go build -o myatomic.a sync/atomic
exists myatomic.a
exec $GOBIN/isarchive myatomic.a
! exists atomic
! exists atomic.a
! exists atomic.exe

! go build -o whatever cmd/gofmt sync/atomic
stderr 'multiple packages'

-- go.mod --
module m

go 1.16
-- x.go --
package main

func main() {}
-- p.go --
package p
-- isarchive/isarchive.go --
package main

import (
	"bytes"
	"fmt"
	"io"

 * adding special code in cmd/link.
 * However, it will be called for every Go programs which has cgo.
 * Inside _rt0_ppc64_aix_lib(), runtime.isarchive is checked in order
 * to know if this program is a c-archive or a simple cgo program.
 * If it's not set, _rt0_ppc64_ax_lib() returns directly.
 */
static void libinit() {
	_rt0_ppc64_aix_lib();

// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

//go:build unix

package runtime

func checkfds() {
	if islibrary || isarchive {
		// If the program is actually a library, presumably being consumed by
		// another program, we don't want to mess around with the file
		// descriptors.
		return
	}

	const (

	"path"
	"path/filepath"
	"sort"
	"strings"
	"time"
)

// An Archive describes an archive to write: a collection of files.
// Directories are implied by the files and not explicitly listed.
type Archive struct {
	Files []File
}

// A File describes a single file to write to an archive.
type File struct {
	Name string    // name in archive
	Time time.Time // modification time
	Mode fs.FileMode
	Size int64

// ParseFile parses the named file as an archive.
func ParseFile(file string) (*Archive, error) {
	data, err := os.ReadFile(file)
	if err != nil {
		return nil, err
	}
	return Parse(data), nil
}

// Parse parses the serialized form of an Archive.
// The returned Archive holds slices of data.
func Parse(data []byte) *Archive {
	a := new(Archive)
	var name string
	a.Comment, name, data = findFileMarker(data)
	for name != "" {

// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package archive

import (
	"archive/tar"
	"compress/gzip"
	"io"
	"os"
	"path/filepath"
	"strings"
	"sync"
)

const (
	bugReportSubdir        = "bug-report"
	proxyLogsPathSubdir    = "proxies"

// tag::create-archive-with-base-plugin-example[]
plugins {
    id 'base'
}

version = "1.0.0"

tasks.register('packageDistribution', Zip) {
    from(layout.buildDirectory.dir("toArchive")) {
        exclude "**/*.pdf"
    }

    from(layout.buildDirectory.dir("toArchive")) {
        include "**/*.pdf"
        into "docs"
    }
}

// tag::create-archive-with-base-plugin-example[]
plugins {
    base
}

version = "1.0.0"

tasks.register<Zip>("packageDistribution") {
    from(layout.buildDirectory.dir("toArchive")) {
        exclude("**/*.pdf")
    }

    from(layout.buildDirectory.dir("toArchive")) {
        include("**/*.pdf")
        into("docs")
    }
}

    }
    into(layout.buildDirectory.dir("toArchive"))
}
// end::copy-directory-including-itself-example[]

// tag::create-archive-example[]
tasks.register<Zip>("packageDistribution") {
    archiveFileName = "my-distribution.zip"
    destinationDirectory = layout.buildDirectory.dir("dist")

    from(layout.buildDirectory.dir("toArchive"))
}
// end::create-archive-example[]

// tag::rename-on-copy-example[]

    @Rule
    Sample sample = new Sample(testDirectoryProvider)

    @UsesSample("files/copy")
    def "can archive a directory with #dsl dsl"() {
        given:
        def dslDir = sample.dir.file(dsl)
        executer.inDirectory(dslDir)
        def archivesDir = dslDir.file("build/toArchive")
        archivesDir.createDir().file("my-report.pdf").touch()
        archivesDir.createDir().file("numbers.csv").touch()