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bpftool: Skeleton should depend on libbpf
Add the dependency to libbpf, to fix build errors like:
In file included from skeleton/profiler.bpf.c:5:
.../bpf_helpers.h:5:10: fatal error: 'bpf_helper_defs.h' file not found
#include "bpf_helper_defs.h"
^~~~~~~~~~~~~~~~~~~
1 error generated.
make: *** [skeleton/profiler.bpf.o] Error 1
make: *** Waiting for unfinished jobs....
Fixes: 47c09d6a9f
("bpftool: Introduce "prog profile" command")
Suggested-by: Quentin Monnet <quentin@isovalent.com>
Signed-off-by: Song Liu <songliubraving@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Reviewed-by: Quentin Monnet <quentin@isovalent.com>
Acked-by: John Fastabend <john.fastabend@gmail.com>
Link: https://lore.kernel.org/bpf/20200312182332.3953408-3-songliubraving@fb.com
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@ -126,11 +126,12 @@ $(OUTPUT)_prog.o: prog.c
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$(OUTPUT)_bpftool: $(_OBJS) $(LIBBPF)
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$(QUIET_LINK)$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $(_OBJS) $(LIBS)
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skeleton/profiler.bpf.o: skeleton/profiler.bpf.c
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skeleton/profiler.bpf.o: skeleton/profiler.bpf.c $(LIBBPF)
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$(QUIET_CLANG)$(CLANG) \
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-I$(srctree)/tools/include/uapi/ \
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-I$(srctree)/tools/testing/selftests/bpf/include/uapi \
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-I$(srctree)/tools/lib -g -O2 -target bpf -c $< -o $@
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-I$(LIBBPF_PATH) -I$(srctree)/tools/lib \
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-g -O2 -target bpf -c $< -o $@
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profiler.skel.h: $(OUTPUT)_bpftool skeleton/profiler.bpf.o
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$(QUIET_GEN)$(OUTPUT)./_bpftool gen skeleton skeleton/profiler.bpf.o > $@
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