how to build on AIX power 7

[2horns]

Folks,

does anybody have any lead on how to build cp2k (v21) on power 7, AIX
v6.1?

I get some weird error messages:
===== Routine Calling Stack =====

            9 pw_create
            8 pw_pool_create_pw
            7 density_rs2pw
            6 calculate_rho_elec
            5 qs_rho_update_rho
            4 scf_env_initial_rho_setup
            3 init_scf_run
            2 qs_energies_scf
            1 CP2K
 CP2K| condition FAILED at line 236
 CP2K| Abnormal program termination, stopped by process number 0

The above was for O2.inp from the test suite.

Thx a bunch,
H.