f298ec4fe1
This upgrades to the latest release of ckzg, and also attempts to fix some blst-related build errors that occur on launchpad.net.
129 lines
3.8 KiB
Go
129 lines
3.8 KiB
Go
// Copyright 2021 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package build
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import (
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"fmt"
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"log"
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"os"
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"os/exec"
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"path/filepath"
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"runtime"
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"strings"
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)
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type GoToolchain struct {
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Root string // GOROOT
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// Cross-compilation variables. These are set when running the go tool.
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GOARCH string
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GOOS string
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CC string
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}
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// Go creates an invocation of the go command.
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func (g *GoToolchain) Go(command string, args ...string) *exec.Cmd {
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tool := g.goTool(command, args...)
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// Configure environment for cross build.
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if g.GOARCH != "" && g.GOARCH != runtime.GOARCH {
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tool.Env = append(tool.Env, "CGO_ENABLED=1")
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tool.Env = append(tool.Env, "GOARCH="+g.GOARCH)
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}
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if g.GOOS != "" && g.GOOS != runtime.GOOS {
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tool.Env = append(tool.Env, "GOOS="+g.GOOS)
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}
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// Configure C compiler.
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if g.CC != "" {
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tool.Env = append(tool.Env, "CC="+g.CC)
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} else if os.Getenv("CC") != "" {
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tool.Env = append(tool.Env, "CC="+os.Getenv("CC"))
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}
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// CKZG by default is not portable, append the necessary build flags to make
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// it not rely on modern CPU instructions and enable linking against.
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tool.Env = append(tool.Env, "CGO_CFLAGS=-O2 -g -D__BLST_PORTABLE__")
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return tool
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}
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func (g *GoToolchain) goTool(command string, args ...string) *exec.Cmd {
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if g.Root == "" {
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g.Root = runtime.GOROOT()
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}
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tool := exec.Command(filepath.Join(g.Root, "bin", "go"), command) // nolint: gosec
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tool.Args = append(tool.Args, args...)
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tool.Env = append(tool.Env, "GOROOT="+g.Root)
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// Forward environment variables to the tool, but skip compiler target settings.
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// TODO: what about GOARM?
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skip := map[string]struct{}{"GOROOT": {}, "GOARCH": {}, "GOOS": {}, "GOBIN": {}, "CC": {}}
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for _, e := range os.Environ() {
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if i := strings.IndexByte(e, '='); i >= 0 {
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if _, ok := skip[e[:i]]; ok {
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continue
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}
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}
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tool.Env = append(tool.Env, e)
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}
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return tool
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}
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// DownloadGo downloads the Go binary distribution and unpacks it into a temporary
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// directory. It returns the GOROOT of the unpacked toolchain.
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func DownloadGo(csdb *ChecksumDB, version string) string {
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// Shortcut: if the Go version that runs this script matches the
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// requested version exactly, there is no need to download anything.
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activeGo := strings.TrimPrefix(runtime.Version(), "go")
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if activeGo == version {
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log.Printf("-dlgo version matches active Go version %s, skipping download.", activeGo)
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return runtime.GOROOT()
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}
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ucache, err := os.UserCacheDir()
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if err != nil {
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log.Fatal(err)
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}
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// For Arm architecture, GOARCH includes ISA version.
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os := runtime.GOOS
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arch := runtime.GOARCH
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if arch == "arm" {
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arch = "armv6l"
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}
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file := fmt.Sprintf("go%s.%s-%s", version, os, arch)
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if os == "windows" {
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file += ".zip"
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} else {
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file += ".tar.gz"
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}
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url := "https://golang.org/dl/" + file
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dst := filepath.Join(ucache, file)
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if err := csdb.DownloadFile(url, dst); err != nil {
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log.Fatal(err)
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}
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godir := filepath.Join(ucache, fmt.Sprintf("geth-go-%s-%s-%s", version, os, arch))
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if err := ExtractArchive(dst, godir); err != nil {
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log.Fatal(err)
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}
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goroot, err := filepath.Abs(filepath.Join(godir, "go"))
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if err != nil {
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log.Fatal(err)
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}
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return goroot
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}
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