Windriver actually is a proprietary offshoot of Eclipse - albeit a rather poor one. I know people have ported the Netbeans plugins over to Eclipse to use with Java but I haven't heard about anyone using vanilla Eclipse with C++. This is the best I could find, and I have no idea whether it's still active or not since the project is over a year old:
http://www.chiefdelphi.com/forums/sh...ad.php?t=91428