Please add riscv64 FreeBSD support code

[clausecker]

Trying to compile github.com/ferama/rospo on riscv64 FreeBSD 13.1.

github.com/creack/pty
# github.com/creack/pty
vendor/github.com/creack/pty/pty_freebsd.go:53:20: undefined: fiodgnameArg
vendor/github.com/creack/pty/pty_freebsd.go:66:12: undefined: _C_SPECNAMELEN
vendor/github.com/creack/pty/pty_freebsd.go:69:9: undefined: fiodgnameArg

go version says go version go1.20 freebsd/riscv64

Please add the missing code.

[adamnyc12]

github.com/creack/pty

github.com/creack/pty

vendor/github.com/creack/pty/pty_freebsd.go:53:20: undefined: fiodgnamearg
vendor/github.com/creack/pty/pty_freebsd.go:66:12: undefined: _c_specnamelen
vendor/github.com/creack/pty/pty_freebsd.go:69:9: undefined: fiodgnamearg

[clausecker]

Here's the result of running go tool cgo -godefs types_freebsd.go on a riscv64-freebsd machine if that helps:

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

package pty

const (
        _C_SPECNAMELEN = 0xff
)

type fiodgnameArg struct {
        Len     int32
        Buf     *byte
}

[creack]

Closed by #168

[clausecker]

Hm weird, the file you committed has a different value for _C_SPECNAMELEN.