kbuild: Add CONFIG_PAHOLE_VERSION

commit 613fe16923 upstream.

There are a few different places where pahole's version is turned into a
three digit form with the exact same command. Move this command into
scripts/pahole-version.sh to reduce the amount of duplication across the
tree.

Create CONFIG_PAHOLE_VERSION so the version code can be used in Kconfig
to enable and disable configuration options based on the pahole version,
which is already done in a couple of places.

Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20220201205624.652313-3-nathan@kernel.org
Signed-off-by: Matthias Maennich <maennich@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Nathan Chancellor 2022-02-01 13:56:21 -07:00 коммит произвёл Greg Kroah-Hartman
Родитель c98077f759
Коммит 3597fd5f92
3 изменённых файлов: 18 добавлений и 0 удалений

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@ -3407,6 +3407,7 @@ F: net/sched/act_bpf.c
F: net/sched/cls_bpf.c
F: samples/bpf/
F: scripts/bpf_doc.py
F: scripts/pahole-version.sh
F: tools/bpf/
F: tools/lib/bpf/
F: tools/testing/selftests/bpf/

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@ -91,6 +91,10 @@ config CC_HAS_ASM_INLINE
config CC_HAS_NO_PROFILE_FN_ATTR
def_bool $(success,echo '__attribute__((no_profile_instrument_function)) int x();' | $(CC) -x c - -c -o /dev/null -Werror)
config PAHOLE_VERSION
int
default $(shell,$(srctree)/scripts/pahole-version.sh $(PAHOLE))
config CONSTRUCTORS
bool

13
scripts/pahole-version.sh Executable file
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@ -0,0 +1,13 @@
#!/bin/sh
# SPDX-License-Identifier: GPL-2.0
#
# Usage: $ ./pahole-version.sh pahole
#
# Prints pahole's version in a 3-digit form, such as 119 for v1.19.
if [ ! -x "$(command -v "$@")" ]; then
echo 0
exit 1
fi
"$@" --version | sed -E 's/v([0-9]+)\.([0-9]+)/\1\2/'