After creating a new Wind River project (Simple Robot Template) I see that mlongcall is already appended to the build parameters. If all else fails you could try creating a new Wind River project and just copy the cpp/h files from one directory into the newly created project in your workspace. Then right click, refresh in the project treeview in Wind River Workbench and all of the cpp files should build from then on. You will have to copy the code from the main robot class but at least you'll have the latest project settings.
Also you should update to image 28...
http://www.usfirst.org/uploadedFiles..._Update_12.pdf