Some POSIX types are missing on FreeBSD

[jbeich]

I'm trying to build river but it fails due to missing POSIX types often used by C libraries.

$ zig version
0.7.1+830bc41b1

$ cat test.zig
const std = @import("std");

pub fn main() anyerror!void {
    const foo = extern struct {
        dev: os.dev_t,
        server_start: std.os.time_t,
    };
}

$ zig build-exe test.zig
./test.zig:5:20: error: container 'std.os' has no member called 'dev_t'
        dev: std.os.dev_t,
                   ^
./test.zig:6:29: error: container 'std.os' has no member called 'time_t'
        server_start: std.os.time_t,
                            ^

struct stat seems to use plain type

zig/lib/std/os/bits/freebsd.zig

Line 124 in c99c6c0

dev: u64,

Compare with NetBSD:

zig/lib/std/os/bits/netbsd.zig

Line 13 in c99c6c0

pub const dev_t = u64;

zig/lib/std/os/bits/netbsd.zig

Line 22 in c99c6c0

pub const time_t = i64;

zig/lib/std/os/bits/netbsd.zig

Line 157 in c99c6c0

dev: dev_t,