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From: Sam Steingold <sds AT gnu DOT org>
To: cygwin AT cygwin DOT com, JonY <jon_y AT users DOT sourceforge DOT net>
Subject: Re: i686-w64-mingw32-gcc & ntifs.h
In-Reply-To: <4E5229ED.9050805@users.sourceforge.net> (JonY's message of "Mon,	22 Aug 2011 18:05:33 +0800")
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Date: Mon, 22 Aug 2011 17:13:03 -0400
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> * JonY <wba_l AT hfref DOT fbheprsbetr DOT arg> [2011-08-22 18:05:33 +0800]:
>
> On 8/22/2011 09:26, Sam Steingold wrote:
>>> * Kai Tietz <xgvrgm70-tZ/Lr1R23zjA+OdD9eORHt AT choyvp DOT tznar DOT bet> [2011-08-20 09:31:47 +0200]:
>>> 2011/8/20 JonY <jon_y-Rn4VEauK+AKRv+LV9MX5uipxlwaOVQ5f AT public DOT gmane DOT org>:
>>>>> /usr/i686-w64-mingw32/sys-root/mingw/include/ddk/ntddk.h:2922:26:
>>>>> error: redeclaration of enumerator `WinRestrictedCodeSid'
>>>>> /usr/i686-w64-mingw32/sys-root/mingw/include/winnt.h:2681:413: note:
>>>>> previous definition of `WinRestrictedCodeSid' was here
>>>>>
>>>>> what about those?
>>>>>
>>>>
>>>> afaik, you aren't supposed to use use winnt.h and ntddk code together,
>>>> but I'm not sure this is accidental, I'll try to the devs and see if
>>>> they have something.
>>>>
>>>
>>> winnt.h is platform header part.  For DDK you should use AFAIR ntdef.h
>>> and/or wdm.h instead.

so, which one - ntdef or wdm?
let me be clear - the only thing I need ddk for is NtQueryInformationFile.

>> somehow my users who use mingw with msys can include winnt.h and
>> ntddk/ntifs.h while I (who uses cygwin with i686-w64-mingw32-gcc)
>> cannot.
>
> This is one of the difference between mingw.org and mingw-w64, the
> latter follows MSVC more closely.
>
> The ddk headers themselves are mostly from ReactOS (which also follows
> MSVC closely), so its not easy to change its behavior to follow mingw.org.

Sorry, let me get it straight.
Are you saying that my problems are the "correct msvc behavior" and the
lack thereof in mingw/msys is an illegal leniency?
IOW, I should _NOT_ expect cygwin/mingw to ever do what I want (i.e.,
include both ntifs and winnt)?

On the other hand, there is this winternl.h file (on cygwin but not on
msys/mingw) which declares NtQueryInformationFile.
Maybe I should use use it on cygwin and ntifs on mingw/msys?

PS. Why are cygwin/mingw and msys/mingw so different?
which is "correct"? which is "better"?
will they ever converge?
thanks.

-- 
Sam Steingold (http://sds.podval.org/) on CentOS release 5.6 (Final) X 11.0.60900031
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