Please visit Official site (http://omni-compiler.org).
   or
run the following command.
$ git clone --recursive https://github.com/omni-compiler/omni-compiler.git

$ ./configure --prefix=(INSTALL PATH)
$ make
$ make install
$ export PATH=(INSTALL PATH)/bin:$PATH

$ xmpcc  -O2 test.c   -o test
$ xmpf90 -O2 test.f90 -o test

$ mpirun -np 4 ./test

$ ./configure --prefix=(INSTALL PATH) --enable-openacc --with-cuda=(CUDA PATH) --with-gpu-cflags="-arch=sm_35 -O2"
$ make
$ make install
$ export PATH=(INSTALL PATH)/bin:$PATH

OpenACC
$ ompcc -acc -O2 test.c -o test --device=Kepler
OpenMP(task offload)
$ ompcc -O2 test.c -o test --device=Kepler

$ ./test