Hello!

On Tue, 22 Oct 2019 at 21:42, Leo Yan leo.yan@linaro.org wrote:

Hi Naresh,

On Tue, Oct 22, 2019 at 09:04:04PM +0530, Naresh Kamboju wrote:

...

We have noticed perf (OE recipe) build failure on linux next 20191022. do you see this failure ?

/bin/sh: 1: perf/1.0-r9/perf-1.0/scripts/bpf_helpers_doc.py: not found Makefile:184: recipe for target 'bpf_helper_defs.h' failed make[3]: *** [bpf_helper_defs.h] Error 127 make[3]: *** Deleting file 'bpf_helper_defs.h' Makefile.perf:765: recipe for target 'perf/1.0-r9/perf-1.0/libbpf.a' failed make[2]: *** [perf/1.0-r9/perf-1.0/libbpf.a] Error 2

I tested for two methods with linux-next, one is native building mode for Arm64 building on DB410c board, another is cross compiling Arm64 binary on my x86 laptop. Both cannot reproduce this failure.

After read your shared build log and I think the building process is expected: Perf tool tries to build libbpf, so it changes to the building folder 'BPF_DIR' (which is under $(srctree)/tools/lib/bpf/), then failed to find file $(srctree)/scripts/bpf_helpers_doc.py.

Here $(srctree) means the kernel's root folder.

Seems to me, this failure is caused by missing to sync kernel files $linux_src/scripts to the OE folder 'perf/1.0-r9/perf-1.0/scripts'?

Yes, this is exactly the reason. As of e01a75c159691 (merged on next-20191022), we need to include linux/scripts into the source directory for OpenEmbedded to build Perf. We have now sent a fix to OE-core.

By the way, while looking at this, we found this unresolved conflict in the tree: -----8<----------8<----------8<----- $ git show 2b5d5b1927a8c commit 2b5d5b1927a8c17bf3ce5b4f781c6ba11e02cadd Merge: c1e45431c592 ae79d5588a04 Author: Ingo Molnar mingo@kernel.org Date: Mon Oct 21 07:13:15 2019 +0200

Merge branch 'perf/core'

Conflicts: tools/perf/check-headers.sh

diff --cc tools/perf/check-headers.sh index 499235a41162,93c46d38024e..1f73e6f7438c --- a/tools/perf/check-headers.sh +++ b/tools/perf/check-headers.sh @@@ -28,7 -28,7 +28,11 @@@ arch/x86/include/asm/disabled-features. arch/x86/include/asm/required-features.h arch/x86/include/asm/cpufeatures.h arch/x86/include/asm/inat_types.h ++<<<<<<< HEAD +arch/x86/include/asm/emulate_prefix.h ++======= + arch/x86/include/asm/msr-index.h ++>>>>>>> perf/core arch/x86/include/uapi/asm/prctl.h arch/x86/lib/x86-opcode-map.txt arch/x86/tools/gen-insn-attr-x86.awk ----->8---------->8---------->8-----

That's still on next-20191024.

Greetings!

Daniel Díaz daniel.diaz@linaro.org

Thanks, Leo Yan

...

Metadata:

kernel: 5.4.0-rc4 git repo: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git git branch: master git commit: a722f75b2923b4fd44c17e7255e822ac48fe85f0 git describe: next-20191022 Test details: https://qa-reports.linaro.org/lkft/linux-next-oe/build/next-20191022

Full build log: https://ci.linaro.org/view/lkft/job/openembedded-lkft-linux-next/DISTRO=lkft...

• Naresh