$CC -o zio metropolis_gibbs.c  ${MC_INSTDIR}/../../gr_code/clock_random.c ${MC_INSTDIR}/../../gr_code/synchrotron/sync_distribution.c -I ${HEADERS_GSL}   -I ${MC_INSTDIR}/../../include/ -I ${HEADERS_MPI} -I ${HEADERS_CFITSIO}  -L ${LIB_GSL}  -lm -lgsl -lgslcblas