To compile an application that calls the functions in the scalar, SIMD, or vector MASS libraries, specify mass, and/or one of mass_simdp7, mass_simdp8, and/or one of massv, massvp3, massvp4, massvp5, massvp6, massvp7, massvp8 on the -l linker option.
xlc -qarch=pwr8 progc.c -o progc -lmass -lmassvp8
xlc -qarch=pwr8 progc.c -o progc -lmass_simdp8