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selftests/bpf: Improve bpftool changes detection 

Detect when bpftool source code changes and trigger rebuild within
selftests/bpf Makefile. Also fix few small formatting problems.

Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Martin KaFai Lau <kafai@fb.com>
Acked-by: Toke Høiland-Jørgensen <toke@redhat.com>
Link: https://lore.kernel.org/bpf/20200124054148.2455060-1-andriin@fb.com
This commit is contained in:
Andrii Nakryiko 2020-01-23 21:41:48 -08:00 committed by Daniel Borkmann
parent 1a6fa10640
commit 03506297d2
1 changed files with 6 additions and 5 deletions
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11
tools/testing/selftests/bpf/Makefile
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@ -155,16 +155,17 @@ $(OUTPUT)/test_sysctl: cgroup_helpers.c
DEFAULT_BPFTOOL := $(SCRATCH_DIR)/sbin/bpftool
BPFTOOL ?= $(DEFAULT_BPFTOOL)
$(DEFAULT_BPFTOOL): $(BPFOBJ) | $(BUILD_DIR)/bpftool
$(Q)$(MAKE) $(submake_extras) -C $(BPFTOOLDIR) \
OUTPUT=$(BUILD_DIR)/bpftool/ \
$(DEFAULT_BPFTOOL): $(wildcard $(BPFTOOLDIR)/*.[ch] $(BPFTOOLDIR)/Makefile) \
$(BPFOBJ) | $(BUILD_DIR)/bpftool
$(Q)$(MAKE) $(submake_extras) -C $(BPFTOOLDIR) \
OUTPUT=$(BUILD_DIR)/bpftool/ \
prefix= DESTDIR=$(SCRATCH_DIR)/ install
$(BPFOBJ): $(wildcard $(BPFDIR)/*.c $(BPFDIR)/*.h $(BPFDIR)/Makefile) \
$(BPFOBJ): $(wildcard $(BPFDIR)/*.[ch] $(BPFDIR)/Makefile) \
../../../include/uapi/linux/bpf.h \
| $(INCLUDE_DIR) $(BUILD_DIR)/libbpf
$(Q)$(MAKE) $(submake_extras) -C $(BPFDIR) OUTPUT=$(BUILD_DIR)/libbpf/ \
DESTDIR=$(SCRATCH_DIR) prefix= all install_headers
DESTDIR=$(SCRATCH_DIR) prefix= all install_headers
$(BUILD_DIR)/libbpf $(BUILD_DIR)/bpftool $(INCLUDE_DIR):
$(call msg,MKDIR,,$@)