Hi Arnaldo,

On 9/3/20 9:03 PM, Arnaldo Carvalho de Melo wrote:
Em Thu, Aug 27, 2020 at 10:53:36AM +0200, Jesper Dangaard Brouer escreveu:
The system for "Auto-detecting system features" located under
tools/build/ are (currently) used by perf, libbpf and bpftool. It can
contain stalled feature detection files, which are not cleaned up by
libbpf and bpftool on make clean (side-note: perf tool is correct).

Fix this by making the users invoke the make clean target.

Some details about the changes. The libbpf Makefile already had a
clean-config target (which seems to be copy-pasted from perf), but this
target was not "connected" (a make dependency) to clean target. Choose
not to rename target as someone might be using it. Did change the output
from "CLEAN config" to "CLEAN feature-detect", to make it more clear
what happens.

Since this mostly touches BPF, should it go via the BPF tree?

Already applied roughly a week ago:

https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git/commit/?id=661b37cd437ef49cd28444f79b9b0c71ea76e8c8

Thanks,
Daniel

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