ebpf_exporter

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.DEFAULT_GOAL := build
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CC := clang
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ARCH := $(shell uname -m | sed -e 's/x86_64/x86/' -e 's/aarch64/arm64/')
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SRC = ${wildcard *.bpf.c}
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OBJ = ${patsubst %.bpf.c, %.bpf.o, $(SRC)}
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HDR = ${wildcard *.h}
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# From https://github.com/libbpf/libbpf-bootstrap/blob/a7c0f7e4a28/examples/c/Makefile#L34-L43
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# Get Clang's default includes on this system. We'll explicitly add these dirs
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# to the includes list when compiling with `-target bpf` because otherwise some
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# architecture-specific dirs will be "missing" on some architectures/distros -
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# headers such as asm/types.h, asm/byteorder.h, asm/socket.h, asm/sockios.h,
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# sys/cdefs.h etc. might be missing.
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#
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# Use '-idirafter': Don't interfere with include mechanics except where the
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# build would have failed anyways.
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CLANG_BPF_SYS_INCLUDES = $(shell $(CC) -v -E - </dev/null 2>&1 \
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	| sed -n '/<...> search starts here:/,/End of search list./{ s| \(/.*\)|-idirafter \1|p }')
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include ../Makefile.libbpf
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$(OBJ): %.bpf.o: %.bpf.c $(HDR) ../include/$(ARCH)/vmlinux.h $(LIBBPF_DEPS)
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	$(CC) -mcpu=v3 -g -O2 -Wall -Werror -D__TARGET_ARCH_$(ARCH) $(CFLAGS) $(CLANG_BPF_SYS_INCLUDES) -I../include/$(ARCH) $(LIBBPF_CFLAGS) -c -target bpf $< -o $@
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.PHONY: clean
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clean:
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	rm -f *.o
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.PHONY: build
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build: $(OBJ)
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