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runsqslower: Support user-specified libbpf include and object paths

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This adds support for specifying the libbpf include and object paths as
arguments to the runqslower Makefile, to support reusing the libbpf version
built as part of the selftests.

Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/157952561135.1683545.5660339645093141381.stgit@toke.dk
This commit is contained in:
Toke Høiland-Jørgensen 2020-01-20 14:06:51 +01:00 committed by Alexei Starovoitov
parent a9ed34c0b7
commit b6580cd899
1 changed files with 7 additions and 5 deletions
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12
tools/bpf/runqslower/Makefile
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@ -6,7 +6,9 @@ LLVM_STRIP := llvm-strip
DEFAULT_BPFTOOL := $(OUTPUT)/sbin/bpftool
BPFTOOL ?= $(DEFAULT_BPFTOOL)
LIBBPF_SRC := $(abspath ../../lib/bpf)
INCLUDES := -I$(OUTPUT) -I$(abspath ../../lib)
BPFOBJ := $(OUTPUT)/libbpf.a
BPF_INCLUDE := $(OUTPUT)
INCLUDES := -I$(BPF_INCLUDE) -I$(OUTPUT) -I$(abspath ../../lib)
CFLAGS := -g -Wall
# Try to detect best kernel BTF source
@ -37,7 +39,7 @@ clean:
$(call msg,CLEAN)
$(Q)rm -rf $(OUTPUT) runqslower
$(OUTPUT)/runqslower: $(OUTPUT)/runqslower.o $(OUTPUT)/libbpf.a
$(OUTPUT)/runqslower: $(OUTPUT)/runqslower.o $(BPFOBJ)
$(call msg,BINARY,$@)
$(Q)$(CC) $(CFLAGS) -lelf -lz $^ -o $@
@ -50,7 +52,7 @@ $(OUTPUT)/%.skel.h: $(OUTPUT)/%.bpf.o | $(BPFTOOL)
$(call msg,GEN-SKEL,$@)
$(Q)$(BPFTOOL) gen skeleton $< > $@
$(OUTPUT)/%.bpf.o: %.bpf.c $(OUTPUT)/libbpf.a | $(OUTPUT)
$(OUTPUT)/%.bpf.o: %.bpf.c $(BPFOBJ) | $(OUTPUT)
$(call msg,BPF,$@)
$(Q)$(CLANG) -g -O2 -target bpf $(INCLUDES) \
-c $(filter %.c,$^) -o $@ && \
@ -73,9 +75,9 @@ $(OUTPUT)/vmlinux.h: $(VMLINUX_BTF_PATH) | $(OUTPUT) $(BPFTOOL)
fi
$(Q)$(BPFTOOL) btf dump file $(VMLINUX_BTF_PATH) format c > $@
$(OUTPUT)/libbpf.a: | $(OUTPUT)
$(BPFOBJ): | $(OUTPUT)
$(Q)$(MAKE) $(submake_extras) -C $(LIBBPF_SRC) \
OUTPUT=$(abs_out)/ $(abs_out)/libbpf.a
OUTPUT=$(abspath $(dir $@))/ $(abspath $@)
$(DEFAULT_BPFTOOL):
$(Q)$(MAKE) $(submake_extras) -C ../bpftool \