Example to test pkg/matrix Instructions for building: 1) mkdir build 2) cd build 3) run genmake with: -mods=../code and -enable=matrix e.g., ../../../tools/genmake2 "-mods=../code" "-optfile=../../../tools/build_options/darwin_ppc_xlf_spk" "-enable=matrix" 4) make depend 5) make Instructions for running: 1) mkdir run 2) cd run 3) cp -p ../input/* . 4) ./mitgcmuv > output.txt Results: compare with results/output.txt