Frederick Klauschen wrote: > Hi, > > I would like to use gfortran in 64 bit mode, but I > couldn't find any compiler option that enables it. > Doing > gfortran -m64 ... > doesn't produce a 64 bit program (on Xeon/SuSE 10.1 > x86_64). > You're mighty short on information here. Did you install a 32-bit only gfortran from some source evident only to you? How about trying a gfortran x86_64 according to advice on gfortran wiki, if you don't want to build it yourself?