[news.eclipse.platform.rcp] 3.1RC1 How are OS Fragments being handled no

[Chris Longfield <clongfield@xxxxxxxxxxxx>]

Sorry for the cross-post from platform; it ocurred to me this newsgroup might be 
more interested in this sort of thing.

I have an RCP build I am moving from 3.0.1 to 3.1

I am getting:
 : org.eclipse.core.runtime.CoreException: Unable to find plug-in: 
org.eclipse.swt.gtk_0.0.0. Please check the error log for more details.

The old plugin directory used to be org.eclipse.swt.gtk_<version> and now the 
plugin comes as a jar called org.eclipse.swt.gtk.linux.x86_<version>.jar

Looking into the jar, I also see that there is no longer a fragment.xml, and I 
can't really find where the id is defined for this piece, so:
a) Is this right?
a.1) If so, how are these fragments being dealt with now?
b) How do I figure out the plugin id?
c) How do I refer to the fragment I want in my build? (I build for both linux 
and windows)

Chris