In order to enable building of the additional libraries supply the following options to the configure script:
--enable-BMWlibs (for libTFitPofB libLFRelaxation libGapIntegrals libCalcMeanFieldsLEM)
--enable-ASlibs (for libPNL_PippardFitter)
By default, both options are disabled.
At the moment I have tested it only in an SL5 32-bit environment.
Further tests are going to follow.
For a clean installation I suggest to remove any musrfit and plug-in installations before newly building musrfit.