def config(self):
        settings = {
            # Use SYSTEMMPI since openfoam-org doesn't have USERMPI
            'mplib': 'SYSTEMMPI',

            # Add links into bin/, lib/ (eg, for other applications)
            'link': False,
        }
        # OpenFOAM v2.4 and earlier lacks WM_LABEL_OPTION
        if self.spec.satisfies('@:2.4'):
            settings['label-size'] = False
        return settings