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go: build runtime/cgo

Browse Source 
Also rename -v to -x in the build and install commands,
to match the flag in go test (which we can't change
because -v is taken).  Matches sh -x anyway.

R=r, iant, ality
CC=golang-dev
https://golang.org/cl/5504045
This commit is contained in:
Russ Cox 2011-12-20 14:25:23 -05:00
parent 6b772462e4
commit 54fb9940cf
20 changed files with 156 additions and 105 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
src/cmd/cgo/main.go
View File

@ -133,7 +133,7 @@ var cdefs = flag.Bool("cdefs", false, "for bootstrap: write C definitions for C
var objDir = flag.String("objdir", "", "object directory")
var gccgo = flag.Bool("gccgo", false, "generate files for use with gccgo")
var importRuntimeCgo = flag.Bool("import_runtime_cgo", true, "import runtime/cgo in generated code")
var goarch, goos string
func main() {

10
src/cmd/cgo/out.go
View File

@ -32,7 +32,13 @@ func (p *Package) writeDefs() {
// Write C main file for using gcc to resolve imports.
fmt.Fprintf(fm, "int main() { return 0; }\n")
fmt.Fprintf(fm, "void crosscall2(void(*fn)(void*, int), void *a, int c) { }\n")
if *importRuntimeCgo {
fmt.Fprintf(fm, "void crosscall2(void(*fn)(void*, int), void *a, int c) { }\n")
} else {
// If we're not importing runtime/cgo, we *are* runtime/cgo,
// which provides crosscall2. We just need a prototype.
fmt.Fprintf(fm, "void crosscall2(void(*fn)(void*, int), void *a, int c);")
}
fmt.Fprintf(fm, "void _cgo_allocate(void *a, int c) { }\n")
fmt.Fprintf(fm, "void _cgo_panic(void *a, int c) { }\n")
@ -43,7 +49,7 @@ func (p *Package) writeDefs() {
fmt.Fprintf(fgo2, "package %s\n\n", p.PackageName)
fmt.Fprintf(fgo2, "import \"unsafe\"\n\n")
fmt.Fprintf(fgo2, "import \"syscall\"\n\n")
if !*gccgo {
if !*gccgo && *importRuntimeCgo {
fmt.Fprintf(fgo2, "import _ \"runtime/cgo\"\n\n")
}
fmt.Fprintf(fgo2, "type _ unsafe.Pointer\n\n")

188
src/cmd/go/build.go
View File

@ -25,7 +25,7 @@ func init() {
}
var cmdBuild = &Command{
UsageLine: "build [-a] [-n] [-v] [importpath... | gofiles...]",
UsageLine: "build [-a] [-n] [-x] [importpath... | gofiles...]",
Short: "compile packages and dependencies",
Long: `
Build compiles the packages named by the import paths,
@ -37,7 +37,7 @@ source file.
The -a flag forces rebuilding of packages that are already up-to-date.
The -n flag prints the commands but does not run them.
The -v flag prints the commands.
The -x flag prints the commands.
For more about import paths, see 'go help importpath'.
@ -47,18 +47,18 @@ See also: go install, go get, go clean.
var buildA = cmdBuild.Flag.Bool("a", false, "")
var buildN = cmdBuild.Flag.Bool("n", false, "")
var buildV = cmdBuild.Flag.Bool("v", false, "")
var buildX = cmdBuild.Flag.Bool("x", false, "")
func runBuild(cmd *Command, args []string) {
var b builder
b.init(*buildA, *buildN, *buildV)
b.init(*buildA, *buildN, *buildX)
if len(args) > 0 && strings.HasSuffix(args[0], ".go") {
b.do(b.action(modeInstall, modeBuild, goFilesPackage(args, "")))
return
}
a := &action{f: (*builder).nop}
a := &action{}
for _, p := range packages(args) {
a.deps = append(a.deps, b.action(modeBuild, modeBuild, p))
}
@ -66,7 +66,7 @@ func runBuild(cmd *Command, args []string) {
}
var cmdInstall = &Command{
UsageLine: "install [-a] [-n] [-v] [importpath...]",
UsageLine: "install [-a] [-n] [-x] [importpath...]",
Short: "compile and install packages and dependencies",
Long: `
Install compiles and installs the packages named by the import paths,
@ -74,7 +74,7 @@ along with their dependencies.
The -a flag forces reinstallation of packages that are already up-to-date.
The -n flag prints the commands but does not run them.
The -v flag prints the commands.
The -x flag prints the commands.
For more about import paths, see 'go help importpath'.
@ -84,12 +84,12 @@ See also: go build, go get, go clean.
var installA = cmdInstall.Flag.Bool("a", false, "")
var installN = cmdInstall.Flag.Bool("n", false, "")
var installV = cmdInstall.Flag.Bool("v", false, "")
var installX = cmdInstall.Flag.Bool("x", false, "")
func runInstall(cmd *Command, args []string) {
var b builder
b.init(*installA, *installN, *installV)
a := &action{f: (*builder).nop}
b.init(*installA, *installN, *installX)
a := &action{}
for _, p := range packages(args) {
a.deps = append(a.deps, b.action(modeInstall, modeInstall, p))
}
@ -103,7 +103,7 @@ type builder struct {
work string // the temporary work directory (ends in filepath.Separator)
aflag bool // the -a flag
nflag bool // the -n flag
vflag bool // the -v flag
xflag bool // the -x flag
arch string // e.g., "6"
goroot string // the $GOROOT
goarch string // the $GOARCH
@ -113,7 +113,7 @@ type builder struct {
// An action represents a single action in the action graph.
type action struct {
f func(*builder, *action) error // the action itself
f func(*builder, *action) error // the action itself (nil = no-op)
p *Package // the package this action works on
deps []*action // actions that must happen before this one
@ -142,11 +142,11 @@ const (
modeInstall
)
func (b *builder) init(aflag, nflag, vflag bool) {
func (b *builder) init(aflag, nflag, xflag bool) {
var err error
b.aflag = aflag
b.nflag = nflag
b.vflag = vflag
b.xflag = xflag
b.actionCache = make(map[cacheKey]*action)
b.goroot = runtime.GOROOT()
b.goarch = build.DefaultContext.GOARCH
@ -164,7 +164,7 @@ func (b *builder) init(aflag, nflag, vflag bool) {
if err != nil {
fatalf("%s", err)
}
if vflag {
if b.xflag {
fmt.Printf("WORK=%s\n", b.work)
}
atexit(func() { os.RemoveAll(b.work) })
@ -230,23 +230,13 @@ func (b *builder) action(mode buildMode, depMode buildMode, p *Package) *action
a.deps = append(a.deps, b.action(depMode, depMode, p1))
}
if !needInstall(p) && !b.aflag {
// TODO: This is not right if the deps above
// are not all no-ops too. If fmt is up to date
// wrt its own source files, but strconv has
// changed, then fmt is not up to date.
a.f = (*builder).nop
if !needInstall(p) && !b.aflag && allNop(a.deps) {
return a
}
if p.Standard {
switch p.ImportPath {
case "runtime/cgo":
// Too complex - can't build.
a.f = (*builder).nop
return a
case "builtin", "unsafe":
// Fake packages - nothing to build.
a.f = (*builder).nop
return a
}
}
@ -263,6 +253,15 @@ func (b *builder) action(mode buildMode, depMode buildMode, p *Package) *action
return a
}
func allNop(actions []*action) bool {
for _, a := range actions {
if a.f != nil {
return false
}
}
return true
}
// needInstall reports whether p needs to be built and installed.
// That is only true if some source file is newer than the installed package binary.
func needInstall(p *Package) bool {
@ -311,17 +310,15 @@ func (b *builder) do(a *action) {
}
}
}
if err := a.f(b, a); err != nil {
errorf("%s", err)
a.failed = true
if a.f != nil {
if err := a.f(b, a); err != nil {
errorf("%s", err)
a.failed = true
}
}
a.done = true
}
func (b *builder) nop(a *action) error {
return nil
}
// build is the action for building a single package or command.
func (b *builder) build(a *action) error {
obj := filepath.Join(b.work, filepath.FromSlash(a.p.ImportPath+"/_obj")) + string(filepath.Separator)
@ -334,13 +331,38 @@ func (b *builder) build(a *action) error {
return err
}
var objects []string
var gofiles []string
var gofiles, cfiles, sfiles, objects []string
gofiles = append(gofiles, a.p.GoFiles...)
cfiles = append(cfiles, a.p.CFiles...)
sfiles = append(sfiles, a.p.SFiles...)
// run cgo
if len(a.p.CgoFiles) > 0 {
outGo, outObj, err := b.cgo(a.p.Dir, obj, a.p.info)
// In a package using cgo, cgo compiles the C and assembly files with gcc.
// There is one exception: runtime/cgo's job is to bridge the
// cgo and non-cgo worlds, so it necessarily has files in both.
// In that case gcc only gets the gcc_* files.
var gccfiles []string
if a.p.Standard && a.p.ImportPath == "runtime/cgo" {
filter := func(files, nongcc, gcc []string) ([]string, []string) {
for _, f := range files {
if strings.HasPrefix(f, "gcc_") {
gcc = append(gcc, f)
} else {
nongcc = append(nongcc, f)
}
}
return nongcc, gcc
}
cfiles, gccfiles = filter(cfiles, cfiles[:0], gccfiles)
sfiles, gccfiles = filter(sfiles, sfiles[:0], gccfiles)
} else {
gccfiles = append(cfiles, sfiles...)
cfiles = nil
sfiles = nil
}
outGo, outObj, err := b.cgo(a.p.Dir, obj, gccfiles, a.p)
if err != nil {
return err
}
@ -349,15 +371,26 @@ func (b *builder) build(a *action) error {
}
// prepare Go import path list
var inc []string
inc = append(inc, "-I", b.work)
inc := []string{}
incMap := map[string]bool{}
// work directory first
inc = append(inc, "-I", b.work)
incMap[b.work] = true
incMap[build.Path[0].PkgDir()] = true // goroot
incMap[""] = true // ignore empty strings
// then build package directories of dependencies
for _, a1 := range a.deps {
pkgdir := a1.pkgdir
if pkgdir == build.Path[0].PkgDir() || pkgdir == "" {
continue
if pkgdir := a1.pkgdir; !incMap[pkgdir] {
incMap[pkgdir] = true
inc = append(inc, "-I", pkgdir)
}
if !incMap[pkgdir] {
}
// then installed package directories of dependencies
for _, a1 := range a.deps {
if pkgdir := a1.p.t.PkgDir(); !incMap[pkgdir] {
incMap[pkgdir] = true
inc = append(inc, "-I", pkgdir)
}
@ -404,26 +437,21 @@ func (b *builder) build(a *action) error {
}
}
// in a cgo package, the .c files are compiled with gcc during b.cgo above.
// in a non-cgo package, the .c files are compiled with 5c/6c/8c.
// The same convention applies for .s files.
if len(a.p.CgoFiles) == 0 {
for _, file := range a.p.CFiles {
out := file[:len(file)-len(".c")] + "." + b.arch
if err := b.cc(a.p.Dir, obj+out, file); err != nil {
return err
}
objects = append(objects, out)
for _, file := range cfiles {
out := file[:len(file)-len(".c")] + "." + b.arch
if err := b.cc(a.p.Dir, obj, obj+out, file); err != nil {
return err
}
objects = append(objects, out)
}
// assemble .s files
for _, file := range a.p.SFiles {
out := file[:len(file)-len(".s")] + "." + b.arch
if err := b.asm(a.p.Dir, obj+out, file); err != nil {
return err
}
objects = append(objects, out)
// assemble .s files
for _, file := range sfiles {
out := file[:len(file)-len(".s")] + "." + b.arch
if err := b.asm(a.p.Dir, obj, obj+out, file); err != nil {
return err
}
objects = append(objects, out)
}
// pack into archive
@ -474,7 +502,7 @@ func (b *builder) install(a *action) error {
// copyFile is like 'cp src dst'.
func (b *builder) copyFile(dst, src string, perm uint32) error {
if b.nflag || b.vflag {
if b.nflag || b.xflag {
b.showcmd("cp %s %s", src, dst)
if b.nflag {
return nil
@ -510,7 +538,7 @@ func (b *builder) fmtcmd(format string, args ...interface{}) string {
}
// showcmd prints the given command to standard output
// for the implementation of -n or -v.
// for the implementation of -n or -x.
func (b *builder) showcmd(format string, args ...interface{}) {
fmt.Println(b.fmtcmd(format, args...))
}
@ -519,7 +547,7 @@ func (b *builder) showcmd(format string, args ...interface{}) {
// If the commnd fails, run prints information about the failure
// and returns a non-nil error.
func (b *builder) run(dir string, cmdline ...string) error {
if b.nflag || b.vflag {
if b.nflag || b.xflag {
b.showcmd("cd %s; %s", dir, strings.Join(cmdline, " "))
if b.nflag {
return nil
@ -542,7 +570,7 @@ func (b *builder) run(dir string, cmdline ...string) error {
// mkdir makes the named directory.
func (b *builder) mkdir(dir string) error {
if b.nflag || b.vflag {
if b.nflag || b.xflag {
b.showcmd("mkdir -p %s", dir)
if b.nflag {
return nil
@ -567,8 +595,8 @@ func (b *builder) gc(dir, ofile string, gcargs, importArgs []string, gofiles []s
// asm runs the assembler in a specific directory on a specific file
// to generate the named output file.
func (b *builder) asm(dir, ofile, sfile string) error {
return b.run(dir, b.arch+"a", "-o", ofile, "-DGOOS_"+b.goos, "-DGOARCH_"+b.goarch, sfile)
func (b *builder) asm(dir, obj, ofile, sfile string) error {
return b.run(dir, b.arch+"a", "-I", obj, "-o", ofile, "-DGOOS_"+b.goos, "-DGOARCH_"+b.goarch, sfile)
}
// gopack runs the assembler in a specific directory to create
@ -585,10 +613,10 @@ func (b *builder) ld(dir, out string, importArgs []string, mainpkg string) error
// cc runs the gc-toolchain C compiler in a directory on a C file
// to produce an output file.
func (b *builder) cc(dir, ofile, cfile string) error {
func (b *builder) cc(dir, objdir, ofile, cfile string) error {
inc := filepath.Join(runtime.GOROOT(), "pkg",
fmt.Sprintf("%s_%s", b.goos, b.goarch))
return b.run(dir, b.arch+"c", "-FVw", "-I", inc, "-o", ofile, "-DGOOS_"+b.goos, "-DGOARCH_"+b.goarch, cfile)
return b.run(dir, b.arch+"c", "-FVw", "-I", objdir, "-I", inc, "-o", ofile, "-DGOOS_"+b.goos, "-DGOARCH_"+b.goarch, cfile)
}
// gcc runs the gcc C compiler to create an object from a single C file.
@ -617,12 +645,12 @@ func (b *builder) gccCmd(objdir string, flags []string, args ...string) []string
var cgoRe = regexp.MustCompile(`[/\\:]`)
func (b *builder) cgo(dir, obj string, info *build.DirInfo) (outGo, outObj []string, err error) {
func (b *builder) cgo(dir, obj string, csfiles []string, p *Package) (outGo, outObj []string, err error) {
// cgo
// TODO: CGOPKGPATH, CGO_FLAGS?
gofiles := []string{obj + "_cgo_gotypes.go"}
cfiles := []string{"_cgo_main.c", "_cgo_export.c"}
for _, fn := range info.CgoFiles {
for _, fn := range p.CgoFiles {
f := cgoRe.ReplaceAllString(fn[:len(fn)-2], "_")
gofiles = append(gofiles, obj+f+"cgo1.go")
cfiles = append(cfiles, f+"cgo2.c")
@ -630,14 +658,20 @@ func (b *builder) cgo(dir, obj string, info *build.DirInfo) (outGo, outObj []str
defunC := obj + "_cgo_defun.c"
// TODO: make cgo not depend on $GOARCH?
// TODO: make cgo write to obj
if err := b.run(dir, append([]string{"cgo", "-objdir", obj, "--"}, info.CgoFiles...)...); err != nil {
cgoArgs := []string{"cgo", "-objdir", obj}
if p.Standard && p.ImportPath == "runtime/cgo" {
cgoArgs = append(cgoArgs, "-import_runtime_cgo=false")
}
cgoArgs = append(cgoArgs, "--")
cgoArgs = append(cgoArgs, p.CgoFiles...)
if err := b.run(dir, cgoArgs...); err != nil {
return nil, nil, err
}
outGo = append(outGo, gofiles...)
// cc _cgo_defun.c
defunObj := obj + "_cgo_defun." + b.arch
if err := b.cc(dir, defunObj, defunC); err != nil {
if err := b.cc(dir, obj, defunObj, defunC); err != nil {
return nil, nil, err
}
outObj = append(outObj, defunObj)
@ -646,7 +680,7 @@ func (b *builder) cgo(dir, obj string, info *build.DirInfo) (outGo, outObj []str
var linkobj []string
for _, cfile := range cfiles {
ofile := obj + cfile[:len(cfile)-1] + "o"
if err := b.gcc(dir, ofile, info.CgoCFLAGS, obj+cfile); err != nil {
if err := b.gcc(dir, ofile, p.info.CgoCFLAGS, obj+cfile); err != nil {
return nil, nil, err
}
linkobj = append(linkobj, ofile)
@ -654,16 +688,16 @@ func (b *builder) cgo(dir, obj string, info *build.DirInfo) (outGo, outObj []str
outObj = append(outObj, ofile)
}
}
for _, cfile := range info.CFiles {
ofile := obj + cgoRe.ReplaceAllString(cfile[:len(cfile)-1], "_") + "o"
if err := b.gcc(dir, ofile, info.CgoCFLAGS, cfile); err != nil {
for _, file := range csfiles {
ofile := obj + cgoRe.ReplaceAllString(file[:len(file)-1], "_") + "o"
if err := b.gcc(dir, ofile, p.info.CgoCFLAGS, file); err != nil {
return nil, nil, err
}
linkobj = append(linkobj, ofile)
outObj = append(outObj, ofile)
}
dynobj := obj + "_cgo_.o"
if err := b.gccld(dir, dynobj, info.CgoLDFLAGS, linkobj); err != nil {
if err := b.gccld(dir, dynobj, p.info.CgoLDFLAGS, linkobj); err != nil {
return nil, nil, err
}
@ -675,7 +709,7 @@ func (b *builder) cgo(dir, obj string, info *build.DirInfo) (outGo, outObj []str
// cc _cgo_import.ARCH
importObj := obj + "_cgo_import." + b.arch
if err := b.cc(dir, importObj, importC); err != nil {
if err := b.cc(dir, obj, importObj, importC); err != nil {
return nil, nil, err
}
outObj = append(outObj, importObj)

18
src/cmd/go/pkg.go
View File

@ -20,22 +20,22 @@ type Package struct {
// See list.go. It is okay to add fields, but not to change or
// remove existing ones. Keep in sync with list.go
Name string // package name
Doc string // package documentation string
Doc string `json:",omitempty"` // package documentation string
ImportPath string // import path of package in dir
Dir string // directory containing package sources
Version string // version of installed package (TODO)
Standard bool // is this package part of the standard Go library?
Version string `json:",omitempty"` // version of installed package (TODO)
Standard bool `json:",omitempty"` // is this package part of the standard Go library?
// Source files
GoFiles []string // .go source files (excluding CgoFiles)
CFiles []string // .c source files
HFiles []string // .h source files
SFiles []string // .s source files
CgoFiles []string // .go sources files that import "C"
CFiles []string `json:",omitempty"` // .c source files
HFiles []string `json:",omitempty"` // .h source files
SFiles []string `json:",omitempty"` // .s source files
CgoFiles []string `json:",omitempty"` // .go sources files that import "C"
// Dependency information
Imports []string // import paths used by this package
Deps []string // all (recursively) imported dependencies
Imports []string `json:",omitempty"` // import paths used by this package
Deps []string `json:",omitempty"` // all (recursively) imported dependencies
// Unexported fields are not part of the public API.
t *build.Tree

8
src/cmd/go/run.go
View File

@ -12,14 +12,14 @@ func init() {
}
var cmdRun = &Command{
UsageLine: "run [-a] [-n] [-v] gofiles...",
UsageLine: "run [-a] [-n] [-x] gofiles...",
Short: "compile and run Go program",
Long: `
Run compiles and runs the main package comprising the named Go source files.
The -a flag forces reinstallation of packages that are already up-to-date.
The -n flag prints the commands but does not run them.
The -v flag prints the commands.
The -x flag prints the commands.
See also: go build.
`,
@ -27,11 +27,11 @@ See also: go build.
var runA = cmdRun.Flag.Bool("a", false, "")
var runN = cmdRun.Flag.Bool("n", false, "")
var runV = cmdRun.Flag.Bool("v", false, "")
var runX = cmdRun.Flag.Bool("x", false, "")
func runRun(cmd *Command, args []string) {
var b builder
b.init(*runA, *runN, *runV)
b.init(*runA, *runN, *runX)
p := goFilesPackage(args, "")
p.targ = "" // force rebuild - no up-to-date copy anywhere
a1 := b.action(modeBuild, modeBuild, p)

10
src/cmd/go/test.go
View File

@ -248,13 +248,13 @@ func runTest(cmd *Command, args []string) {
}
}
allRuns := &action{f: (*builder).nop, deps: runs}
allRuns := &action{deps: runs}
b.do(allRuns)
}
func (b *builder) test(p *Package) (buildAction, runAction *action, err error) {
if len(p.info.TestGoFiles)+len(p.info.XTestGoFiles) == 0 {
return &action{f: (*builder).nop, p: p}, &action{f: (*builder).notest, p: p}, nil
return &action{p: p}, &action{f: (*builder).notest, p: p}, nil
}
// Build Package structs describing:
@ -310,8 +310,8 @@ func (b *builder) test(p *Package) (buildAction, runAction *action, err error) {
ptest.GoFiles = append(ptest.GoFiles, p.GoFiles...)
ptest.GoFiles = append(ptest.GoFiles, p.info.TestGoFiles...)
ptest.targ = "" // must rebuild
ptest.Imports = p.info.TestImports
ptest.imports = imports
ptest.Imports = append(append([]string{}, p.info.Imports...), p.info.TestImports...)
ptest.imports = append(append([]*Package{}, p.imports...), imports...)
ptest.pkgdir = testDir
} else {
ptest = p
@ -372,7 +372,7 @@ var pass = []byte("\nPASS\n")
// runTest is the action for running a test binary.
func (b *builder) runTest(a *action) error {
if b.nflag || b.vflag {
if b.nflag || b.xflag {
b.showcmd("%s", strings.Join(append([]string{a.deps[0].pkgbin}, testArgs...), " "))
if b.nflag {
return nil

14
src/pkg/runtime/cgo/Makefile
View File

@ -14,15 +14,15 @@ ifeq ($(CGO_ENABLED),1)
# Unwarranted chumminess with Make.pkg's cgo rules.
# Do not try this at home.
CGO_OFILES=\
$(GOARCH).o\
$(GOOS)_$(GOARCH).o\
util.o\
gcc_$(GOARCH).o\
gcc_$(GOOS)_$(GOARCH).o\
gcc_util.o\
ifeq ($(GOOS),windows)
CGO_LDFLAGS=-lm -mthreads
else
CGO_LDFLAGS=-lpthread
CGO_OFILES+=setenv.o\
CGO_OFILES+=gcc_setenv.o\
endif
@ -50,11 +50,11 @@ _cgo_main.c:
echo 'int main() { return 0; }' >$@
endif
$(GOARCH).o: $(GOARCH).S
gcc_$(GOARCH).o: gcc_$(GOARCH).S
$(HOST_CC) $(_CGO_CFLAGS_$(GOARCH)) -g -O2 -fPIC -o $@ -c $^
$(GOOS)_$(GOARCH).o: $(GOOS)_$(GOARCH).c
gcc_$(GOOS)_$(GOARCH).o: gcc_$(GOOS)_$(GOARCH).c
$(HOST_CC) $(_CGO_CFLAGS_$(GOARCH)) -g -O2 -fPIC -o $@ -c $^
%.o: %.c
gcc_%.o: gcc_%.c
$(HOST_CC) $(_CGO_CFLAGS_$(GOARCH)) -g -O2 -fPIC -o $@ -c $^

0
src/pkg/runtime/cgo/amd64.S → src/pkg/runtime/cgo/gcc_amd64.S
View File

0
src/pkg/runtime/cgo/darwin_386.c → src/pkg/runtime/cgo/gcc_darwin_386.c
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1
src/pkg/runtime/cgo/darwin_amd64.c → src/pkg/runtime/cgo/gcc_darwin_amd64.c
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@ -2,6 +2,7 @@
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
#include <string.h> /* for strerror */
#include <pthread.h>
#include "libcgo.h"

0
src/pkg/runtime/cgo/freebsd_386.c → src/pkg/runtime/cgo/gcc_freebsd_386.c
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0
src/pkg/runtime/cgo/freebsd_amd64.c → src/pkg/runtime/cgo/gcc_freebsd_amd64.c
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0
src/pkg/runtime/cgo/linux_386.c → src/pkg/runtime/cgo/gcc_linux_386.c
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0
src/pkg/runtime/cgo/linux_amd64.c → src/pkg/runtime/cgo/gcc_linux_amd64.c
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0
src/pkg/runtime/cgo/linux_arm.c → src/pkg/runtime/cgo/gcc_linux_arm.c
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0
src/pkg/runtime/cgo/setenv.c → src/pkg/runtime/cgo/gcc_setenv.c
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0
src/pkg/runtime/cgo/util.c → src/pkg/runtime/cgo/gcc_util.c
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0
src/pkg/runtime/cgo/windows_386.c → src/pkg/runtime/cgo/gcc_windows_386.c
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0
src/pkg/runtime/cgo/windows_amd64.c → src/pkg/runtime/cgo/gcc_windows_amd64.c
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10
src/pkg/runtime/cgo/trigger.go Normal file
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@ -0,0 +1,10 @@
// Copyright 2011 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.
// This tells the go tool that this package builds using cgo.
// TODO: Once we stop using Make, this import can move into cgo.go.
package cgo
import "C"