Re: How to recompile software for the N900?
 

Be warned, that takes up a significant part of the rootfs, I'd suggest making a chroot inside MyDocs or /home then installing gcc in that.

Re: How to recompile software for the N900?
 

both gcc-4.4 and gfortran-4.2 and gfortran-4.3 from debian repositories worked in easy debian. Compiled and successfully ran some code. gfortran runs fortran 95. There is a version gfortran-4.4 but I could not get it to work. There was a problem with the libraries.

Another option that worked in easy debian: you can use f2c which converts fortran 77 to C code. You then compile it with gcc.

Regardless it is amazing that the n900 runs fortran code! The next step is to make a rack of n900s and use OPENMPI to run parallel jobs!