http://d.puremagic.com/issues/show_bug.cgi?id=5570


Jonathan M Davis <jmdavisProg@gmx.com> changed:

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--- Comment #9 from Jonathan M Davis <jmdavisProg@gmx.com> 2012-04-10 10:11:53 PDT ---
>  If bug preventing almost any x64 D code interconnecting with C libs is not a
> blocker, I can hardly imagine what is.

I don't know how Walter decides that sort of thing or how he treats blockers. I believe that the worse that we normally see is critical. But this is something which has _never_ worked, and it's in a newer feature - 64-bit code generation - and it's something that not everyone is using. So, something which was in D itself (as opposed to how it talks with C code) which used to work but doesn't now could certainly be more of a blocker than this, depending on what it was. But in general, 64-bit specific stuff is less critical in that it only affects those using 64-bit rather than _everyone_ like many bugs do.

I would actually expect Walter to consider this critical rather than a blocker. Certainly, if blocker indicates that something should block a release, this isn't it, since the bug has been around for as long as dmd's 64-bit code generation has been. But that's up to him.

Regardless, this is a huge issue, and it should probably be treated as a higher priority than it has been, but much of what _has_ been being worked on is high priority stuff which affects much more D code than this does, so I suppose that it's not all that surprising that Walter hasn't gotten around to this yet. Still, I'd hope that this would be taken care of sooner rather than later.

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--- Comment #10 from Mihail Strashun <m.strashun@gmail.com> 2012-04-11 04:23:31 PDT ---
(In reply to comment #9)
> So, something which was in D
> itself (as opposed to how it talks with C code) which used to work but doesn't
> now could certainly be more of a blocker than this,

My point exactly is that interfacing to C broken at ABI level is much more important than any inside language issue. Regressions are more important, yes, but, well, there is an importance level "regression" before "blocker" exactly for them. I'd say it is in the same category as "wrong code generation" for basic language constructs. It is something you rarely expect from even the new language when facing problems, something rather hard to identify and something almost any desktop D user is doomed to meet when try to build something usable ( as most usable programs tend to involve C bindings at this stage of std lib ).

Issue a warning that it can happen when compiling extern(C) stuff of x64 at
least.

tl;dr : it is really bad for marketing

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--- Comment #11 from Jonathan M Davis <jmdavisProg@gmx.com> 2012-04-11 09:51:04 PDT ---
In general, something which has never worked is going to be treated as less of a priority than something which worked before and doesn't now - _especially_ when it's part of a newer feature. And this has _never_ worked correctly. And I don't know why you would think that a C ABI issue would be more important than an issue in D itself. As bad as this is, most D code is completely unaffected by this. It's only once you start dealing with C and structs that it matters.

Now, why Walter hasn't this considered a high enough priority to fix it yet, I don't know. This is clearly a serious bug, and I would have thought that he would have made it a fairly high priority once he figured out that it was a problem, but for whatever reason, he hasn't. There are plenty of other high priority issues that he's been working on though - many of which have been around much longer than this. Still, one would hope that this wouldn't languish much longer. It's a major impedement to using 64-bit on D projects.

By the way, for those that this is actually preventing from using 64-bit dmd and who really need it, gdc probably doesn't have this problem, since it relates to code generation. So, you could try that while waiting for Walter to get around to this.

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Leandro Lucarella <leandro.lucarella@sociomantic.com> changed:

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--- Comment #12 from Leandro Lucarella <leandro.lucarella@sociomantic.com> 2012-04-16 03:27:08 PDT ---
(In reply to comment #11)
> In general, something which has never worked is going to be treated as less of a priority than something which worked before and doesn't now - _especially_ when it's part of a newer feature.

Yeah, and you know that something that worked before and doesn't work now is exactly what's called a *regression*, which have higher priority than *blocker*.

So we all agree on that :)

> And this has _never_ worked correctly. And I
> don't know why you would think that a C ABI issue would be more important than
> an issue in D itself. As bad as this is, most D code is completely unaffected
> by this. It's only once you start dealing with C and structs that it matters.

And that is a lot of codebase, you know? For example wxD, as Damian Ziemba pointed out can't work without this fixed. Also, and probably much less important than wxD, is making life at the company I work a little miserable trying to migrate to 64bit with this bug around. AFAIK Walter cares about big projects as wxD and making D usable for companies to consider this bug a blocker when it really blocks that kind of uses.

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Johan Hernandez <thepumpkin1979@gmail.com> changed:

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--- Comment #13 from Johan Hernandez <thepumpkin1979@gmail.com> 2012-04-25 11:19:32 PDT ---
This is definitely a blocker, please fix this, this is a huge issue on OSX too.

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James Miller <james@aatch.net> changed:

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--- Comment #14 from James Miller <james@aatch.net> 2012-05-03 01:13:16 PDT ---
Throwing my vote in for this one, this is pretty much stopping me from using DMD64 for my C bindings. For the record, LDC works in this case.

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--- Comment #15 from github-bugzilla@puremagic.com 2012-05-07 12:29:35 PDT ---
Commit pushed to dmd-1.x at https://github.com/D-Programming-Language/dmd

https://github.com/D-Programming-Language/dmd/commit/246f737c0f246f0b89ee27bfb611965e64f611ac start on fixing issue 5570 64 bit ABI

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--- Comment #15 from github-bugzilla@puremagic.com 2012-05-07 12:29:35 PDT ---
Commit pushed to dmd-1.x at https://github.com/D-Programming-Language/dmd

https://github.com/D-Programming-Language/dmd/commit/246f737c0f246f0b89ee27bfb611965e64f611ac start on fixing issue 5570 64 bit ABI

--- Comment #16 from github-bugzilla@puremagic.com 2012-05-07 12:29:45 PDT ---
Commit pushed to master at https://github.com/D-Programming-Language/dmd

https://github.com/D-Programming-Language/dmd/commit/f1039b341f2798f176dcf3c34019682d413ea863 start on fixing issue 5570 64 bit ABI

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--- Comment #17 from Johan Hernandez <thepumpkin1979@gmail.com> 2012-05-07 12:40:48 PDT ---
I'm very happy to see some commits on this issue, this is really important!!! Walter++!!!

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Don <clugdbug@yahoo.com.au> changed:

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--- Comment #18 from Don <clugdbug@yahoo.com.au> 2012-05-23 01:18:18 PDT ---
Another commit towards this issue:

https://github.com/D-Programming-Language/dmd/commit/29eb972a2f329276a72a19e722671ff26bfe8534

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