In bash:
ispc -O2 ispc_sqrt_task.ispc -o ispc_sqrt_task.o -h ispc_sqrt_task.h --pic
g++ tasksys.cpp -O3 -Wall -m64 -c -o tasksys.o -fPIC

Then, in MATLAB:
mex ispc_sqrt_task_mex.cpp ispc_sqrt_task.o tasksys.o
