Thanks! It seems the 'volatile' declaration is exactly what was needed. Ben
Prof Brian Ripley wrote: > In C, declaring a value as 'volatile' should force it to be stored in > a 64-bit memory location. There is no known way to do this in Fortran: > compilers and numeric software have been playing leapfrog games for > years. > What you can do with gcc (the compiler collection) is to compile a > module with -ffloat-store, as we do with dlamc.f. > ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel