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authorViktor Malik <vmalik@redhat.com>2023-10-25 08:19:14 +0200
committerDaniel Borkmann <daniel@iogearbox.net>2023-10-26 15:32:13 +0200
commit37db10bc247d5d0b448babd7ff386f092246e732 (patch)
tree571972ac5c029ce9bc18352630b1de1084a751a0 /samples
parentf56bcfadf7d6d56b099726df4fc262b76486b0e0 (diff)
samples/bpf: Allow building with custom bpftool
samples/bpf build its own bpftool boostrap to generate vmlinux.h as well as some BPF objects. This is a redundant step if bpftool has been already built, so update samples/bpf/Makefile such that it accepts a path to bpftool passed via the BPFTOOL variable. The approach is practically the same as tools/testing/selftests/bpf/Makefile uses. Signed-off-by: Viktor Malik <vmalik@redhat.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/bpf/bd746954ac271b02468d8d951ff9f11e655d485b.1698213811.git.vmalik@redhat.com
Diffstat (limited to 'samples')
-rw-r--r--samples/bpf/Makefile5
1 files changed, 3 insertions, 2 deletions
diff --git a/samples/bpf/Makefile b/samples/bpf/Makefile
index 378b9f3e9321..933f6c3fe6b0 100644
--- a/samples/bpf/Makefile
+++ b/samples/bpf/Makefile
@@ -260,8 +260,9 @@ $(LIBBPF): $(wildcard $(LIBBPF_SRC)/*.[ch] $(LIBBPF_SRC)/Makefile) | $(LIBBPF_OU
BPFTOOLDIR := $(TOOLS_PATH)/bpf/bpftool
BPFTOOL_OUTPUT := $(abspath $(BPF_SAMPLES_PATH))/bpftool
-BPFTOOL := $(BPFTOOL_OUTPUT)/bootstrap/bpftool
-$(BPFTOOL): $(wildcard $(BPFTOOLDIR)/*.[ch] $(BPFTOOLDIR)/Makefile) | $(BPFTOOL_OUTPUT)
+DEFAULT_BPFTOOL := $(BPFTOOL_OUTPUT)/bootstrap/bpftool
+BPFTOOL ?= $(DEFAULT_BPFTOOL)
+$(DEFAULT_BPFTOOL): $(wildcard $(BPFTOOLDIR)/*.[ch] $(BPFTOOLDIR)/Makefile) | $(BPFTOOL_OUTPUT)
$(MAKE) -C $(BPFTOOLDIR) srctree=$(BPF_SAMPLES_PATH)/../../ \
OUTPUT=$(BPFTOOL_OUTPUT)/ bootstrap