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selftests/bpf: BPF object files should depend only on libbpf headers

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There is no need to re-build BPF object files if any of the sources of libbpf
change. So record more precise dependency only on libbpf/bpf_*.h headers. This
eliminates unnecessary re-builds.

Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20200820231250.1293069-2-andriin@fb.com
This commit is contained in:
Andrii Nakryiko 2020-08-20 16:12:35 -07:00 committed by Alexei Starovoitov
parent 3c4a594bc8
commit 3ac2e20fba
1 changed files with 1 additions and 1 deletions
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2
tools/testing/selftests/bpf/Makefile
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@ -316,7 +316,7 @@ $(TRUNNER_BPF_OBJS): $(TRUNNER_OUTPUT)/%.o: \
$(TRUNNER_BPF_PROGS_DIR)/%.c \
$(TRUNNER_BPF_PROGS_DIR)/*.h \
$$(INCLUDE_DIR)/vmlinux.h \
$$(BPFOBJ) | $(TRUNNER_OUTPUT)
$(wildcard $(BPFDIR)/bpf_*.h) | $(TRUNNER_OUTPUT)
$$(call $(TRUNNER_BPF_BUILD_RULE),$$<,$$@, \
$(TRUNNER_BPF_CFLAGS), \
$(TRUNNER_BPF_LDFLAGS))