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Subject: Re: Updated: w32api-{headers,runtime}-8.0.0-1 (x86/x86_64)
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From: Ken Brown via Cygwin <cygwin AT cygwin DOT com>
Reply-To: Ken Brown <kbrown AT cornell DOT edu>
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On 9/23/2020 11:21 AM, Brian Inglis wrote:
> On 2020-09-23 08:49, Ken Brown via Cygwin wrote:
>> On 9/23/2020 12:44 AM, Brian Inglis wrote:
>>> On 2020-09-22 22:17, Brian Inglis wrote:
>>>> On 2020-09-22 16:10, Brian Inglis wrote:
>>>>> On 2020-09-18 23:19, JonY via Cygwin-announce wrote:
>>>>>> Now released for both 32bit and 64bit Cygwin:
>>>>>>
>>>>>> w32api-headers-8.0.0-1
>>>>>> w32api-runtime-8.0.0-1
>>>>>>
>>>>>> Based on mingw-w64-v8.0.0.
>>>>
>>>> Sorry, ambigous - to clarify: may be a definition conflict between updated
>>>> headers rebuilding cygwin both 32 and 64 just after latest updates: see
>>>> attached log.
>>>> Cygwin both 32 and 64 builds worked without any problems just before the latest
>>>> updates.
>>>
>>> Tad confusing log messages, but it appears the actual issue may not be a
>>> conflict to do with PVOID, but with PMEM_EXTENDED_PARAMETER between the below:
>>>
>>> $ fgrep -wB12 PMEM_EXTENDED_PARAMETER /usr/include/w32api/winnt.h
>>>     typedef struct DECLSPEC_ALIGN(8) MEM_EXTENDED_PARAMETER {
>>>       __C89_NAMELESS struct {
>>>           DWORD64 Type : MEM_EXTENDED_PARAMETER_TYPE_BITS;
>>>           DWORD64 Reserved : 64 - MEM_EXTENDED_PARAMETER_TYPE_BITS;
>>>       };
>>>       __C89_NAMELESS union {
>>>           DWORD64 ULong64;
>>>           PVOID Pointer;
>>>           SIZE_T Size;
>>>           HANDLE Handle;
>>>           DWORD ULong;
>>>       };
>>>     } MEM_EXTENDED_PARAMETER, *PMEM_EXTENDED_PARAMETER;
>>> $ fgrep -wA8 PMEM_EXTENDED_PARAMETER winsup/utils/cygpath.cc
>>> #define PMEM_EXTENDED_PARAMETER PVOID
>>> #include <windows.h>
>>> #include <userenv.h>
>>> #include <shlobj.h>
>>> #include <ntdef.h>
>>> #include <ntdll.h>
>>>
>>> #include "wide_path.h"
>>> #include "loadlib.h"
>>>
>>> It seems likely that we could perhaps just remove the conflicting #define, but
>>> without some idea of the original intent and its impact, and a good cygpath
>>> regression test suite, that could perhaps be a rash decision.
>>
>> This is related to the extended memory API that Corinna started using last
>> April.  At the time the relevant declarations and definitions weren't in the
>> mingw-w64 headers yet, so Corinna had to do some ad hoc stuff.  Now that they've
>> been added, a lot of that stuff should be removed.  I'll do it later today.
> 
> Thanks Ken,
> Please let me know so I can pull and rebuild cygwin 32 and 64 to test both with
> another cpuinfo update.

I've just sent a fix to cygwin-patches.  I won't push it until someone reviews 
it.  In particular, I'd like to know if my handling of the declaration of 
VirtualAlloc2 seems reasonable.  Among other things, I'm puzzled by the apparent 
need to add WINAPI.  If it's really needed, I don't know how the calls of that 
function could have worked before.  Can anyone enlighten me?

Ken
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