The __WINE__ macro does not identify the Wine platform

[Austin English]

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