On Wednesday 21 May 2008 5:42:09 pm Wen-Yen Chuang wrote: > Gonéri Le Bouder wrote: > > I saw your question about the .a too late. Can you contact upstream > > (and Cc: the list) to know if they planted to release a shared lib one > > day. > > Upstream author of Bullet suggests using forum instead of e-mail. > I browsed the forum and list answers from upstream below: > (For the list, I am talking about ITP: #476284). > > Erwin (upstream author of Bullet) wrote: > > Bullet is not meant as a system-wide library. > > The behaviour changes with different versions, > > and you don't want a new version of a .dll/.so change and > > break existing other applications that use Bullet. > > > > The manual tells how to use Bullet: simply add the Bullet/src folder > > to your project, compile, link and run your application. > > Please use static linked library, just like the Bullet demos do. > > > > Each project (Blender, Bullet demos, other) has its own version of > > Bullet/src embedded. I choose this on purpose: different versions of > > Bullet physics will have (slightly) different simulation behaviour. > > And once a game or app is tuned, you don't want to upgrade the physics > > anymore, it would break everything. > > > > At the moment, all C++ classes are directly exposed to the developer, > > so he/she can use and extend them in any way. Such a rich C++ interface > > doesn't suit a shared / dynamic library very well I think. > > There is plans for an optional C-API, and it would be easier to expose > > the Bullet library with such C-API as shared library. > > But someone will need to go through the trouble of adding > > additional/optional support for such shared library build setting > > (either for C++ or C API). > > It is possible to provide .so, and it is proved to be working. > However, maintainers have to handle all the ABI changes and select > suitable so versioning. Upstream of Bullet does not support shared > libraries currently. > > Do we have to provide .so? > Or just provides .a, like what upstream suggests? > > Bullet includes some nice demo programs, it is worthy to be debianized > even if we do not provide shared libraries. > > Kind regards > Wen-Yen Chuang (caleb) > > -- > My GPG key is signed by Debian Developer Masayuki Hatta. If you provide a shared library, be sure to use a release type soname scheme (libbullet-<version>.so). Look at ogre for an example. -- Regards, Andres
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