Display error message for missing ".BTF" section and clean up empty
vmlinux.h file.

v3:
 - fix typo and make error message consistent. (Andrii Nakryiko)
 - split out perf change.
v2:
 - remove vmlinux specific error info.
 - use builtin target .DELETE_ON_ERROR: to delete empty vmlinux.h


Changbin Du (2):
  libbpf: show error info about missing ".BTF" section
  bpf: makefiles: do not generate empty vmlinux.h

 tools/bpf/bpftool/Makefile           | 3 +++
 tools/lib/bpf/btf.c                  | 1 +
 tools/testing/selftests/bpf/Makefile | 3 +++
 3 files changed, 7 insertions(+)

-- 
2.37.2

Hello:

This series was applied to bpf/bpf-next.git (master)
by Andrii Nakryiko <andrii@kernel.org>:

On Sun, 18 Dec 2022 06:35:07 +0800 you wrote:
> Display error message for missing ".BTF" section and clean up empty
> vmlinux.h file.
> 
> v3:
>  - fix typo and make error message consistent. (Andrii Nakryiko)
>  - split out perf change.
> v2:
>  - remove vmlinux specific error info.
>  - use builtin target .DELETE_ON_ERROR: to delete empty vmlinux.h
> 
> [...]

Here is the summary with links:
  - [v3,1/2] libbpf: show error info about missing ".BTF" section
    https://git.kernel.org/bpf/bpf-next/c/e6b4e1d759d3
  - [v3,2/2] bpf: makefiles: do not generate empty vmlinux.h
    https://git.kernel.org/bpf/bpf-next/c/e7f0d5cdd023

You are awesome, thank you!
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