log.Fatalf("ARM64 external linker must be gold (issue #15696, 22040), but is not: %s", out)
				}
			}
		}
	}
	if ctxt.Arch.Family == sys.ARM64 && buildcfg.GOOS == "freebsd" {
		// Switch to ld.bfd on freebsd/arm64.
		altLinker = "bfd"

		// Provide a useful error if ld.bfd is missing.
		name, args := flagExtld[0], flagExtld[1:]
		args = append(args, "-fuse-ld=bfd", "-Wl,--version")

// mkerrors.sh
// Code generated by the command above; see README.md. DO NOT EDIT.

//go:build arm && freebsd

// Code generated by cmd/cgo -godefs; DO NOT EDIT.
// cgo -godefs -- _const.go

package unix

import "syscall"

const (
	AF_APPLETALK                   = 0x10
	AF_ARP                         = 0x23
	AF_ATM                         = 0x1e
	AF_BLUETOOTH                   = 0x24
	AF_CCITT                       = 0xa

// mkerrors.sh -m64
// Code generated by the command above; see README.md. DO NOT EDIT.

//go:build arm64 && freebsd

// Code generated by cmd/cgo -godefs; DO NOT EDIT.
// cgo -godefs -- -m64 _const.go

package unix

import "syscall"

const (
	AF_APPLETALK                   = 0x10
	AF_ARP                         = 0x23
	AF_ATM                         = 0x1e
	AF_BLUETOOTH                   = 0x24
	AF_CCITT                       = 0xa

// mkerrors.sh -m64
// Code generated by the command above; see README.md. DO NOT EDIT.

//go:build amd64 && freebsd

// Code generated by cmd/cgo -godefs; DO NOT EDIT.
// cgo -godefs -- -m64 _const.go

package unix

import "syscall"

const (
	AF_APPLETALK                   = 0x10
	AF_ARP                         = 0x23
	AF_ATM                         = 0x1e
	AF_BLUETOOTH                   = 0x24
	AF_CCITT                       = 0xa

// mkerrors.sh -m64
// Code generated by the command above; see README.md. DO NOT EDIT.

//go:build riscv64 && freebsd

// Code generated by cmd/cgo -godefs; DO NOT EDIT.
// cgo -godefs -- -m64 _const.go

package unix

import "syscall"

const (
	AF_APPLETALK                   = 0x10
	AF_ARP                         = 0x23
	AF_ATM                         = 0x1e
	AF_BLUETOOTH                   = 0x24

// mkerrors.sh -m32
// Code generated by the command above; see README.md. DO NOT EDIT.

//go:build 386 && freebsd

// Code generated by cmd/cgo -godefs; DO NOT EDIT.
// cgo -godefs -- -m32 _const.go

package unix

import "syscall"

const (
	AF_APPLETALK                   = 0x10
	AF_ARP                         = 0x23
	AF_ATM                         = 0x1e
	AF_BLUETOOTH                   = 0x24
	AF_CCITT                       = 0xa

	tg.grepStdout("darwin arm64", "unexpected GOOS/GOARCH combination")
}

func TestGoEnv(t *testing.T) {
	tg := testgo(t)
	tg.parallel()
	defer tg.cleanup()
	tg.setenv("GOOS", "freebsd") // to avoid invalid pair errors
	tg.setenv("GOARCH", "arm")
	tg.run("env", "GOARCH")
	tg.grepStdout("^arm$", "GOARCH not honored")

	tg.run("env", "GCCGO")
	tg.grepStdout(".", "GCCGO unexpectedly empty")

[[kotdsl:prerequisites]]
== Prerequisites

* The embedded Kotlin compiler is known to work on Linux, macOS, Windows, Cygwin, FreeBSD and Solaris on x86-64 architectures.

//
// On all platforms, the traceback function is invoked when a call from
// Go to C to Go requests a stack trace. On linux/amd64, linux/ppc64le,
// linux/arm64, and freebsd/amd64, the traceback function is also invoked
// when a signal is received by a thread that is executing a cgo call.
// The traceback function should not make assumptions about when it is