[yocto] The best way to change target architecture

Leonardo Sandoval leonardo.sandoval.gonzalez at linux.intel.com
Tue Jun 6 08:59:33 PDT 2017


On Tue, 2017-06-06 at 08:42 -0400, Zhuoqun Cheng wrote:
> Hi Yocto Experts,
> 
> 
> I'm fairly new to Yocto and I've already tried my best to search for
> answers, but not happy with what I found.
> 
> 
> So here's the situation I've got: 
> 
> 
> I'm using yocto to build the intel aero board image, following this
> link:
> https://github.com/intel-aero/meta-intel-aero/wiki/Quickstart-Guide#yocto-for-intel-aero
> 
> 
> 
> Everything worked fine, until I wanted to change the target
> architecture from the default 64-bit x86 to 32-bit x86. What I did is
> three steps:
> 1. do a clean: bitbake -c clean intel-aero-image
> 2. change configuration, from "require
> conf/machine/intel-corei7-64.conf" to "require
> conf/machine/intel-core2-32.conf" in the file
> "meta-intel-aero/conf/machine/intel-aero.conf"
> 3. do a build: bitbake intel-aero-image
> 
Did you change the MACHINE var?



> 
> Unfortunately, I got loads of errors, like "ERROR: linux-yocto-4.4.60
> +gitAUTOINC+2cc78e92f4-r0 do_package_qa: QA Issue: Architecture did
> not match (3 to 62) on
> work/core2-32-intel-common-poky-linux/linux-yocto/4.4.60+gitAUTOINC
> +2cc78e92f4-r0/packages-split/kernel-module-gspca-kinect/lib/modules/4.4.60-yocto-standard/kernel/drivers/media/usb/gspca/gspca_kinect.ko [arch]
> "
> 
> 
> Then I tried deleting all the files in the packages-split directory
> and rebuilding. It passed building the kernel (even though failed
> because some other package's arch mismatch), but those file I deleted
> never got generated again! Now I'm a bit worried.
> 
> 
> So I guess my question is:
> What is the correct procedures to follow to reuse a poky folder
> (already built once) for a different target architecture? I'm happy to
> accept any links and suggested readings.
> 
> 
> Thanks a lot!
> Tom.
> 
> 
> -- 
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