there is a bug in the Kernel compilation when defining CFLAGS=" -march=i586" or CFLAGS="-march=C3" in make.conf The compiled kernel requires support for CMOV from the CPU which is a pure i686 feature. (=should be only enabled if march=i686 has been defined) As a result no kernal code can run on i586 or C3 CPUs. Can you please provide a quick workaround for genkernel-3.4.10-r2 and file a bug for the vanilla kernel since this seems to be also wrong in the vanilla kernel. Reproducible: Always Steps to Reproduce: 1. Compile a Kernel with CFLAGS=" -march=i586" or CFLAGS="-march=C3" 2. Run the Kernel on a i586 or Via C3 CPU Actual Results: Kernel does not run since it requires support of cmov from the CPU Expected Results: Expected result: Kernel DOES run on a i586 or C3 CPU
What makes you think this has anything to do with the kernel sources or genkernel? If -march=i586 generates CMOV instructions, it's because gcc is doing something stupid. Does the kernel build system even accept externally defined CFLAGS?
Genkernel does not pass the cflags to the kernel - you must select the correct cpu target in the kernel configuration: CONFIG_MVIAC7 or CONFIG_MVIAC3_2 depending on your system. If you have a non-CMOV C3, that's actually the VIA C7 in the kernel. agaffney: mark invalid I think
That's what I figured.
