| // Copyright 2012 The Go Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file. |
| |
| package main |
| |
| import ( |
| "bytes" |
| "encoding/json" |
| "flag" |
| "fmt" |
| "log" |
| "os" |
| "os/exec" |
| "path/filepath" |
| "sort" |
| "strings" |
| "sync" |
| "time" |
| ) |
| |
| // Initialization for any invocation. |
| |
| // The usual variables. |
| var ( |
| goarch string |
| gobin string |
| gohostarch string |
| gohostos string |
| goos string |
| goarm string |
| go386 string |
| gomips string |
| gomips64 string |
| goroot string |
| goroot_final string |
| goextlinkenabled string |
| gogcflags string // For running built compiler |
| goldflags string |
| workdir string |
| tooldir string |
| oldgoos string |
| oldgoarch string |
| exe string |
| defaultcc map[string]string |
| defaultcxx map[string]string |
| defaultcflags string |
| defaultldflags string |
| defaultpkgconfig string |
| |
| rebuildall bool |
| defaultclang bool |
| |
| vflag int // verbosity |
| ) |
| |
| // The known architectures. |
| var okgoarch = []string{ |
| "386", |
| "amd64", |
| "amd64p32", |
| "arm", |
| "arm64", |
| "mips", |
| "mipsle", |
| "mips64", |
| "mips64le", |
| "ppc64", |
| "ppc64le", |
| "riscv64", |
| "s390x", |
| "sparc64", |
| "wasm", |
| } |
| |
| // The known operating systems. |
| var okgoos = []string{ |
| "darwin", |
| "dragonfly", |
| "js", |
| "linux", |
| "android", |
| "solaris", |
| "freebsd", |
| "nacl", |
| "netbsd", |
| "openbsd", |
| "plan9", |
| "windows", |
| "aix", |
| } |
| |
| // find reports the first index of p in l[0:n], or else -1. |
| func find(p string, l []string) int { |
| for i, s := range l { |
| if p == s { |
| return i |
| } |
| } |
| return -1 |
| } |
| |
| // xinit handles initialization of the various global state, like goroot and goarch. |
| func xinit() { |
| b := os.Getenv("GOROOT") |
| if b == "" { |
| fatalf("$GOROOT must be set") |
| } |
| goroot = filepath.Clean(b) |
| |
| b = os.Getenv("GOROOT_FINAL") |
| if b == "" { |
| b = goroot |
| } |
| goroot_final = b |
| |
| b = os.Getenv("GOBIN") |
| if b == "" { |
| b = pathf("%s/bin", goroot) |
| } |
| gobin = b |
| |
| b = os.Getenv("GOOS") |
| if b == "" { |
| b = gohostos |
| } |
| goos = b |
| if find(goos, okgoos) < 0 { |
| fatalf("unknown $GOOS %s", goos) |
| } |
| |
| b = os.Getenv("GOARM") |
| if b == "" { |
| b = xgetgoarm() |
| } |
| goarm = b |
| |
| b = os.Getenv("GO386") |
| if b == "" { |
| if cansse2() { |
| b = "sse2" |
| } else { |
| b = "387" |
| } |
| } |
| go386 = b |
| |
| b = os.Getenv("GOMIPS") |
| if b == "" { |
| b = "hardfloat" |
| } |
| gomips = b |
| |
| b = os.Getenv("GOMIPS64") |
| if b == "" { |
| b = "hardfloat" |
| } |
| gomips64 = b |
| |
| if p := pathf("%s/src/all.bash", goroot); !isfile(p) { |
| fatalf("$GOROOT is not set correctly or not exported\n"+ |
| "\tGOROOT=%s\n"+ |
| "\t%s does not exist", goroot, p) |
| } |
| |
| b = os.Getenv("GOHOSTARCH") |
| if b != "" { |
| gohostarch = b |
| } |
| if find(gohostarch, okgoarch) < 0 { |
| fatalf("unknown $GOHOSTARCH %s", gohostarch) |
| } |
| |
| b = os.Getenv("GOARCH") |
| if b == "" { |
| b = gohostarch |
| } |
| goarch = b |
| if find(goarch, okgoarch) < 0 { |
| fatalf("unknown $GOARCH %s", goarch) |
| } |
| |
| b = os.Getenv("GO_EXTLINK_ENABLED") |
| if b != "" { |
| if b != "0" && b != "1" { |
| fatalf("unknown $GO_EXTLINK_ENABLED %s", b) |
| } |
| goextlinkenabled = b |
| } |
| |
| gogcflags = os.Getenv("BOOT_GO_GCFLAGS") |
| |
| cc, cxx := "gcc", "g++" |
| if defaultclang { |
| cc, cxx = "clang", "clang++" |
| } |
| defaultcc = compilerEnv("CC", cc) |
| defaultcxx = compilerEnv("CXX", cxx) |
| |
| defaultcflags = os.Getenv("CFLAGS") |
| defaultldflags = os.Getenv("LDFLAGS") |
| |
| b = os.Getenv("PKG_CONFIG") |
| if b == "" { |
| b = "pkg-config" |
| } |
| defaultpkgconfig = b |
| |
| // For tools being invoked but also for os.ExpandEnv. |
| os.Setenv("GO386", go386) |
| os.Setenv("GOARCH", goarch) |
| os.Setenv("GOARM", goarm) |
| os.Setenv("GOHOSTARCH", gohostarch) |
| os.Setenv("GOHOSTOS", gohostos) |
| os.Setenv("GOOS", goos) |
| os.Setenv("GOMIPS", gomips) |
| os.Setenv("GOMIPS64", gomips64) |
| os.Setenv("GOROOT", goroot) |
| os.Setenv("GOROOT_FINAL", goroot_final) |
| |
| // Use a build cache separate from the default user one. |
| // Also one that will be wiped out during startup, so that |
| // make.bash really does start from a clean slate. |
| os.Setenv("GOCACHE", pathf("%s/pkg/obj/go-build", goroot)) |
| |
| // Make the environment more predictable. |
| os.Setenv("LANG", "C") |
| os.Setenv("LANGUAGE", "en_US.UTF8") |
| |
| workdir = xworkdir() |
| xatexit(rmworkdir) |
| |
| tooldir = pathf("%s/pkg/tool/%s_%s", goroot, gohostos, gohostarch) |
| } |
| |
| // compilerEnv returns a map from "goos/goarch" to the |
| // compiler setting to use for that platform. |
| // The entry for key "" covers any goos/goarch not explicitly set in the map. |
| // For example, compilerEnv("CC", "gcc") returns the C compiler settings |
| // read from $CC, defaulting to gcc. |
| // |
| // The result is a map because additional environment variables |
| // can be set to change the compiler based on goos/goarch settings. |
| // The following applies to all envNames but CC is assumed to simplify |
| // the presentation. |
| // |
| // If no environment variables are set, we use def for all goos/goarch. |
| // $CC, if set, applies to all goos/goarch but is overridden by the following. |
| // $CC_FOR_TARGET, if set, applies to all goos/goarch except gohostos/gohostarch, |
| // but is overridden by the following. |
| // If gohostos=goos and gohostarch=goarch, then $CC_FOR_TARGET applies even for gohostos/gohostarch. |
| // $CC_FOR_goos_goarch, if set, applies only to goos/goarch. |
| func compilerEnv(envName, def string) map[string]string { |
| m := map[string]string{"": def} |
| |
| if env := os.Getenv(envName); env != "" { |
| m[""] = env |
| } |
| if env := os.Getenv(envName + "_FOR_TARGET"); env != "" { |
| if gohostos != goos || gohostarch != goarch { |
| m[gohostos+"/"+gohostarch] = m[""] |
| } |
| m[""] = env |
| } |
| |
| for _, goos := range okgoos { |
| for _, goarch := range okgoarch { |
| if env := os.Getenv(envName + "_FOR_" + goos + "_" + goarch); env != "" { |
| m[goos+"/"+goarch] = env |
| } |
| } |
| } |
| |
| return m |
| } |
| |
| // compilerEnvLookup returns the compiler settings for goos/goarch in map m. |
| func compilerEnvLookup(m map[string]string, goos, goarch string) string { |
| if cc := m[goos+"/"+goarch]; cc != "" { |
| return cc |
| } |
| return m[""] |
| } |
| |
| // rmworkdir deletes the work directory. |
| func rmworkdir() { |
| if vflag > 1 { |
| errprintf("rm -rf %s\n", workdir) |
| } |
| xremoveall(workdir) |
| } |
| |
| // Remove trailing spaces. |
| func chomp(s string) string { |
| return strings.TrimRight(s, " \t\r\n") |
| } |
| |
| func branchtag(branch string) (tag string, precise bool) { |
| log := run(goroot, CheckExit, "git", "log", "--decorate=full", "--format=format:%d", "master.."+branch) |
| tag = branch |
| for row, line := range strings.Split(log, "\n") { |
| // Each line is either blank, or looks like |
| // (tag: refs/tags/go1.4rc2, refs/remotes/origin/release-branch.go1.4, refs/heads/release-branch.go1.4) |
| // We need to find an element starting with refs/tags/. |
| const s = " refs/tags/" |
| i := strings.Index(line, s) |
| if i < 0 { |
| continue |
| } |
| // Trim off known prefix. |
| line = line[i+len(s):] |
| // The tag name ends at a comma or paren. |
| j := strings.IndexAny(line, ",)") |
| if j < 0 { |
| continue // malformed line; ignore it |
| } |
| tag = line[:j] |
| if row == 0 { |
| precise = true // tag denotes HEAD |
| } |
| break |
| } |
| return |
| } |
| |
| // findgoversion determines the Go version to use in the version string. |
| func findgoversion() string { |
| // The $GOROOT/VERSION file takes priority, for distributions |
| // without the source repo. |
| path := pathf("%s/VERSION", goroot) |
| if isfile(path) { |
| b := chomp(readfile(path)) |
| // Commands such as "dist version > VERSION" will cause |
| // the shell to create an empty VERSION file and set dist's |
| // stdout to its fd. dist in turn looks at VERSION and uses |
| // its content if available, which is empty at this point. |
| // Only use the VERSION file if it is non-empty. |
| if b != "" { |
| // Some builders cross-compile the toolchain on linux-amd64 |
| // and then copy the toolchain to the target builder (say, linux-arm) |
| // for use there. But on non-release (devel) branches, the compiler |
| // used on linux-amd64 will be an amd64 binary, and the compiler |
| // shipped to linux-arm will be an arm binary, so they will have different |
| // content IDs (they are binaries for different architectures) and so the |
| // packages compiled by the running-on-amd64 compiler will appear |
| // stale relative to the running-on-arm compiler. Avoid this by setting |
| // the version string to something that doesn't begin with devel. |
| // Then the version string will be used in place of the content ID, |
| // and the packages will look up-to-date. |
| // TODO(rsc): Really the builders could be writing out a better VERSION file instead, |
| // but it is easier to change cmd/dist than to try to make changes to |
| // the builder while Brad is away. |
| if strings.HasPrefix(b, "devel") { |
| if hostType := os.Getenv("META_BUILDLET_HOST_TYPE"); strings.Contains(hostType, "-cross") { |
| fmt.Fprintf(os.Stderr, "warning: changing VERSION from %q to %q\n", b, "builder "+hostType) |
| b = "builder " + hostType |
| } |
| } |
| return b |
| } |
| } |
| |
| // The $GOROOT/VERSION.cache file is a cache to avoid invoking |
| // git every time we run this command. Unlike VERSION, it gets |
| // deleted by the clean command. |
| path = pathf("%s/VERSION.cache", goroot) |
| if isfile(path) { |
| return chomp(readfile(path)) |
| } |
| |
| // Show a nicer error message if this isn't a Git repo. |
| if !isGitRepo() { |
| fatalf("FAILED: not a Git repo; must put a VERSION file in $GOROOT") |
| } |
| |
| // Otherwise, use Git. |
| // What is the current branch? |
| branch := chomp(run(goroot, CheckExit, "git", "rev-parse", "--abbrev-ref", "HEAD")) |
| |
| // What are the tags along the current branch? |
| tag := "devel" |
| precise := false |
| |
| // If we're on a release branch, use the closest matching tag |
| // that is on the release branch (and not on the master branch). |
| if strings.HasPrefix(branch, "release-branch.") { |
| tag, precise = branchtag(branch) |
| } |
| |
| if !precise { |
| // Tag does not point at HEAD; add hash and date to version. |
| tag += chomp(run(goroot, CheckExit, "git", "log", "-n", "1", "--format=format: +%h %cd", "HEAD")) |
| } |
| |
| // Cache version. |
| writefile(tag, path, 0) |
| |
| return tag |
| } |
| |
| // isGitRepo reports whether the working directory is inside a Git repository. |
| func isGitRepo() bool { |
| // NB: simply checking the exit code of `git rev-parse --git-dir` would |
| // suffice here, but that requires deviating from the infrastructure |
| // provided by `run`. |
| gitDir := chomp(run(goroot, 0, "git", "rev-parse", "--git-dir")) |
| if !filepath.IsAbs(gitDir) { |
| gitDir = filepath.Join(goroot, gitDir) |
| } |
| return isdir(gitDir) |
| } |
| |
| /* |
| * Initial tree setup. |
| */ |
| |
| // The old tools that no longer live in $GOBIN or $GOROOT/bin. |
| var oldtool = []string{ |
| "5a", "5c", "5g", "5l", |
| "6a", "6c", "6g", "6l", |
| "8a", "8c", "8g", "8l", |
| "9a", "9c", "9g", "9l", |
| "6cov", |
| "6nm", |
| "6prof", |
| "cgo", |
| "ebnflint", |
| "goapi", |
| "gofix", |
| "goinstall", |
| "gomake", |
| "gopack", |
| "gopprof", |
| "gotest", |
| "gotype", |
| "govet", |
| "goyacc", |
| "quietgcc", |
| } |
| |
| // Unreleased directories (relative to $GOROOT) that should |
| // not be in release branches. |
| var unreleased = []string{ |
| "src/cmd/newlink", |
| "src/cmd/objwriter", |
| "src/debug/goobj", |
| "src/old", |
| } |
| |
| // setup sets up the tree for the initial build. |
| func setup() { |
| // Create bin directory. |
| if p := pathf("%s/bin", goroot); !isdir(p) { |
| xmkdir(p) |
| } |
| |
| // Create package directory. |
| if p := pathf("%s/pkg", goroot); !isdir(p) { |
| xmkdir(p) |
| } |
| |
| p := pathf("%s/pkg/%s_%s", goroot, gohostos, gohostarch) |
| if rebuildall { |
| xremoveall(p) |
| } |
| xmkdirall(p) |
| |
| if goos != gohostos || goarch != gohostarch { |
| p := pathf("%s/pkg/%s_%s", goroot, goos, goarch) |
| if rebuildall { |
| xremoveall(p) |
| } |
| xmkdirall(p) |
| } |
| |
| // Create object directory. |
| // We used to use it for C objects. |
| // Now we use it for the build cache, to separate dist's cache |
| // from any other cache the user might have. |
| p = pathf("%s/pkg/obj/go-build", goroot) |
| if rebuildall { |
| xremoveall(p) |
| } |
| xmkdirall(p) |
| |
| // Create tool directory. |
| // We keep it in pkg/, just like the object directory above. |
| if rebuildall { |
| xremoveall(tooldir) |
| } |
| xmkdirall(tooldir) |
| |
| // Remove tool binaries from before the tool/gohostos_gohostarch |
| xremoveall(pathf("%s/bin/tool", goroot)) |
| |
| // Remove old pre-tool binaries. |
| for _, old := range oldtool { |
| xremove(pathf("%s/bin/%s", goroot, old)) |
| } |
| |
| // If $GOBIN is set and has a Go compiler, it must be cleaned. |
| for _, char := range "56789" { |
| if isfile(pathf("%s/%c%s", gobin, char, "g")) { |
| for _, old := range oldtool { |
| xremove(pathf("%s/%s", gobin, old)) |
| } |
| break |
| } |
| } |
| |
| // For release, make sure excluded things are excluded. |
| goversion := findgoversion() |
| if strings.HasPrefix(goversion, "release.") || (strings.HasPrefix(goversion, "go") && !strings.Contains(goversion, "beta")) { |
| for _, dir := range unreleased { |
| if p := pathf("%s/%s", goroot, dir); isdir(p) { |
| fatalf("%s should not exist in release build", p) |
| } |
| } |
| } |
| } |
| |
| /* |
| * Tool building |
| */ |
| |
| // deptab lists changes to the default dependencies for a given prefix. |
| // deps ending in /* read the whole directory; deps beginning with - |
| // exclude files with that prefix. |
| // Note that this table applies only to the build of cmd/go, |
| // after the main compiler bootstrap. |
| var deptab = []struct { |
| prefix string // prefix of target |
| dep []string // dependency tweaks for targets with that prefix |
| }{ |
| {"cmd/go/internal/cfg", []string{ |
| "zdefaultcc.go", |
| "zosarch.go", |
| }}, |
| {"runtime/internal/sys", []string{ |
| "zversion.go", |
| }}, |
| {"go/build", []string{ |
| "zcgo.go", |
| }}, |
| } |
| |
| // depsuffix records the allowed suffixes for source files. |
| var depsuffix = []string{ |
| ".s", |
| ".go", |
| } |
| |
| // gentab records how to generate some trivial files. |
| var gentab = []struct { |
| nameprefix string |
| gen func(string, string) |
| }{ |
| {"zdefaultcc.go", mkzdefaultcc}, |
| {"zosarch.go", mkzosarch}, |
| {"zversion.go", mkzversion}, |
| {"zcgo.go", mkzcgo}, |
| |
| // not generated anymore, but delete the file if we see it |
| {"enam.c", nil}, |
| {"anames5.c", nil}, |
| {"anames6.c", nil}, |
| {"anames8.c", nil}, |
| {"anames9.c", nil}, |
| } |
| |
| // installed maps from a dir name (as given to install) to a chan |
| // closed when the dir's package is installed. |
| var installed = make(map[string]chan struct{}) |
| var installedMu sync.Mutex |
| |
| func install(dir string) { |
| <-startInstall(dir) |
| } |
| |
| func startInstall(dir string) chan struct{} { |
| installedMu.Lock() |
| ch := installed[dir] |
| if ch == nil { |
| ch = make(chan struct{}) |
| installed[dir] = ch |
| go runInstall(dir, ch) |
| } |
| installedMu.Unlock() |
| return ch |
| } |
| |
| // runInstall installs the library, package, or binary associated with dir, |
| // which is relative to $GOROOT/src. |
| func runInstall(dir string, ch chan struct{}) { |
| if dir == "net" || dir == "os/user" || dir == "crypto/x509" { |
| fatalf("go_bootstrap cannot depend on cgo package %s", dir) |
| } |
| |
| defer close(ch) |
| |
| if dir == "unsafe" { |
| return |
| } |
| |
| if vflag > 0 { |
| if goos != gohostos || goarch != gohostarch { |
| errprintf("%s (%s/%s)\n", dir, goos, goarch) |
| } else { |
| errprintf("%s\n", dir) |
| } |
| } |
| |
| workdir := pathf("%s/%s", workdir, dir) |
| xmkdirall(workdir) |
| |
| var clean []string |
| defer func() { |
| for _, name := range clean { |
| xremove(name) |
| } |
| }() |
| |
| // path = full path to dir. |
| path := pathf("%s/src/%s", goroot, dir) |
| name := filepath.Base(dir) |
| |
| ispkg := !strings.HasPrefix(dir, "cmd/") || strings.Contains(dir, "/internal/") |
| |
| // Start final link command line. |
| // Note: code below knows that link.p[targ] is the target. |
| var ( |
| link []string |
| targ int |
| ispackcmd bool |
| ) |
| if ispkg { |
| // Go library (package). |
| ispackcmd = true |
| link = []string{"pack", pathf("%s/pkg/%s_%s/%s.a", goroot, goos, goarch, dir)} |
| targ = len(link) - 1 |
| xmkdirall(filepath.Dir(link[targ])) |
| } else { |
| // Go command. |
| elem := name |
| if elem == "go" { |
| elem = "go_bootstrap" |
| } |
| link = []string{pathf("%s/link", tooldir), "-o", pathf("%s/%s%s", tooldir, elem, exe)} |
| targ = len(link) - 1 |
| } |
| ttarg := mtime(link[targ]) |
| |
| // Gather files that are sources for this target. |
| // Everything in that directory, and any target-specific |
| // additions. |
| files := xreaddir(path) |
| |
| // Remove files beginning with . or _, |
| // which are likely to be editor temporary files. |
| // This is the same heuristic build.ScanDir uses. |
| // There do exist real C files beginning with _, |
| // so limit that check to just Go files. |
| files = filter(files, func(p string) bool { |
| return !strings.HasPrefix(p, ".") && (!strings.HasPrefix(p, "_") || !strings.HasSuffix(p, ".go")) |
| }) |
| |
| for _, dt := range deptab { |
| if dir == dt.prefix || strings.HasSuffix(dt.prefix, "/") && strings.HasPrefix(dir, dt.prefix) { |
| for _, p := range dt.dep { |
| p = os.ExpandEnv(p) |
| files = append(files, p) |
| } |
| } |
| } |
| files = uniq(files) |
| |
| // Convert to absolute paths. |
| for i, p := range files { |
| if !filepath.IsAbs(p) { |
| files[i] = pathf("%s/%s", path, p) |
| } |
| } |
| |
| // Is the target up-to-date? |
| var gofiles, missing []string |
| stale := rebuildall |
| files = filter(files, func(p string) bool { |
| for _, suf := range depsuffix { |
| if strings.HasSuffix(p, suf) { |
| goto ok |
| } |
| } |
| return false |
| ok: |
| t := mtime(p) |
| if !t.IsZero() && !strings.HasSuffix(p, ".a") && !shouldbuild(p, dir) { |
| return false |
| } |
| if strings.HasSuffix(p, ".go") { |
| gofiles = append(gofiles, p) |
| } |
| if t.After(ttarg) { |
| stale = true |
| } |
| if t.IsZero() { |
| missing = append(missing, p) |
| } |
| return true |
| }) |
| |
| // If there are no files to compile, we're done. |
| if len(files) == 0 { |
| return |
| } |
| |
| if !stale { |
| return |
| } |
| |
| // For package runtime, copy some files into the work space. |
| if dir == "runtime" { |
| xmkdirall(pathf("%s/pkg/include", goroot)) |
| // For use by assembly and C files. |
| copyfile(pathf("%s/pkg/include/textflag.h", goroot), |
| pathf("%s/src/runtime/textflag.h", goroot), 0) |
| copyfile(pathf("%s/pkg/include/funcdata.h", goroot), |
| pathf("%s/src/runtime/funcdata.h", goroot), 0) |
| copyfile(pathf("%s/pkg/include/asm_ppc64x.h", goroot), |
| pathf("%s/src/runtime/asm_ppc64x.h", goroot), 0) |
| } |
| |
| // Generate any missing files; regenerate existing ones. |
| for _, p := range files { |
| elem := filepath.Base(p) |
| for _, gt := range gentab { |
| if gt.gen == nil { |
| continue |
| } |
| if strings.HasPrefix(elem, gt.nameprefix) { |
| if vflag > 1 { |
| errprintf("generate %s\n", p) |
| } |
| gt.gen(path, p) |
| // Do not add generated file to clean list. |
| // In runtime, we want to be able to |
| // build the package with the go tool, |
| // and it assumes these generated files already |
| // exist (it does not know how to build them). |
| // The 'clean' command can remove |
| // the generated files. |
| goto built |
| } |
| } |
| // Did not rebuild p. |
| if find(p, missing) >= 0 { |
| fatalf("missing file %s", p) |
| } |
| built: |
| } |
| |
| // Make sure dependencies are installed. |
| var deps []string |
| for _, p := range gofiles { |
| deps = append(deps, readimports(p)...) |
| } |
| for _, dir1 := range deps { |
| startInstall(dir1) |
| } |
| for _, dir1 := range deps { |
| install(dir1) |
| } |
| |
| if goos != gohostos || goarch != gohostarch { |
| // We've generated the right files; the go command can do the build. |
| if vflag > 1 { |
| errprintf("skip build for cross-compile %s\n", dir) |
| } |
| return |
| } |
| |
| var archive string |
| // The next loop will compile individual non-Go files. |
| // Hand the Go files to the compiler en masse. |
| // For package runtime, this writes go_asm.h, which |
| // the assembly files will need. |
| pkg := dir |
| if strings.HasPrefix(dir, "cmd/") && strings.Count(dir, "/") == 1 { |
| pkg = "main" |
| } |
| b := pathf("%s/_go_.a", workdir) |
| clean = append(clean, b) |
| if !ispackcmd { |
| link = append(link, b) |
| } else { |
| archive = b |
| } |
| compile := []string{pathf("%s/compile", tooldir), "-std", "-pack", "-o", b, "-p", pkg} |
| if gogcflags != "" { |
| compile = append(compile, strings.Fields(gogcflags)...) |
| } |
| if dir == "runtime" { |
| compile = append(compile, "-+", "-asmhdr", pathf("%s/go_asm.h", workdir)) |
| } |
| if dir == "internal/bytealg" { |
| // TODO: why don't we generate go_asm.h for all packages |
| // that have any assembly? |
| compile = append(compile, "-asmhdr", pathf("%s/go_asm.h", workdir)) |
| } |
| compile = append(compile, gofiles...) |
| var wg sync.WaitGroup |
| // We use bgrun and immediately wait for it instead of calling run() synchronously. |
| // This executes all jobs through the bgwork channel and allows the process |
| // to exit cleanly in case an error occurs. |
| bgrun(&wg, path, compile...) |
| bgwait(&wg) |
| |
| // Compile the files. |
| for _, p := range files { |
| if !strings.HasSuffix(p, ".s") { |
| continue |
| } |
| |
| var compile []string |
| // Assembly file for a Go package. |
| compile = []string{ |
| pathf("%s/asm", tooldir), |
| "-I", workdir, |
| "-I", pathf("%s/pkg/include", goroot), |
| "-D", "GOOS_" + goos, |
| "-D", "GOARCH_" + goarch, |
| "-D", "GOOS_GOARCH_" + goos + "_" + goarch, |
| } |
| |
| if goarch == "mips" || goarch == "mipsle" { |
| // Define GOMIPS_value from gomips. |
| compile = append(compile, "-D", "GOMIPS_"+gomips) |
| } |
| |
| if goarch == "mips64" || goarch == "mipsle64" { |
| // Define GOMIPS64_value from gomips64. |
| compile = append(compile, "-D", "GOMIPS64_"+gomips64) |
| } |
| |
| doclean := true |
| b := pathf("%s/%s", workdir, filepath.Base(p)) |
| |
| // Change the last character of the output file (which was c or s). |
| b = b[:len(b)-1] + "o" |
| compile = append(compile, "-o", b, p) |
| bgrun(&wg, path, compile...) |
| |
| link = append(link, b) |
| if doclean { |
| clean = append(clean, b) |
| } |
| } |
| bgwait(&wg) |
| |
| if ispackcmd { |
| xremove(link[targ]) |
| dopack(link[targ], archive, link[targ+1:]) |
| return |
| } |
| |
| // Remove target before writing it. |
| xremove(link[targ]) |
| bgrun(&wg, "", link...) |
| bgwait(&wg) |
| } |
| |
| // matchfield reports whether the field (x,y,z) matches this build. |
| // all the elements in the field must be satisfied. |
| func matchfield(f string) bool { |
| for _, tag := range strings.Split(f, ",") { |
| if !matchtag(tag) { |
| return false |
| } |
| } |
| return true |
| } |
| |
| // matchtag reports whether the tag (x or !x) matches this build. |
| func matchtag(tag string) bool { |
| if tag == "" { |
| return false |
| } |
| if tag[0] == '!' { |
| if len(tag) == 1 || tag[1] == '!' { |
| return false |
| } |
| return !matchtag(tag[1:]) |
| } |
| return tag == "gc" || tag == goos || tag == goarch || tag == "cmd_go_bootstrap" || tag == "go1.1" || (goos == "android" && tag == "linux") |
| } |
| |
| // shouldbuild reports whether we should build this file. |
| // It applies the same rules that are used with context tags |
| // in package go/build, except it's less picky about the order |
| // of GOOS and GOARCH. |
| // We also allow the special tag cmd_go_bootstrap. |
| // See ../go/bootstrap.go and package go/build. |
| func shouldbuild(file, dir string) bool { |
| // Check file name for GOOS or GOARCH. |
| name := filepath.Base(file) |
| excluded := func(list []string, ok string) bool { |
| for _, x := range list { |
| if x == ok || ok == "android" && x == "linux" { |
| continue |
| } |
| i := strings.Index(name, x) |
| if i <= 0 || name[i-1] != '_' { |
| continue |
| } |
| i += len(x) |
| if i == len(name) || name[i] == '.' || name[i] == '_' { |
| return true |
| } |
| } |
| return false |
| } |
| if excluded(okgoos, goos) || excluded(okgoarch, goarch) { |
| return false |
| } |
| |
| // Omit test files. |
| if strings.Contains(name, "_test") { |
| return false |
| } |
| |
| // Check file contents for // +build lines. |
| for _, p := range strings.Split(readfile(file), "\n") { |
| p = strings.TrimSpace(p) |
| if p == "" { |
| continue |
| } |
| code := p |
| i := strings.Index(code, "//") |
| if i > 0 { |
| code = strings.TrimSpace(code[:i]) |
| } |
| if code == "package documentation" { |
| return false |
| } |
| if code == "package main" && dir != "cmd/go" && dir != "cmd/cgo" { |
| return false |
| } |
| if !strings.HasPrefix(p, "//") { |
| break |
| } |
| if !strings.Contains(p, "+build") { |
| continue |
| } |
| fields := strings.Fields(p[2:]) |
| if len(fields) < 1 || fields[0] != "+build" { |
| continue |
| } |
| for _, p := range fields[1:] { |
| if matchfield(p) { |
| goto fieldmatch |
| } |
| } |
| return false |
| fieldmatch: |
| } |
| |
| return true |
| } |
| |
| // copy copies the file src to dst, via memory (so only good for small files). |
| func copyfile(dst, src string, flag int) { |
| if vflag > 1 { |
| errprintf("cp %s %s\n", src, dst) |
| } |
| writefile(readfile(src), dst, flag) |
| } |
| |
| // dopack copies the package src to dst, |
| // appending the files listed in extra. |
| // The archive format is the traditional Unix ar format. |
| func dopack(dst, src string, extra []string) { |
| bdst := bytes.NewBufferString(readfile(src)) |
| for _, file := range extra { |
| b := readfile(file) |
| // find last path element for archive member name |
| i := strings.LastIndex(file, "/") + 1 |
| j := strings.LastIndex(file, `\`) + 1 |
| if i < j { |
| i = j |
| } |
| fmt.Fprintf(bdst, "%-16.16s%-12d%-6d%-6d%-8o%-10d`\n", file[i:], 0, 0, 0, 0644, len(b)) |
| bdst.WriteString(b) |
| if len(b)&1 != 0 { |
| bdst.WriteByte(0) |
| } |
| } |
| writefile(bdst.String(), dst, 0) |
| } |
| |
| var runtimegen = []string{ |
| "zaexperiment.h", |
| "zversion.go", |
| } |
| |
| // cleanlist is a list of packages with generated files and commands. |
| var cleanlist = []string{ |
| "runtime/internal/sys", |
| "cmd/cgo", |
| "cmd/go/internal/cfg", |
| "go/build", |
| } |
| |
| func clean() { |
| for _, name := range cleanlist { |
| path := pathf("%s/src/%s", goroot, name) |
| // Remove generated files. |
| for _, elem := range xreaddir(path) { |
| for _, gt := range gentab { |
| if strings.HasPrefix(elem, gt.nameprefix) { |
| xremove(pathf("%s/%s", path, elem)) |
| } |
| } |
| } |
| // Remove generated binary named for directory. |
| if strings.HasPrefix(name, "cmd/") { |
| xremove(pathf("%s/%s", path, name[4:])) |
| } |
| } |
| |
| // remove runtimegen files. |
| path := pathf("%s/src/runtime", goroot) |
| for _, elem := range runtimegen { |
| xremove(pathf("%s/%s", path, elem)) |
| } |
| |
| if rebuildall { |
| // Remove object tree. |
| xremoveall(pathf("%s/pkg/obj/%s_%s", goroot, gohostos, gohostarch)) |
| |
| // Remove installed packages and tools. |
| xremoveall(pathf("%s/pkg/%s_%s", goroot, gohostos, gohostarch)) |
| xremoveall(pathf("%s/pkg/%s_%s", goroot, goos, goarch)) |
| xremoveall(pathf("%s/pkg/%s_%s_race", goroot, gohostos, gohostarch)) |
| xremoveall(pathf("%s/pkg/%s_%s_race", goroot, goos, goarch)) |
| xremoveall(tooldir) |
| |
| // Remove cached version info. |
| xremove(pathf("%s/VERSION.cache", goroot)) |
| } |
| } |
| |
| /* |
| * command implementations |
| */ |
| |
| // The env command prints the default environment. |
| func cmdenv() { |
| path := flag.Bool("p", false, "emit updated PATH") |
| plan9 := flag.Bool("9", false, "emit plan 9 syntax") |
| windows := flag.Bool("w", false, "emit windows syntax") |
| xflagparse(0) |
| |
| format := "%s=\"%s\"\n" |
| switch { |
| case *plan9: |
| format = "%s='%s'\n" |
| case *windows: |
| format = "set %s=%s\r\n" |
| } |
| |
| xprintf(format, "GOARCH", goarch) |
| xprintf(format, "GOBIN", gobin) |
| xprintf(format, "GOCACHE", os.Getenv("GOCACHE")) |
| xprintf(format, "GODEBUG", os.Getenv("GODEBUG")) |
| xprintf(format, "GOHOSTARCH", gohostarch) |
| xprintf(format, "GOHOSTOS", gohostos) |
| xprintf(format, "GOOS", goos) |
| xprintf(format, "GOPROXY", os.Getenv("GOPROXY")) |
| xprintf(format, "GOROOT", goroot) |
| xprintf(format, "GOTMPDIR", os.Getenv("GOTMPDIR")) |
| xprintf(format, "GOTOOLDIR", tooldir) |
| if goarch == "arm" { |
| xprintf(format, "GOARM", goarm) |
| } |
| if goarch == "386" { |
| xprintf(format, "GO386", go386) |
| } |
| if goarch == "mips" || goarch == "mipsle" { |
| xprintf(format, "GOMIPS", gomips) |
| } |
| if goarch == "mips64" || goarch == "mips64le" { |
| xprintf(format, "GOMIPS64", gomips64) |
| } |
| |
| if *path { |
| sep := ":" |
| if gohostos == "windows" { |
| sep = ";" |
| } |
| xprintf(format, "PATH", fmt.Sprintf("%s%s%s", gobin, sep, os.Getenv("PATH"))) |
| } |
| } |
| |
| var ( |
| timeLogEnabled = os.Getenv("GOBUILDTIMELOGFILE") != "" |
| timeLogMu sync.Mutex |
| timeLogFile *os.File |
| timeLogStart time.Time |
| ) |
| |
| func timelog(op, name string) { |
| if !timeLogEnabled { |
| return |
| } |
| timeLogMu.Lock() |
| defer timeLogMu.Unlock() |
| if timeLogFile == nil { |
| f, err := os.OpenFile(os.Getenv("GOBUILDTIMELOGFILE"), os.O_RDWR|os.O_APPEND, 0666) |
| if err != nil { |
| log.Fatal(err) |
| } |
| buf := make([]byte, 100) |
| n, _ := f.Read(buf) |
| s := string(buf[:n]) |
| if i := strings.Index(s, "\n"); i >= 0 { |
| s = s[:i] |
| } |
| i := strings.Index(s, " start") |
| if i < 0 { |
| log.Fatalf("time log %s does not begin with start line", os.Getenv("GOBULDTIMELOGFILE")) |
| } |
| t, err := time.Parse(time.UnixDate, s[:i]) |
| if err != nil { |
| log.Fatalf("cannot parse time log line %q: %v", s, err) |
| } |
| timeLogStart = t |
| timeLogFile = f |
| } |
| t := time.Now() |
| fmt.Fprintf(timeLogFile, "%s %+.1fs %s %s\n", t.Format(time.UnixDate), t.Sub(timeLogStart).Seconds(), op, name) |
| } |
| |
| var toolchain = []string{"cmd/asm", "cmd/cgo", "cmd/compile", "cmd/link"} |
| |
| // The bootstrap command runs a build from scratch, |
| // stopping at having installed the go_bootstrap command. |
| // |
| // WARNING: This command runs after cmd/dist is built with Go 1.4. |
| // It rebuilds and installs cmd/dist with the new toolchain, so other |
| // commands (like "go tool dist test" in run.bash) can rely on bug fixes |
| // made since Go 1.4, but this function cannot. In particular, the uses |
| // of os/exec in this function cannot assume that |
| // cmd.Env = append(os.Environ(), "X=Y") |
| // sets $X to Y in the command's environment. That guarantee was |
| // added after Go 1.4, and in fact in Go 1.4 it was typically the opposite: |
| // if $X was already present in os.Environ(), most systems preferred |
| // that setting, not the new one. |
| func cmdbootstrap() { |
| timelog("start", "dist bootstrap") |
| defer timelog("end", "dist bootstrap") |
| |
| var noBanner bool |
| var debug bool |
| flag.BoolVar(&rebuildall, "a", rebuildall, "rebuild all") |
| flag.BoolVar(&debug, "d", debug, "enable debugging of bootstrap process") |
| flag.BoolVar(&noBanner, "no-banner", noBanner, "do not print banner") |
| |
| xflagparse(0) |
| |
| if debug { |
| // cmd/buildid is used in debug mode. |
| toolchain = append(toolchain, "cmd/buildid") |
| } |
| |
| if isdir(pathf("%s/src/pkg", goroot)) { |
| fatalf("\n\n"+ |
| "The Go package sources have moved to $GOROOT/src.\n"+ |
| "*** %s still exists. ***\n"+ |
| "It probably contains stale files that may confuse the build.\n"+ |
| "Please (check what's there and) remove it and try again.\n"+ |
| "See https://golang.org/s/go14nopkg\n", |
| pathf("%s/src/pkg", goroot)) |
| } |
| |
| if rebuildall { |
| clean() |
| } |
| |
| setup() |
| |
| timelog("build", "toolchain1") |
| checkCC() |
| bootstrapBuildTools() |
| |
| // Remember old content of $GOROOT/bin for comparison below. |
| oldBinFiles, _ := filepath.Glob(pathf("%s/bin/*", goroot)) |
| |
| // For the main bootstrap, building for host os/arch. |
| oldgoos = goos |
| oldgoarch = goarch |
| goos = gohostos |
| goarch = gohostarch |
| os.Setenv("GOHOSTARCH", gohostarch) |
| os.Setenv("GOHOSTOS", gohostos) |
| os.Setenv("GOARCH", goarch) |
| os.Setenv("GOOS", goos) |
| |
| timelog("build", "go_bootstrap") |
| xprintf("Building Go bootstrap cmd/go (go_bootstrap) using Go toolchain1.\n") |
| install("runtime") // dependency not visible in sources; also sets up textflag.h |
| install("cmd/go") |
| if vflag > 0 { |
| xprintf("\n") |
| } |
| |
| gogcflags = os.Getenv("GO_GCFLAGS") // we were using $BOOT_GO_GCFLAGS until now |
| goldflags = os.Getenv("GO_LDFLAGS") |
| goBootstrap := pathf("%s/go_bootstrap", tooldir) |
| cmdGo := pathf("%s/go", gobin) |
| if debug { |
| run("", ShowOutput|CheckExit, pathf("%s/compile", tooldir), "-V=full") |
| copyfile(pathf("%s/compile1", tooldir), pathf("%s/compile", tooldir), writeExec) |
| } |
| |
| // To recap, so far we have built the new toolchain |
| // (cmd/asm, cmd/cgo, cmd/compile, cmd/link) |
| // using Go 1.4's toolchain and go command. |
| // Then we built the new go command (as go_bootstrap) |
| // using the new toolchain and our own build logic (above). |
| // |
| // toolchain1 = mk(new toolchain, go1.4 toolchain, go1.4 cmd/go) |
| // go_bootstrap = mk(new cmd/go, toolchain1, cmd/dist) |
| // |
| // The toolchain1 we built earlier is built from the new sources, |
| // but because it was built using cmd/go it has no build IDs. |
| // The eventually installed toolchain needs build IDs, so we need |
| // to do another round: |
| // |
| // toolchain2 = mk(new toolchain, toolchain1, go_bootstrap) |
| // |
| timelog("build", "toolchain2") |
| if vflag > 0 { |
| xprintf("\n") |
| } |
| xprintf("Building Go toolchain2 using go_bootstrap and Go toolchain1.\n") |
| os.Setenv("CC", compilerEnvLookup(defaultcc, goos, goarch)) |
| goInstall(goBootstrap, append([]string{"-i"}, toolchain...)...) |
| if debug { |
| run("", ShowOutput|CheckExit, pathf("%s/compile", tooldir), "-V=full") |
| run("", ShowOutput|CheckExit, pathf("%s/buildid", tooldir), pathf("%s/pkg/%s_%s/runtime/internal/sys.a", goroot, goos, goarch)) |
| copyfile(pathf("%s/compile2", tooldir), pathf("%s/compile", tooldir), writeExec) |
| } |
| |
| // Toolchain2 should be semantically equivalent to toolchain1, |
| // but it was built using the new compilers instead of the Go 1.4 compilers, |
| // so it should at the least run faster. Also, toolchain1 had no build IDs |
| // in the binaries, while toolchain2 does. In non-release builds, the |
| // toolchain's build IDs feed into constructing the build IDs of built targets, |
| // so in non-release builds, everything now looks out-of-date due to |
| // toolchain2 having build IDs - that is, due to the go command seeing |
| // that there are new compilers. In release builds, the toolchain's reported |
| // version is used in place of the build ID, and the go command does not |
| // see that change from toolchain1 to toolchain2, so in release builds, |
| // nothing looks out of date. |
| // To keep the behavior the same in both non-release and release builds, |
| // we force-install everything here. |
| // |
| // toolchain3 = mk(new toolchain, toolchain2, go_bootstrap) |
| // |
| timelog("build", "toolchain3") |
| if vflag > 0 { |
| xprintf("\n") |
| } |
| xprintf("Building Go toolchain3 using go_bootstrap and Go toolchain2.\n") |
| goInstall(goBootstrap, append([]string{"-a", "-i"}, toolchain...)...) |
| if debug { |
| run("", ShowOutput|CheckExit, pathf("%s/compile", tooldir), "-V=full") |
| run("", ShowOutput|CheckExit, pathf("%s/buildid", tooldir), pathf("%s/pkg/%s_%s/runtime/internal/sys.a", goroot, goos, goarch)) |
| copyfile(pathf("%s/compile3", tooldir), pathf("%s/compile", tooldir), writeExec) |
| } |
| checkNotStale(goBootstrap, append(toolchain, "runtime/internal/sys")...) |
| |
| if goos == oldgoos && goarch == oldgoarch { |
| // Common case - not setting up for cross-compilation. |
| timelog("build", "toolchain") |
| if vflag > 0 { |
| xprintf("\n") |
| } |
| xprintf("Building packages and commands for %s/%s.\n", goos, goarch) |
| } else { |
| // GOOS/GOARCH does not match GOHOSTOS/GOHOSTARCH. |
| // Finish GOHOSTOS/GOHOSTARCH installation and then |
| // run GOOS/GOARCH installation. |
| timelog("build", "host toolchain") |
| if vflag > 0 { |
| xprintf("\n") |
| } |
| xprintf("Building packages and commands for host, %s/%s.\n", goos, goarch) |
| goInstall(goBootstrap, "std", "cmd") |
| checkNotStale(goBootstrap, "std", "cmd") |
| checkNotStale(cmdGo, "std", "cmd") |
| |
| timelog("build", "target toolchain") |
| if vflag > 0 { |
| xprintf("\n") |
| } |
| goos = oldgoos |
| goarch = oldgoarch |
| os.Setenv("GOOS", goos) |
| os.Setenv("GOARCH", goarch) |
| os.Setenv("CC", compilerEnvLookup(defaultcc, goos, goarch)) |
| xprintf("Building packages and commands for target, %s/%s.\n", goos, goarch) |
| } |
| targets := []string{"std", "cmd"} |
| if goos == "js" && goarch == "wasm" { |
| // Skip the cmd tools for js/wasm. They're not usable. |
| targets = targets[:1] |
| } |
| goInstall(goBootstrap, targets...) |
| checkNotStale(goBootstrap, targets...) |
| checkNotStale(cmdGo, targets...) |
| if debug { |
| run("", ShowOutput|CheckExit, pathf("%s/compile", tooldir), "-V=full") |
| run("", ShowOutput|CheckExit, pathf("%s/buildid", tooldir), pathf("%s/pkg/%s_%s/runtime/internal/sys.a", goroot, goos, goarch)) |
| checkNotStale(goBootstrap, append(toolchain, "runtime/internal/sys")...) |
| copyfile(pathf("%s/compile4", tooldir), pathf("%s/compile", tooldir), writeExec) |
| } |
| |
| // Check that there are no new files in $GOROOT/bin other than |
| // go and gofmt and $GOOS_$GOARCH (target bin when cross-compiling). |
| binFiles, _ := filepath.Glob(pathf("%s/bin/*", goroot)) |
| ok := map[string]bool{} |
| for _, f := range oldBinFiles { |
| ok[f] = true |
| } |
| for _, f := range binFiles { |
| elem := strings.TrimSuffix(filepath.Base(f), ".exe") |
| if !ok[f] && elem != "go" && elem != "gofmt" && elem != goos+"_"+goarch { |
| fatalf("unexpected new file in $GOROOT/bin: %s", elem) |
| } |
| } |
| |
| // Remove go_bootstrap now that we're done. |
| xremove(pathf("%s/go_bootstrap", tooldir)) |
| |
| // Print trailing banner unless instructed otherwise. |
| if !noBanner { |
| banner() |
| } |
| } |
| |
| func goInstall(goBinary string, args ...string) { |
| installCmd := []string{goBinary, "install", "-gcflags=all=" + gogcflags, "-ldflags=all=" + goldflags} |
| if vflag > 0 { |
| installCmd = append(installCmd, "-v") |
| } |
| |
| // Force only one process at a time on vx32 emulation. |
| if gohostos == "plan9" && os.Getenv("sysname") == "vx32" { |
| installCmd = append(installCmd, "-p=1") |
| } |
| |
| run(goroot, ShowOutput|CheckExit, append(installCmd, args...)...) |
| } |
| |
| func checkNotStale(goBinary string, targets ...string) { |
| out := run(goroot, CheckExit, |
| append([]string{ |
| goBinary, |
| "list", "-gcflags=all=" + gogcflags, "-ldflags=all=" + goldflags, |
| "-f={{if .Stale}}\tSTALE {{.ImportPath}}: {{.StaleReason}}{{end}}", |
| }, targets...)...) |
| if strings.Contains(out, "\tSTALE ") { |
| os.Setenv("GODEBUG", "gocachehash=1") |
| for _, target := range []string{"runtime/internal/sys", "cmd/dist", "cmd/link"} { |
| if strings.Contains(out, "STALE "+target) { |
| run(goroot, ShowOutput|CheckExit, goBinary, "list", "-f={{.ImportPath}} {{.Stale}}", target) |
| break |
| } |
| } |
| fatalf("unexpected stale targets reported by %s list -gcflags=\"%s\" -ldflags=\"%s\" for %v:\n%s", goBinary, gogcflags, goldflags, targets, out) |
| } |
| } |
| |
| // Cannot use go/build directly because cmd/dist for a new release |
| // builds against an old release's go/build, which may be out of sync. |
| // To reduce duplication, we generate the list for go/build from this. |
| // |
| // We list all supported platforms in this list, so that this is the |
| // single point of truth for supported platforms. This list is used |
| // by 'go tool dist list'. |
| var cgoEnabled = map[string]bool{ |
| "aix/ppc64": false, |
| "darwin/386": true, |
| "darwin/amd64": true, |
| "darwin/arm": true, |
| "darwin/arm64": true, |
| "dragonfly/amd64": true, |
| "freebsd/386": true, |
| "freebsd/amd64": true, |
| "freebsd/arm": false, |
| "linux/386": true, |
| "linux/amd64": true, |
| "linux/arm": true, |
| "linux/arm64": true, |
| "linux/ppc64": false, |
| "linux/ppc64le": true, |
| "linux/mips": true, |
| "linux/mipsle": true, |
| "linux/mips64": true, |
| "linux/mips64le": true, |
| "linux/riscv64": true, |
| "linux/s390x": true, |
| "linux/sparc64": true, |
| "android/386": true, |
| "android/amd64": true, |
| "android/arm": true, |
| "android/arm64": true, |
| "js/wasm": false, |
| "nacl/386": false, |
| "nacl/amd64p32": false, |
| "nacl/arm": false, |
| "netbsd/386": true, |
| "netbsd/amd64": true, |
| "netbsd/arm": true, |
| "openbsd/386": true, |
| "openbsd/amd64": true, |
| "openbsd/arm": false, |
| "plan9/386": false, |
| "plan9/amd64": false, |
| "plan9/arm": false, |
| "solaris/amd64": true, |
| "windows/386": true, |
| "windows/amd64": true, |
| "windows/arm": false, |
| } |
| |
| func needCC() bool { |
| switch os.Getenv("CGO_ENABLED") { |
| case "1": |
| return true |
| case "0": |
| return false |
| } |
| return cgoEnabled[gohostos+"/"+gohostarch] |
| } |
| |
| func checkCC() { |
| if !needCC() { |
| return |
| } |
| if output, err := exec.Command(defaultcc[""], "--help").CombinedOutput(); err != nil { |
| outputHdr := "" |
| if len(output) > 0 { |
| outputHdr = "\nCommand output:\n\n" |
| } |
| fatalf("cannot invoke C compiler %q: %v\n\n"+ |
| "Go needs a system C compiler for use with cgo.\n"+ |
| "To set a C compiler, set CC=the-compiler.\n"+ |
| "To disable cgo, set CGO_ENABLED=0.\n%s%s", defaultcc[""], err, outputHdr, output) |
| } |
| } |
| |
| func defaulttarg() string { |
| // xgetwd might return a path with symlinks fully resolved, and if |
| // there happens to be symlinks in goroot, then the hasprefix test |
| // will never succeed. Instead, we use xrealwd to get a canonical |
| // goroot/src before the comparison to avoid this problem. |
| pwd := xgetwd() |
| src := pathf("%s/src/", goroot) |
| real_src := xrealwd(src) |
| if !strings.HasPrefix(pwd, real_src) { |
| fatalf("current directory %s is not under %s", pwd, real_src) |
| } |
| pwd = pwd[len(real_src):] |
| // guard against xrealwd returning the directory without the trailing / |
| pwd = strings.TrimPrefix(pwd, "/") |
| |
| return pwd |
| } |
| |
| // Install installs the list of packages named on the command line. |
| func cmdinstall() { |
| xflagparse(-1) |
| |
| if flag.NArg() == 0 { |
| install(defaulttarg()) |
| } |
| |
| for _, arg := range flag.Args() { |
| install(arg) |
| } |
| } |
| |
| // Clean deletes temporary objects. |
| func cmdclean() { |
| xflagparse(0) |
| clean() |
| } |
| |
| // Banner prints the 'now you've installed Go' banner. |
| func cmdbanner() { |
| xflagparse(0) |
| banner() |
| } |
| |
| func banner() { |
| if vflag > 0 { |
| xprintf("\n") |
| } |
| xprintf("---\n") |
| xprintf("Installed Go for %s/%s in %s\n", goos, goarch, goroot) |
| xprintf("Installed commands in %s\n", gobin) |
| |
| if !xsamefile(goroot_final, goroot) { |
| // If the files are to be moved, don't check that gobin |
| // is on PATH; assume they know what they are doing. |
| } else if gohostos == "plan9" { |
| // Check that gobin is bound before /bin. |
| pid := strings.Replace(readfile("#c/pid"), " ", "", -1) |
| ns := fmt.Sprintf("/proc/%s/ns", pid) |
| if !strings.Contains(readfile(ns), fmt.Sprintf("bind -b %s /bin", gobin)) { |
| xprintf("*** You need to bind %s before /bin.\n", gobin) |
| } |
| } else { |
| // Check that gobin appears in $PATH. |
| pathsep := ":" |
| if gohostos == "windows" { |
| pathsep = ";" |
| } |
| if !strings.Contains(pathsep+os.Getenv("PATH")+pathsep, pathsep+gobin+pathsep) { |
| xprintf("*** You need to add %s to your PATH.\n", gobin) |
| } |
| } |
| |
| if !xsamefile(goroot_final, goroot) { |
| xprintf("\n"+ |
| "The binaries expect %s to be copied or moved to %s\n", |
| goroot, goroot_final) |
| } |
| } |
| |
| // Version prints the Go version. |
| func cmdversion() { |
| xflagparse(0) |
| xprintf("%s\n", findgoversion()) |
| } |
| |
| // cmdlist lists all supported platforms. |
| func cmdlist() { |
| jsonFlag := flag.Bool("json", false, "produce JSON output") |
| xflagparse(0) |
| |
| var plats []string |
| for p := range cgoEnabled { |
| plats = append(plats, p) |
| } |
| sort.Strings(plats) |
| |
| if !*jsonFlag { |
| for _, p := range plats { |
| xprintf("%s\n", p) |
| } |
| return |
| } |
| |
| type jsonResult struct { |
| GOOS string |
| GOARCH string |
| CgoSupported bool |
| } |
| var results []jsonResult |
| for _, p := range plats { |
| fields := strings.Split(p, "/") |
| results = append(results, jsonResult{ |
| GOOS: fields[0], |
| GOARCH: fields[1], |
| CgoSupported: cgoEnabled[p]}) |
| } |
| out, err := json.MarshalIndent(results, "", "\t") |
| if err != nil { |
| fatalf("json marshal error: %v", err) |
| } |
| if _, err := os.Stdout.Write(out); err != nil { |
| fatalf("write failed: %v", err) |
| } |
| } |