(the actual output may differ from what you see here):
</p>

<pre>
$ cat x.go
package main

func main() {
	println(3)
}
$ GOOS=linux GOARCH=amd64 go tool compile -S x.go        # or: go build -gcflags -S x.go
"".main STEXT size=74 args=0x0 locals=0x10
	0x0000 00000 (x.go:3)	TEXT	"".main(SB), $16-0
	0x0000 00000 (x.go:3)	MOVQ	(TLS), CX
	0x0009 00009 (x.go:3)	CMPQ	SP, 16(CX)
	0x000d 00013 (x.go:3)	JLS	67

received from Go. For example:

	package main

	// typedef int (*intFunc) ();
	//
	// int
	// bridge_int_func(intFunc f)
	// {
	//		return f();
	// }
	//
	// int fortytwo()
	// {
	//	    return 42;
	// }
	import "C"
	import "fmt"

	func main() {
		f := C.intFunc(C.fortytwo)
		fmt.Println(int(C.bridge_int_func(f)))
		// Output: 42

<p>
A complete program is created by linking a single, unimported package
called the <i>main package</i> with all the packages it imports, transitively.
The main package must
have package name <code>main</code> and
declare a function <code>main</code> that takes no
arguments and returns no value.
</p>

<pre>
func main() { … }
</pre>

<p>

pkg log/syslog (freebsd-riscv64-cgo), type Writer struct #53466
pkg math (freebsd-riscv64), const MaxInt = 9223372036854775807 #53466
pkg math (freebsd-riscv64), const MaxUint = 18446744073709551615 #53466
pkg math (freebsd-riscv64), const MinInt = -9223372036854775808 #53466
pkg math (freebsd-riscv64-cgo), const MaxInt = 9223372036854775807 #53466
pkg math (freebsd-riscv64-cgo), const MaxUint = 18446744073709551615 #53466

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

// Test installing a signal handler before the Go code starts.
// This is a lot like ../testcshared/main4.c.

#include <setjmp.h>
#include <signal.h>
#include <stdarg.h>
#include <stddef.h>
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <unistd.h>

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/time.h>
#include <sys/select.h>

#include "libgo2.h"

int *nilp;

int main(int argc, char** argv) {
	int verbose;
	int test;

	if (argc < 2) {
		printf("Missing argument\n");
		return 1;
	}

	test = atoi(argv[1]);

	verbose = (argc > 2);

	Noop();

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

// Test preemption.

#include <stdlib.h>

#include "libgo8.h"

int main() {
	GoFunction8();

	// That should have exited the program.
	abort();

// This file is here just to cause problems.
// main.swig turns into a file also named main.go.
// Make sure cmd/go keeps them separate
// when both are passed to cgo.

package main

//int F(void) { return 1; }
import "C"
import (
	"fmt"
	"os"
)

func F() int { return int(C.F()) }

func main() {
	if x := int(C.F()); x != 1 {
		fatal("x = %d, want 1", x)
	}

// Usage:
//
//  checkdwarf <exe> <suffix>
//
// Opens <exe>, which must be an executable or a library and checks that
// there is an entry in .debug_info whose name ends in <suffix>

package main

import (
	"debug/dwarf"
	"debug/elf"
	"debug/macho"
	"debug/pe"
	"fmt"
	"os"
	"strings"
)

func usage() {
	fmt.Fprintf(os.Stderr, "checkdwarf executable-or-library DIE-suffix\n")
}

// Copyright 2017 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 (
	"fmt"
	"os"
	"plugin"
)

func main() {
	p, err := plugin.Open("plugin.so")
	if err != nil {
		panic(err)
	}

	val, err := p.Lookup("Val")
	if err != nil {
		panic(err)
	}
	got := *val.(*string)
	const want = "linkstr"