buildroot notes

  • do not run as root
# login user  
$ mkdir br_ppc64
$ wget https://buildroot.uclibc.org/downloads/snapshots/buildroot-snapshot.tar.bz2  
$ tar xf buildroot-snapshot.tar.bz2  
$ cd buildroot

  • We build out-of-tree, just setup once!
    $ make O=/home/user/br_ppc64

  • Move back, now we have the Makefile to build out-of-tree!
    $ cd /home/user/br_ppc64

TARGET a (real or emulated) ppc64

  • Import a cfg
    $ make defconfig BR2_DEFCONFIG=/home/user/br_ppc64/defconfig

  • Make changes
    make menuconfig

Build

$ make

  • We got kernel and initramfs as compressed cpio!

Optional

  • Strip kernel 
    $ export PATH=${PATH}:$(pwd)/host/usr/bin
$ powerpc64-linux-strip -s images/vmlinux
  • Or
    $ host/usr/bin/powerpc64-linux-strip -s images/vmlinux

Booting on real TARGET

  • Use current bootload (yaboot, GRUB2)
  • From OpenFirmware (Forth command prompt, TFTP)

Emulating

  • Test on emulated qemu-system-TARGET 
    qemu-system-ppc64 \
-kernel images/vmlinux
-initrd images/rootfs.cpio.xz \
-vnc :2 -vga std -m 512 \
-netdev user,id=net0 -device virtio-net-pci,netdev=net0 \
-device virtio-keyboard-pci

Now bootstrap Fedora ppc64

  • Todo