Library Required for Interrupts and Timer2 with Interrupt routine

Hello

I require the library for Interrupts and Timer2 as I have to use the Interrupt routine of Timer 2 to wake up my Arduino. Can anyone please share a link for the avr/interrupt.h and Timer2 Interrupt ?

Go here: http://arduino.cc/en/Main/Software

Click on 'source' under Download, then you have everything.