The __WINE__ macro does not identify the Wine platform

[Roderick Colenbrander]

On Fri, Jun 18, 2010 at 6:43 PM, Austin English <austinenglish at gmail.com> wrote:
> On Fri, Jun 18, 2010 at 11:37 AM, Alan W. Irwin
> <irwin at beluga.phys.uvic.ca> wrote:
>>> If what you want is to add workarounds for Wine in your code, then
>>> neither __WINE__ nor the build platform matter. What matters is the
>>> platform your code is currently running on, which should be detected at
>>> run-time.
>>
>> Excellent point.  After my previous post, I thought some more about this
>> whole issue, and if you detected Wine at compile time and built in different
>> behaviour for that platform (say to work around a Wine issue), then that
>> application could be potentially crippled on Microsoft Windows if you ran it
>> there.  I am pretty sure I would have gone on to the idea of run-time
>> detection, but I hadn't done so yet so thanks for that!
>>
>> Which leads to a Wine newbie question.  What is the best way to detect the
>> Wine
>> platform at run time?
>
> Doing so is discouraged. As you pointed out earlier, if you workaround
> a wine bug in your application on wine, it may break on windows.
> Similarly, if/when the wine bug is fixed, your application may break
> similarly. If you do use such workarounds, be sure to give the user a
> way to workaround it (see, for example, utorrent, which allows
> enabling/disabling the hacks in its preferences).
>
> To answer your question, though, you could check for wine specific
> exports in ntdll, e.g., NTDLL_wine_get_version. Keep in mind that
> doing so is unsupported, may break in the future, etc.
>
> --
> -Austin

The best thing you can do is when you discover differences in behavior
is to submit a bug report to bugzilla. Even better would be to write a
small test case showing the difference that way it might get fixed
quickly (even better would be to fix the bug in Wine yourself if it is
an easy one).

If you want to detect Wine. An easy way is to check for Wine specific
registry keys (not the most reliable one though since someone could
have the same keys on Windows though unlikely). Another way is to
check for wine specific functions like 'wine_get_unix_file_name' in
kernel32.

Roderick