Makefile

CFLAGS += -g -Wall
LDFLAGS += -lm -lpthread

ifdef SYSROOT
CFLAGS += --sysroot=${SYSROOT}
endif

CC=$(CROSS_COMPILE)gcc

ALL_SOURCES := debug.c rtprint.c echo_lat.c pkt_gen.c plget_args.c \
plget.c result.c rtt.c rx_lat.c stat.c tx_lat.c

ifdef AFXDP
all: sub_libbpf plget
else
all: plget
endif

LIBBPF_SRC=./libbpf/src

ifdef AFXDP
AFXDP_SOURCES := xdp_prog_load.c xdp_sock.c
ALL_SOURCES += ${AFXDP_SOURCES}

CFLAGS += -DCONF_AFXDP

CFLAGS += -I${SYSROOT}/usr/include
LDFLAGS += -L${SYSROOT}/usr/lib

LIBBPF_STATUS := $(shell ./scripts/check-libbpf.sh $(SYSROOT))

CFLAGS += -Ilibbpf/src/
LDFLAGS += -Llibbpf/src
LDFLAGS += -lz -lelf
LDFLAGS += -lbpf

export CROSS_COMPILE
export ARCH
export CC
endif # AFXDP

sub_libbpf:
ifneq ($(LIBBPF_STATUS),)
	$(MAKE) -C $(LIBBPF_SRC)
endif

plget: %: $(ALL_SOURCES:.c=.o)
	@echo "CC " $@
	@$(CC) -o $@ $^ $(LDFLAGS)

# Option -MD needed to generate .d files in order to include them
%.o: %.c
	@echo "CC " $@
	@$(CC) -c -MD $< -o $@ $(CFLAGS)

#include targets for all headers, generated by -MD command
include $(wildcard *.d)

clean:
	rm -f $$(ls *.o | sed '/xsock_dispatch.o/d') *.d plget
	@if [ -e $(LIBBPF_SRC)/Makefile ]; then\
		$(MAKE) -C $(LIBBPF_SRC) clean;\
	fi

distclean: clean
	rm -rf cscope* tags

.PHONY: clean distclean sub_libbpf