test program:

import std.stdio;
import core.sys.freebsd.config;
import core.sys.freebsd.sys.event;

void main(string[] args) {
    writefln("FreeBSD_version = %s", __FreeBSD_version);
    writefln("sizeof(kevent_t) = %s", kevent_t.sizeof);
}

output:

@bsd:~/d> ./freebsdver
FreeBSD_version = 1104000
sizeof(kevent_t) = 32

@bsd:~/d> uname -K
1300139

/usr/include/d/dmd/core/sys/freebsd/sys/event.h do contain correct definition of kevent_t for versions 12+ (with ulong[4] ext field), but because of wrong kernel version size of kevent_t is also incorrect.

On Sunday, 19 December 2021 at 09:49:29 UTC, eugene wrote:

import std.stdio;
import core.sys.freebsd.config;
import core.sys.freebsd.sys.event;

void main(string[] args) {
    writefln("FreeBSD_version = %s", __FreeBSD_version);
    writefln("sizeof(kevent_t) = %s", kevent_t.sizeof);
}

@bsd:~/d> ./freebsdver
FreeBSD_version = 1104000
sizeof(kevent_t) = 32

@bsd:~/d> uname -K
1300139

I don't have FreeBSD and I can't check the output and header files myself but from what you are saying this seems to me as a bug. I would recommend you to file an issue just so the developers themself can notice it. We have nothing to loss in any case

On Monday, 20 December 2021 at 21:19:43 UTC, rempas wrote:

I have it VirtualBox

Ok.

On Monday, 20 December 2021 at 21:19:43 UTC, rempas wrote:

filed an issue, see
https://issues.dlang.org/show_bug.cgi?id=22615

On Tuesday, 21 December 2021 at 10:28:15 UTC, eugene wrote:

Nice! Hope they see and fix it soon! Love for open source Operating Systems!!

On Tuesday, 21 December 2021 at 10:28:15 UTC, eugene wrote:

Please add which compiler(s) you have tried in the bug report.

I think the fix is needed here: https://github.com/dlang/dmd/blob/ad8412530e607ffebec36f2dbdff1a6f2798faf7/src/dmd/target.d#L362-L372

-Johan

On Tuesday, 21 December 2021 at 17:00:06 UTC, Johan wrote:

Yeah, you are right! Please eugene use LDC2 and check confirm that the behavior is the same there.

Yeah, I think it is very clear as there is no case for FreeBSD 13. So probably this will be easily fixed

On Tuesday, 21 December 2021 at 17:32:44 UTC, rempas wrote:

I have. Same picture.

Yes, one need to let compiler see actual OS version.
I just do not know how to do it and do it correctly.

On Tuesday, 21 December 2021 at 17:32:44 UTC, rempas wrote:

Phobos that shipped with LDC, does not have core.sys.freebsd.config
So

import std.stdio;
//import core.sys.freebsd.config;
import core.sys.freebsd.sys.event;

void main(string[] args) {
//        writefln("FreeBSD_version = %s", __FreeBSD_version);
        writefln("sizeof(kevent_t) = %s", kevent_t.sizeof);
}

and

@bsd:~/d> ldc2 freebsdver.d
@bsd:~/d> ./freebsdver
sizeof(kevent_t) = 32

As you see, sizeof struct kevent_t is also wrong, must be 64:

exerpt from /usr/include/sys/event.h

struct kevent {
        __uintptr_t     ident;          // identifier for this event
        short           filter;         // filter for event
        unsigned short  flags;          // action flags for kqueue
        unsigned int    fflags;         // filter flag value
        __int64_t       data;           // filter data value
        void            *udata;         // opaque user data identifier
        __uint64_t      ext[4];         // extensions
};

#if defined(_WANT_FREEBSD11_KEVENT)
// Older structure used in FreeBSD 11.x and older.
struct kevent_freebsd11 {
        __uintptr_t     ident;          // identifier for this event
        short           filter;         // filter for event
        unsigned short  flags;
        unsigned int    fflags;
        __intptr_t      data;
        void            *udata;         // opaque user data identifier
};
#endif

I would love to see more full (and correct) support for FreeBSD, OpenBSD and DragonflyBSD from Dlang! Maybe one day..