Hi, I've been trying to compile the ATLAS library on an 32-bit Linux system with my self-compiled gcc 4.3.0, but this fails. It boils down to the ATLAS config utility noticing that I have a 64-bit processor and trying to compile some low-level stuff with -m64, which doesn't work because I have not compiled in 64-bit support. [I could force 32-bit mode, but I feel that 64-bit mode surely improves performance, which is what ATLAS is for in the first place] Ok, so I try and recompile gcc, telling it that I do indeed have a 64-bit processor, and it "profiledbootstrap"s itself merrily, until at some point ld whines that it cannot find a compatible libc. Fine. I'm now going to try to build a 64-bit glibc (and worry where to put it later, because I'm not root), and possible the full-fledged binutils toolchain and so on, but now I feel this chicken-and-egg-problem creeping up to me - wouldn't I need 64-bit support in my compiler to create the corresponding glibc? D'oh! Any pointers, docs or howtos anyone? Much appreciated! Cheers, Dennis