downlad graphlab

after install graphlab, put assmebly.cpp and CMakeList.txt under graphlab/apps/assembly
then under graphlab/, do ./configure

then
cd graphlab/release/apps/assembly
Put GraphLab_Input.txt under this directory.
Then do
make
./assembly --infile=GraphLab_Input.txt --outfile=output --source=33 --destination=5


Everytime you modify assembly.cpp, you need to do make.