I'm filing a series of bugs against those packages that support X compositing to get added a new 'xcomposite' use flag. The use flag enables/disables the compositing manager at compile time and adds libXcomposite and libXdamage to the dependencies if they're needed.
Created attachment 76611 [details, diff] kwin-3.5.0.patch add support for the xcomposite use flag to the kwin-3.5.0 ebuild
This actually requires more work, as there's no --disable-kompmgr on configure (don't invent the parameters if you don't know if they exists). But I'm going to check if it's feasible to patch it.
xcomposite useflag added, and kdebase/kwin patched to add the requested configure switch. Patch also applied upstream.
Thank you very much. (In reply to comment #2) > This actually requires more work, as there's no --disable-kompmgr on configure > (don't invent the parameters if you don't know if they exists). > But I'm going to check if it's feasible to patch it. la prossima volta prometto di riavviare kde dopo aver attivato le opzioni nel centro di controllo...