bootconfig: clean build-time tools/bootconfig from make clean

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The previous patch builds tools/bootconfig during 'make prepare' to
render the embedded bootconfig cmdline, but nothing removes it on
'make clean', leaving the compiled tool and its objects behind.

Wire a bootconfig_clean hook into the top-level clean target so the
compiled tool and its objects are removed by make clean, matching the
prepare-wired tools/objtool and tools/bpf/resolve_btfids.

The hook runs tools/bootconfig's Makefile via $(MAKE), which the kernel
build invokes with -rR (MAKEFLAGS += -rR). -rR drops the built-in $(RM)
variable, so the existing "$(RM) -f ..." clean recipe would expand to a
bare "-f ..." and fail. Spell the recipe with a literal "rm -f" so it
keeps working both standalone and when invoked from Kbuild.

Link: https://lore.kernel.org/all/20260626-bootconfig_using_tools-v7-4-24ab72139c29@debian.org/

Reviewed-by: Nicolas Schier <n.schier@fritz.com>
Signed-off-by: Breno Leitao <leitao@debian.org>
Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>

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This commit is contained in:

Breno Leitao 2026-07-02 21:15:45 +09:00 • committed by Masami Hiramatsu (Google)

parent fc9d904704

commit 1bbab483d3

2 changed files with 11 additions and 2 deletions

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11

Makefile

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2

tools/bootconfig/Makefile

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