if strcmp(computer,'PCWIN')  mex RT_cdf.c ipmpar.c dcdflib.celse %choose your own compiler flags for gnu -O2 is conservative but it will work...  mex RT_cdf.c ipmpar.c dcdflib.c CFLAGS='$CFLAGS -Wall -O2'  %aggressive compilation by Intel ICC compiler on Linux worked as well (30% faster)  mex /opt/intel/compiler60/ia32/lib/*.a RT_cdf.c ipmpar.c dcdflib.c CC='icc' LD='gcc' CFLAGS='-parallel' ...      COPTIMFLAGS='-ip -xK -O3'end