Yocto Bitbake Ninja：找不到命令

Question

I am following the Yocto Project 2.4.2 Quick Start guide, word for word and it fails when I try to build for the Intel MinnowBoard. I am doing the build on Ubuntu 16.04 LTS in Virtual Box. I did everything twice to be sure and tried the systemd DefaultTasksMax workaround. I also installed ninja.

Is 2.4.2 too new and unstable? What version should I be trying out?

The following start guide command fails, leading to a mismatched git repository.

~/Yocto/poky/meta-intel$ git checkout tags/8.0-rocko-2.4.2 -b meta-intel-rocko-2.4.2
fatal: Cannot update paths and switch to branch 'meta-intel-rocko-2.4.2' at the same time.
Did you intend to checkout 'tags/8.0-rocko-2.4.2' which can not be resolved as commit?

bitbake core-image-base
...
| nm -D -u src/boot/efi/systemd_boot.so | grep ' U ' && exit 1 || :
| x86_64-poky-linux-objcopy -j .text -j .sdata -j .data -j .dynamic \
|   -j .dynsym -j .rel -j .rela -j .reloc --target=efi-app-x86_64 src/boot/efi/systemd_boot.so systemd-bootx64.efi
| /home/Yocto/poky/build/tmp/work/corei7-64-intel-common-poky-linux/systemd-boot/234-r0/temp/run.do_compile.26622: line 120: ninja: command not found
| WARNING: /home/Yocto/poky/build/tmp/work/corei7-64-intel-common-poky-linux/systemd-boot/234-r0/temp/run.do_compile.26622:1 exit 127 from 'ninja src/boot/efi/linux${SYSTEMD_BOOT_EFI_ARCH}.efi.stub'

Answer 1

It looks like you have master of poky and rocko of meta-intel checked out. Make sure to check out the same branch in each repo.

Answer 2

The following command in the quick start guide:

$ git checkout tags/8.0-rocko-2.4.2 -b meta-intel-rocko-2.4.2
 Switched to a new branch 'meta-intel-rocko-2.4.2'

Should be changed to:

~/poky/meta-intel$ git checkout -b meta-intel-rocko-2.4.2  origin/rocko
Branch meta-intel-rocko-2.4.2 set up to track remote branch rocko from origin.
Switched to a new branch 'meta-intel-rocko-2.4.2'