While building 2.4.21 on my SS20 SMP box, I noticed "-mno-fpu" being used as a CFLAG. Does anyone know why? This isn't an indication that fp emulation is being compiled into the kernel (i.e. though it may very well be), but a directive to tell GCC to try and use software implementations of fp math. Does anyone know why this is enabled by default? Does this have any negative performance impact on machines that have hardware FPU? Is it safe to compile the kernel without this flag?
There are several dead-end threads about this topic on various newsgroup archives. If any one could shed some light on this, it would be much appreciated. Thanks, Brian
