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tools/bpftool: Support passing BPFTOOL_VERSION to make

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This change facilitates out-of-tree builds, packaging, and versioning for
test and debug purposes. Defining BPFTOOL_VERSION allows self-contained
builds within the tools tree, since it avoids use of the 'kernelversion'
target in the top-level makefile, which would otherwise pull in several
other includes from outside the tools tree.

Signed-off-by: Tony Ambardar <Tony.Ambardar@gmail.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Quentin Monnet <quentin@isovalent.com>
Acked-by: Song Liu <songliubraving@fb.com>
Link: https://lore.kernel.org/bpf/20200917115833.1235518-1-Tony.Ambardar@gmail.com
This commit is contained in:
Tony Ambardar 2020-09-17 04:58:33 -07:00 committed by Daniel Borkmann
parent 642e450b6b
commit ba2fd563b7
1 changed files with 1 additions and 1 deletions
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2
tools/bpf/bpftool/Makefile
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@ -25,7 +25,7 @@ endif
LIBBPF = $(LIBBPF_PATH)libbpf.a
BPFTOOL_VERSION := $(shell make -rR --no-print-directory -sC ../../.. kernelversion)
BPFTOOL_VERSION ?= $(shell make -rR --no-print-directory -sC ../../.. kernelversion)
$(LIBBPF): FORCE
$(if $(LIBBPF_OUTPUT),@mkdir -p $(LIBBPF_OUTPUT))