Re: Fix compilation using mingw.org's MinGW

[Pedro Alves <palves@redhat.com>]

On 4/30/19 6:17 PM, Eli Zaretskii wrote:
>> Cc: gdb-patches@sourceware.org
>> From: Pedro Alves <palves@redhat.com>
>> Date: Tue, 30 Apr 2019 18:03:57 +0100
>>
>> The issue is where is that default set?
> 
> On some internal header file (it differs between various flavors of
> MinGW).  

Right, which is what I said.

> But no matter where it is set, it must be defined after _any_
> standard header is included, so in practice I think it's defined at
> the place where the patch tests for it.

I think you mean "before".  But I did not say that this was the wrong
place (since I was the one that suggested the place).  Only that
pedantically the new code could/should be tweaked like this:

- #ifdef __MINGW32__
+ #if defined (__MINGW32__) || defined (__CYGWIN__)
 # ifdef _WIN32_WINNT
 #  if _WIN32_WINNT < 0x0501
 #   undef _WIN32_WINNT
 #   define _WIN32_WINNT 0x0501
 #  endif
 # else
 #  define _WIN32_WINNT 0x0501
 # endif
 #endif	/* __MINGW32__ */

> 
> In any case, the only platform which really needs this is mingw.org's
> MinGW, where I actually tested this assumption.  The other two,
> MinGW64 and Cygwin, don't support older platforms (they actually don't
> support XP anymore, only Vista and onward), so their default values
> are higher than 0x0501 anyway.
> 

Right, like I said.

Thanks,
Pedro Alves