[Spice_discussion] Porting SPICE Fortran program from Mac PowerPC to Mac Intel

William Thompson William.T.Thompson at nasa.gov
Tue Nov 25 08:30:07 PST 2008


I've been running the attached SPICE Fortran program for some years now without 
problem on a Mac OSX PowerPC platform.  I recently tried to port it to the Mac 
Intel platform.  It seemed to compile and run okay, but when I examined the 
values, I found that it gave a completely different answer from that on older 
PowerPC platform.  Can anybody suggest why that should be?

The program was compiled with

ifort -C -o cksmooth -assume byterecl cksmooth.f \
	/service/stereo3/stereo/software/spice_fortran/i386/lib/support.a \

The "-assume byterecl" was based on an examination of the compilation program 
for the source library.  However, I also tried it with this keyword off, and it 
didn't seem to make a difference.

I also tried "-real-size 32 -double-size 64", but that didn't seem to help either.

Thanks for any help you can give me,

Bill Thompson

William Thompson
NASA Goddard Space Flight Center
Code 671
Greenbelt, MD  20771

William.T.Thompson at nasa.gov

(Note changed email address)
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