#
#  SPDX-License-Identifier: AGPL-3.0-only
#  Copyright (c) 2022-2023, v2rayA Organization <team@v2raya.org>
#

# The development version of clang is distributed as the 'clang' binary,
# while stable/released versions have a version number attached.
# Pin the default clang to a stable version.
CLANG ?= clang
STRIP ?= llvm-strip
CFLAGS := -O2 -Wall -Werror $(CFLAGS)
TARGET ?= bpfel,bpfeb
OUTPUT ?= dae
MAX_MATCH_SET_LEN ?= 64
CFLAGS := -DMAX_MATCH_SET_LEN=$(MAX_MATCH_SET_LEN) $(CFLAGS)

# Get version from .git.
date=$(shell git log -1 --format="%cd" --date=short | sed s/-//g)
count=$(shell git rev-list --count HEAD)
commit=$(shell git rev-parse --short HEAD)
ifeq ($(wildcard .git/.),)
	VERSION ?= unstable-0.nogit
else
	VERSION ?= unstable-$(date).r$(count).$(commit)
endif

.PHONY: clean-ebpf ebpf dae

dae: ebpf
	go build -o $(OUTPUT) -trimpath -ldflags "-s -w -X github.com/v2rayA/dae/cmd.Version=$(VERSION) -X github.com/v2rayA/dae/common/consts.MaxMatchSetLen_=$(MAX_MATCH_SET_LEN)" .

clean-ebpf: 
	@rm -f control/bpf_bpf*.go && \
		rm -f control/bpf_bpf*.o

# $BPF_CLANG is used in go:generate invocations.
ebpf: export BPF_CLANG := $(CLANG)
ebpf: export BPF_STRIP := $(STRIP)
ebpf: export BPF_CFLAGS := $(CFLAGS)
ebpf: export BPF_TARGET := $(TARGET)
ebpf: clean-ebpf
	@unset GOOS && \
    unset GOARCH && \
    unset GOARM && \
    go generate ./control/control.go