Michael, > uname -a > Linux master 2.6.11.7-suse92-osmp #9 SMP Tue Apr 12 14:19:08 EDT 2005 x86_64 > x86_64 x86_64 GNU/Linux > > Free would certainly be an alternative. Problem is for years I dealt with > Portland compilers and any software I wanted had Makefiles specifically > designed for that compiler so...I guess I never had to do any work and truly > learn the compiling options. Now I find myself a bit lost. I'm told that the freely-available "GCC 4" package from GNU can be built and installed with support for compiling Fortran-90 code. The relevant compiler in that package is "gfortran". The package is available at http://gcc.gnu.org/ If you install and use this package, then you should define the C macro "f2cFortran" when building the UDUNITS package. Regards, Steve Emmerson Ticket Details =================== Ticket ID: GYX-412442 Department: Support UDUNITS Priority: Normal Status: Closed