Dennis Wassel wrote: > 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! In the 64-bit Linux system we have a backwards compatibility mode that allows us to run 32-bit applications. We don't have a corresponding 64-bit mode on 32-bit systems. Andrew.
