/usr/bin/ld: raccel_sfcn_utils.o: undefined reference to symbol 'dlclose@@GLIBC_2.2.5'

I get the following message when starting a simulation in rapid acceleration mode under Ubuntu Xenial 64 Bit which works under Windows 7 64 Bit:

 gcc  -o mymdl mymdl.o mymdl_capi.o mymdl_data.o mymdl_tgtconn.o rtGetInf.o rtGetNaN.o rt_logging.o rt_logging_mmi.o rt_nonfinite.o rt_stopexec.o rtw_modelmap_utils.o ext_svr.o updown.o ext_work.o rtiostream_interface.o rtiostream_tcpip.o raccel_sup.o raccel_mat.o simulink_solver_api.o common_utils.o raccel_utils.o raccel_sfcn_utils.o raccel_main.o rtiostream_utils.o    \
     /opt/MATLAB/R2016b/bin/glnxa64/libmwcoder_target_services.so /opt/MATLAB/R2016b/bin/glnxa64/libmwcoder_ToAsyncQueueTgtAppSvc.so /opt/MATLAB/R2016b/bin/glnxa64/libmwcoder_ParamTuningTgtAppSvc.so  -Wl,-rpath,/opt/MATLAB/R2016b/bin/glnxa64,-L/opt/MATLAB/R2016b/bin/glnxa64 -Wl,-lmwsl_solver_rtw -Wl,-lmwsl_fileio -Wl,-lmwsl_services -Wl,-lmwsigstream -Wl,-lmat,-lmx,-lmex,-lut,-lmwmathutil -L/opt/MATLAB/R2016b/bin/glnxa64 -lmwipp -lpthread -lmwsl_log_load_blocks -lfixedpoint -lmwsl_AsyncioQueue -lmwsl_iofile -lmwsl_simtarget_instrumentation   -lm
/usr/bin/ld: raccel_sfcn_utils.o: undefined reference to symbol 'dlclose@@GLIBC_2.2.5'
//lib/x86_64-linux-gnu/libdl.so.2: error adding symbols: DSO aus der Kommandozeile fehlt
collect2: error: ld returned 1 exit status
gmake: *** [ibs] Error 1

Any suggestions?