Re: [gentoo-user] march to cross-compile ASUS laptop
On Tue, Jul 11, 2017 at 06:06:26PM -0500, Andrés Becerra Sandoval wrote: >Hello, > >I want to use a build host to create packages for a L402N Asus laptop. > >% grep -m1 -A3 "vendor_id" /proc/cpuinfo >vendor_id : GenuineIntel >cpu family : 6 >model : 92 >model name : Intel(R) Celeron(R) CPU N3350 @ 1.10GHz > >intel has this specs: > > [1]http://ark.intel.com/products/95598/Intel-Celeron-Processor-N3350-2M-Cache-up-to-2_4-GHz > >and, in the following website: > > [2]https://en.wikichip.org/wiki/intel/celeron/n3350 > >It says that the microarchitecture is apollo-lake. > >What would be the proper march configuration for this box? > Hi, if you have Gentoo already installed on the box, make sure that you configured the same compiler version as on the build host (gcc-config) and then run: gcc -### -march=native -E /usr/include/stdlib.h 2>&1 | grep "/usr/libexec/gcc/.*cc1" Everything after "-march=..." should be what your gcc version would use when using march=native on the laptop. WKR Hinnerk
Re: [gentoo-user] march to cross-compile ASUS laptop
On Tue, Jul 11, 2017 at 7:06 PM, Andrés Becerra Sandoval wrote: > It says that the microarchitecture is apollo-lake. > > What would be the proper march configuration for this box? > > > -- > Andrés Becerra Sandoval > apollo-lake.= goldmont As gcc appears to have no support as of yet, I would use "-march=silvermont" goldmont is basically silvermont+
Re: [gentoo-user] march to cross-compile ASUS laptop
On Tue, Jul 11, 2017 at 6:06 PM, Andrés Becerra Sandoval wrote: > > It says that the microarchitecture is apollo-lake. > > What would be the proper march configuration for this box? > Per the GCC documentation, here are the options you can pass to -march (described under the section for -mtune): https://gcc.gnu.org/onlinedocs/gcc-4.5.3/gcc/i386-and-x86_002d64-Options.html https://gcc.gnu.org/onlinedocs/gcc-6.1.0/gcc/x86-Options.html https://gcc.gnu.org/onlinedocs/gcc-7.1.0/gcc/x86-Options.html Surprisingly it was hard to find this page of the documentation, even knowing what I was looking for. You should also refer to the Wiki documentation for -march, found here: https://wiki.gentoo.org/wiki/GCC_optimization#-march. Specifically I need to point out the use of cpuinfo2cpuflags-x86. If you are finding it hard to find the corresponding -march/-mtune setting for your processor by name, you may need to select an equivalent setting by looking at the features your CPU supports. You can also ask the list. R0b0t1.
