On Sat, 23 Feb 2019 at 22:18, Philip Prindeville <philipp_s...@redfish-solutions.com> wrote: > I’ve worked on a lot of embedded projects involving cross-building (like > AstLinux and OpenWrt), but I’m new to Yocto so please bear with the noob > questions. > > I’d like to build packages (mostly RPM’s, plus a Linux kernel or three) on an > x86_64 (AMD64) Linux (CentOS 7.6) platform, but for e500v2 and 85xxDP PPC > targets. > > What do I need to do to set up a toolchain and environment to be able to do > that?
First, you need to figure out which BSP layer provides support for your targets. What boards are you targeting? > Ideally, I’d also like to set up an RPM target so I could use “rpmbuild > --target e500v2-unknown-linux” (or whatever) and it would use the correct > compiler, linker, archiver, sysheaders, etc. > > Advice on both of these, or just pointers to instructions on how to set it > all up, would be great. I'd suggest you start with the yocto quickstart guide, so you'll know the basic procedures. https://www.yoctoproject.org/docs/latest/brief-yoctoprojectqs/brief-yoctoprojectqs.html > For instance, do I need one compiler only that can handle multiple processor > variants via the --march= flag, or is this not the right way to go? And > similarly, since the linker can rewrite code (shortening branch offsets, > peep-hole optimization, unreachable code removal, etc.) do I need different > linker versions for the 2 PPC variants? This is what BSP layers do, they define a target machine (which includes compiler and linker settings), and give it a name. Then you place that name in your configuration file, and the target build process will sort itself out. Alex -- _______________________________________________ yocto mailing list yocto@yoctoproject.org https://lists.yoctoproject.org/listinfo/yocto
