Cannot Find WProgram.h (differant)

P.S. I don't see that header. Do I need to compile something differantly?

jackie@jackie-Latitude-E6410:~/Development/Code/Arduino/core$ ls
api.txt  build.xml  done.txt     make.sh  preproc     src
bin      core.jar   license.txt  methods  preproc.pl  todo.txt

Jackie