def __cpu_arch(self):
        """Based on the CPU architecture, set values accordingly.  A user
        specified value overrides any defaults."""

        if hpccm.config.g_cpu_arch == cpu_arch.AARCH64:
            # Bug in the VisIt build config
            self.__arch = 'linux-intel'
        elif hpccm.config.g_cpu_arch == cpu_arch.X86_64:
            self.__arch = 'linux-x86_64'
        else: # pragma: no cover
            raise RuntimeError('Unknown CPU architecture')
Based on the CPU architecture, set values accordingly.  A user
        specified value overrides any defaults.
hpccm/building_blocks/libsim.py