ex1.c: Test star forest communication (PetscSF)\n\n
ex2.c: Test SF cuda stream synchronization in device to host communication\n\n
ex3.c: Test PetscSFFetchAndOp on patterned SF graphs
ex4.c: Test PetscSFFCompose when the ilocal array is not the identity\n\n
ex5.c: Test PetscSFFCompose when the ilocal arrays are not identity nor dense\n\n
makefile