Compiler notes

The code was written in vanilla Fortran90 with OpenMP compiler directives, to ensure a level of portability. Initial development was done simultaneously on the SGI platform, and a Linux workstation with the NAGware F90 compiler, again for reasons of portability. Unfortunately, when recompiling the code on with the Portland Group F90 compiler, we ran into the compiler bugs described above that necessitated rewriting of large portions of the code.