Makefile

LLC ?= llc
CLANG ?= clang
CC ?= gcc

SRCDIR = xdpsock

CSRC = $(shell find kernel_include/ -regex '[^\#]*\.c' -printf 'kernel_include/%P ')
COBJ := $(patsubst %.c,%.o,    $(CSRC))

KERNEL ?= /lib/modules/$(shell uname -r)/build/

CFLAGS ?= -Ikernel_include/tools
CFLAGS += -Ikernel_include/tools/include
CFLAGS += -Ikernel_include/tools/lib
CFLAGS += -Ikernel_include/tools/perf

CFLAGS_BPF ?= -I$(KERNEL)/tools/include
CFLAGS_BPF += -I$(KERNEL)/tools/perf
CFLAGS_BPF += -I$(KERNEL)/usr/include
CFLAGS_BPF += -I$(KERNEL)/arch/x86/include

all: $(SRCDIR)/xdpsock $(SRCDIR)/xdpsock_user_kern.o

$(COBJ): %.o: %.c
	$(CC) $(CFLAGS_BPF) -o $@ -c $<

$(SRCDIR)/xdpsock:  $(SRCDIR)/xdpsock_user.c $(COBJ)
	$(CC) $(CFLAGS) $(COBJ) -lelf -o $@ $<

$(SRCDIR)/xdpsock_user_kern.o: $(SRCDIR)/xdpsock_kern.c
	$(CLANG) -c $< $(CFLAGS) $(CFLAGS_BPF) -D__KERNEL__ -D__BPF_TRACING__  -Wno-unused-value -Wno-pointer-sign -Wno-compare-distinct-pointer-types -Wno-gnu-variable-sized-type-not-at-end -Wno-address-of-packed-member -Wno-tautological-compare -Wno-unknown-warning-option -O2 -emit-llvm -c -o -| llc -march=bpf -filetype=obj  -o $@
	
clean:
	rm -f $(COBJ)
	rm -f $(SRCDIR)/xdpsock
	rm -f $(SRCDIR)/xdpsock_user_kern.o