"Christopher C. Chimelis" wrote: > > Just use -mcpu. It should do the right thing in all cases.
Well, I remember bad experiences using -mcpu alone in the past, so I advised to use the linker option, too. But I must admit that this was years ago (most likely egcs 1.0.x on RH 5.1/AXP). > > What are the "symptoms" that a special code needs -mieee? Most packages > > which I compile, are used for molecular phylogeny. MrBayes, as the name > > says, works with Bayesian methods. I guess, that fpu-operations are > > heavily used in these kind of calculations. > > Yes, it sounds like the stuff that you want to compile is definitely in > the "needs -mieee" category :-) Kerstin, be careful! Using -mieee is a big burden if you don't really need it. This option definitely isn't necessary because of floating point calculations per se. The need for -mieee usually can be avoided in source code (if it boils down to denormals and one has the option to patch the sources). > [...] I would recommend compiling them > with Compaq's compilers since they schedule code for EV5 and EV6 much > better than gcc probably ever will. [...] Yes, using Compaq's compilers is worth a try. But this decision is independent of the other (using IEEE software emulation on Alphas or not). Regards, Stefan Schroepfer
