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Message-ID: <517ADF9C.4000606@cwilson.fastmail.fm>
Date: Fri, 26 Apr 2013 16:12:12 -0400
From: Charles Wilson <cygwin AT cwilson DOT fastmail DOT fm>
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To: cygwin AT cygwin DOT com
Subject: Attn: JonY -- Re: Bug in ddk headers when used from cygwin
References: <51625CAE DOT 2030703 AT cwilson DOT fastmail DOT fm> <20130408074801 DOT GA10199 AT calimero DOT vinschen DOT de> <51630442 DOT 4080805 AT cwilson DOT fastmail DOT fm> <20130409091609 DOT GI10126 AT calimero DOT vinschen DOT de> <51641548 DOT 2060700 AT cwilson DOT fastmail DOT fm> <20130409135842 DOT GC15271 AT calimero DOT vinschen DOT de>
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Hey, JonY ---

On 4/9/2013 9:58 AM, Corinna Vinschen wrote:
> On Apr  9 09:19, Charles Wilson wrote:
>> On 4/9/2013 5:16 AM, Corinna Vinschen wrote:
>>> On Apr  8 13:54, Charles Wilson wrote:
>>>> But doesn't this mean that the cygwin's w32api package should
>>>> exclude all of the ddk headers; it's not simply a case that you
>>>> "shouldn't" use ddk/*.h, but that you actually cannot, because
>>>> compilation will fail.
>>>
>>> The absence of intrin.h was a bug, but otherwise you could still use
>>> the ddk headers for what they are supposed to be:  Writing device
>>> drives and other kernel stuff.  The difference is just that the ddk
>>> headers from mingw-w64 cannot be used together with the user space
>>> headers like windows.h, but that's not different from "upstream".
>>
>> ...but is it reasonable to create a *cygwin* device driver or kernel
>> mode item?  If you're using the cygwin compiler, then you're linking
>> against the cygwin dll -- which makes a bunch of usermode w32 calls
>> under the hood.  If it's bad juju to mix ddk/ kernel mode stuff with
>> w32api/ user mode stuff, then any "cygwin" device driver is, by
>> definition, bad juju.
>>
>> If I'm correct, then the *cygwin* w32api-headers package (and
>> cygwin64-w32api-headers) should exclude ddk/ from their deliverable
>> footprint, even if intrin.h is added back to the toplevel w32api/
>> include directory for other reasons.
>
> Well, actually I don't really care one way or the other.  You may want
> to discuss this with JonY.

Any thoughts on this -- the idea that the cygwin (and cygwin64) package of

    w32api-headers
    w32api-runtime

should be stripped of any ddk-related items, as they can't actually be 
mixed with the usable-from-cygwin user mode w32 items?

Arguably this might break some things -- such as the (old version of) 
csih/getVolInfo -- but they are actually already broken, with the (bug 
or compile failure) just waiting to be exposed.

--
Chuck


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