (destination + File.basename(file))
link_frontend file, destination
end
end
desc 'Configure the bootstrap compiler'
task configure: [HOST_GCC, 'build/host/install'] do |t|
build_target = find_build_target
configure_options = [
"--prefix=#{File.realpath t.prerequisites.last}",
'--enable-languages=c,c++,jit,elna',
'--disable-bootstrap',
'--disable-multilib',
'--enable-host-shared',
'--with-system-zlib',
"--target=#{build_target}",
"--build=#{build_target}",
"--host=#{build_target}"
]
mac_os_sdk = '/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk'
configure_options << "--with-sysroot=#{mac_os_sdk}" if File.symlink? mac_os_sdk
env = ENV.slice 'CC', 'CXX'
env['CFLAGS'] = env['CXXFLAGS'] = '-O0 -g -fPIC -I/opt/homebrew/opt/flex/include'
configure = GCC_TREE.relative_path_from(HOST_GCC) + 'configure'
sh env, configure.to_path, *configure_options, chdir: HOST_GCC
end
desc 'Make and install the bootstrap compiler'
task :make do
sh 'make', '-j', Etc.nprocessors.to_s, chdir: HOST_GCC
sh 'make', 'install', chdir: HOST_GCC
end
desc 'Run tests'
task :check do
sh 'make', 'check-elna', chdir: File.join(HOST_GCC, 'gcc')
end
desc 'Run clang-tidy'
task :tidy do
compile_db = Pathname.new 'compile_commands.json'
raise "#{compile_db} is missing. Run: bear -- rake gcc:make" unless compile_db.exist?
sources = FileList['boot/*.cc', 'include/elna/boot/*.h'].exclude do |f|
f.include?('generated/')
end
sh 'clang-tidy', '-p', compile_db.to_path, '--extra-arg=-w', '--warnings-as-errors=*', *sources
end
desc 'Build documentation'
task :doc do
sh 'make', 'html', chdir: File.join(HOST_GCC, 'gcc')
end
end
desc 'Build the bootstrap compiler'
task gcc: %w[gcc:download gcc:link gcc:configure gcc:make]
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