Richard Henderson writes: > On 04/05/2016 12:02 PM, Lluís Vilanova wrote: >> Peter Maydell writes: >> >>> On 5 April 2016 at 17:31, Richard Henderson <r...@twiddle.net> wrote: >>>> On 04/05/2016 09:23 AM, Lluís Vilanova wrote: >>>>> >>>>> Got it! >>>>> >>>>> gcc -march=native --help=params -v 2>&1 | grep "param >>>>> l1-cache-line-size" | sed -e 's/.* --param l1-cache-line-size=\([0-9]\+\) >>>>> .*/\1/' >>>> >>>> >>>> That will only work on x86, where we can be pretty sure it's 64 anyway. >> >> Oh, you mean l1-cache-line-size is an x86-only parameter in GCC?
> No, using -march=native to detect the host line size. Ah. That's just an example. For cross-compilation you would use a different march argument (or none to use the default target sub-arch) and get the parameter for the target processor. This should already be known by configure as part of the arguments to select the cross-compiler and target architecture (e.g., CC). Lluis
