/usr/share/gocode/src/github.com/constabulary/gb/gc.go is in golang-github-constabulary-gb-dev 0.4.4-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 | package gb
import (
"bytes"
"fmt"
"go/build"
"io"
"io/ioutil"
"os"
"path/filepath"
"runtime"
"strings"
"github.com/pkg/errors"
)
// gc toolchain
type gcToolchain struct {
gc, cc, ld, as, pack string
}
func GcToolchain() func(c *Context) error {
return func(c *Context) error {
// TODO(dfc) this should come from the context, not the runtime.
goroot := runtime.GOROOT()
if goversion == 1.4 && (c.gohostos != c.gotargetos || c.gohostarch != c.gotargetarch) {
// cross-compliation is not supported yet #31
return errors.Errorf("cross compilation from host %s/%s to target %s/%s not supported with Go 1.4", c.gohostos, c.gohostarch, c.gotargetos, c.gotargetarch)
}
tooldir := filepath.Join(goroot, "pkg", "tool", c.gohostos+"_"+c.gohostarch)
exe := ""
if c.gohostos == "windows" {
exe += ".exe"
}
switch {
case goversion == 1.4:
archchar, err := build.ArchChar(c.gotargetarch)
if err != nil {
return err
}
c.tc = &gcToolchain{
gc: filepath.Join(tooldir, archchar+"g"+exe),
ld: filepath.Join(tooldir, archchar+"l"+exe),
as: filepath.Join(tooldir, archchar+"a"+exe),
cc: filepath.Join(tooldir, archchar+"c"+exe),
pack: filepath.Join(tooldir, "pack"+exe),
}
case goversion > 1.4:
c.tc = &gcToolchain{
gc: filepath.Join(tooldir, "compile"+exe),
ld: filepath.Join(tooldir, "link"+exe),
as: filepath.Join(tooldir, "asm"+exe),
pack: filepath.Join(tooldir, "pack"+exe),
}
default:
return errors.Errorf("unsupported Go version: %v", runtime.Version())
}
return nil
}
}
func (t *gcToolchain) Asm(pkg *Package, ofile, sfile string) error {
args := []string{"-o", ofile, "-D", "GOOS_" + pkg.gotargetos, "-D", "GOARCH_" + pkg.gotargetarch}
switch {
case goversion == 1.4:
includedir := filepath.Join(runtime.GOROOT(), "pkg", pkg.gotargetos+"_"+pkg.gotargetarch)
args = append(args, "-I", includedir)
case goversion > 1.4:
odir := filepath.Join(filepath.Dir(ofile))
includedir := filepath.Join(runtime.GOROOT(), "pkg", "include")
args = append(args, "-I", odir, "-I", includedir)
default:
return errors.Errorf("unsupported Go version: %v", runtime.Version())
}
args = append(args, sfile)
if err := mkdir(filepath.Dir(ofile)); err != nil {
return errors.Errorf("gc:asm: %v", err)
}
var buf bytes.Buffer
err := runOut(&buf, pkg.Dir, nil, t.as, args...)
if err != nil {
fmt.Fprintf(os.Stderr, "# %s\n", pkg.ImportPath)
io.Copy(os.Stderr, &buf)
}
return err
}
func (t *gcToolchain) Ld(pkg *Package) error {
// to ensure we don't write a partial binary, link the binary to a temporary file in
// in the target directory, then rename.
dir := pkg.bindir()
if err := mkdir(dir); err != nil {
return err
}
tmp, err := ioutil.TempFile(dir, ".gb-link")
if err != nil {
return err
}
tmp.Close()
args := append(pkg.ldflags, "-o", tmp.Name())
for _, d := range pkg.includePaths() {
args = append(args, "-L", d)
}
args = append(args, "-extld", linkCmd(pkg, "CC", defaultCC))
if goversion > 1.4 {
args = append(args, "-buildmode", pkg.buildmode)
}
args = append(args, pkg.objfile())
var buf bytes.Buffer
if err = runOut(&buf, ".", nil, t.ld, args...); err != nil {
os.Remove(tmp.Name()) // remove partial file
fmt.Fprintf(os.Stderr, "# %s\n", pkg.ImportPath)
io.Copy(os.Stderr, &buf)
return err
}
return os.Rename(tmp.Name(), pkg.Binfile())
}
func (t *gcToolchain) Cc(pkg *Package, ofile, cfile string) error {
if goversion > 1.4 {
return errors.Errorf("gc %f does not support cc", goversion)
}
args := []string{
"-F", "-V", "-w",
"-trimpath", pkg.Context.Workdir(),
"-I", pkg.Workdir(),
"-I", filepath.Join(runtime.GOROOT(), "pkg", pkg.gohostos+"_"+pkg.gohostarch), // for runtime.h
"-o", ofile,
"-D", "GOOS_" + pkg.gotargetos,
"-D", "GOARCH_" + pkg.gotargetarch,
cfile,
}
var buf bytes.Buffer
err := runOut(&buf, pkg.Dir, nil, t.cc, args...)
if err != nil {
fmt.Fprintf(os.Stderr, "# %s\n", pkg.ImportPath)
io.Copy(os.Stderr, &buf)
}
return err
}
func (t *gcToolchain) Pack(pkg *Package, afiles ...string) error {
args := []string{"r"}
args = append(args, afiles...)
dir := filepath.Dir(afiles[0])
var buf bytes.Buffer
err := runOut(&buf, dir, nil, t.pack, args...)
if err != nil {
fmt.Fprintf(os.Stderr, "# %s\n", pkg.ImportPath)
io.Copy(os.Stderr, &buf)
}
return err
}
func (t *gcToolchain) compiler() string { return t.gc }
func (t *gcToolchain) linker() string { return t.ld }
func (t *gcToolchain) Gc(pkg *Package, files []string) error {
outfile := pkg.objfile()
args := append(pkg.gcflags, "-p", pkg.ImportPath, "-pack")
args = append(args, "-o", outfile)
for _, d := range pkg.includePaths() {
args = append(args, "-I", d)
}
if pkg.Goroot && pkg.ImportPath == "runtime" {
// runtime compiles with a special gc flag to emit
// additional reflect type data.
args = append(args, "-+")
}
switch {
case pkg.Complete():
args = append(args, "-complete")
case goversion > 1.4:
asmhdr := filepath.Join(filepath.Dir(outfile), pkg.Name, "go_asm.h")
args = append(args, "-asmhdr", asmhdr)
}
// If there are vendored components, create an -importmap to map the import statement
// to the vendored import path. The possibilities for abusing this flag are endless.
if goversion > 1.5 && pkg.Goroot {
for _, path := range pkg.Package.Imports {
if i := strings.LastIndex(path, "/vendor/"); i >= 0 {
args = append(args, "-importmap", path[i+len("/vendor/"):]+"="+path)
} else if strings.HasPrefix(path, "vendor/") {
args = append(args, "-importmap", path[len("vendor/"):]+"="+path)
}
}
}
args = append(args, files...)
if err := mkdir(filepath.Join(filepath.Dir(outfile), pkg.Name)); err != nil {
return errors.Wrap(err, "mkdir")
}
var buf bytes.Buffer
err := runOut(&buf, pkg.Dir, nil, t.gc, args...)
if err != nil {
fmt.Fprintf(os.Stderr, "# %s\n", pkg.ImportPath)
io.Copy(os.Stderr, &buf)
}
return err
}
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