android - google-play-services_lib.jar missing after updating to latest version (3.1) -

i've been using google play services in app while no prob. i'm using eclipse. i've updated play services(and adt , sdk) latest version after i/o , can not app build. have added google-play-services_lib project app library project. when go java build path project red x next google-play-services_lib under android dependencies. looking in /bin/ dir google-play-services_lib.jar, never build. run issue?

converting comment answer

after updating android sdk , adt make sure have android build tools installed.

goto android sdk manager check if andorid build tools installed. if not installed install same.