Makefile

TARGETS := kern/openssl
TARGETS += kern/bash
TARGETS += kern/gnutls
TARGETS += kern/nspr
TARGETS += kern/mysqld56

# Generate file name-scheme based on TARGETS
KERN_SOURCES = ${TARGETS:=_kern.c}
KERN_OBJECTS = ${KERN_SOURCES:.c=.o}


# tags date info
TAG_COMMIT := $(shell git rev-list --abbrev-commit --tags --max-count=1)
TAG := $(shell git describe --abbrev=0 --tags ${TAG_COMMIT} 2>/dev/null || true)
COMMIT := $(shell git rev-parse --short HEAD)
DATE := $(shell git log -1 --format=%cd --date=format:"%Y%m%d")
VERSION := $(TAG:v%=%)-$(DATE)-$(COMMIT)
ifneq ($(COMMIT), $(TAG_COMMIT))
	VERSION := $(VERSION)-prev-$(TAG_COMMIT)
endif

ifneq ($(shell git status --porcelain),)
	VERSION := $(VERSION)-dirty
endif

# TODO 系统内核版本检测  5.8 以上
# TODO golang 版本检测  1.16 以上
# @TODO 编译器版本检测，llvm检测，系统版本检测等

# centos 8.2  4.18.0-305.3.1.el8.x86_64
# centos 8.2     gcc 版本 8.4.1 20200928 (Red Hat 8.4.1-1) (GCC)
# clang 12.0.1-4.module_el8.5.0+1025+93159d6c

# 运行环境  5.4.0-96-generic
LLC ?= llc
CLANG ?= clang
EXTRA_CFLAGS ?= -O2 -mcpu=v1 -nostdinc -Wno-pointer-sign

BPFHEADER = -I./kern \

# Target Arch
UNAME_M := $(shell uname -m)
ifeq ($(UNAME_M),x86_64)
   LINUX_ARCH = x86
endif
ifeq ($(UNAME_M),aarch64)
   LINUX_ARCH = arm64
endif

all: $(KERN_OBJECTS) assets build
	@echo $(shell date)

.PHONY: clean assets

clean:
	rm -f user/bytecode/*.d
	rm -f user/bytecode/*.o
	rm -f assets/ebpf_probe.go
	rm -f bin/ecapture

$(KERN_OBJECTS): %.o: %.c
	$(CLANG) -D__TARGET_ARCH_$(LINUX_ARCH) \
		$(EXTRA_CFLAGS) \
		$(BPFHEADER) \
		-target bpfel -c $< -o $(subst kern/,user/bytecode/,$@) \
		-fno-ident -fdebug-compilation-dir . -g -D__BPF_TARGET_MISSING="GCC error \"The eBPF is using target specific macros, please provide -target\"" \
		-MD -MP

assets:
	go run github.com/shuLhan/go-bindata/cmd/go-bindata -pkg assets -o "assets/ebpf_probe.go" $(wildcard ./user/bytecode/*.o)

build:
	CGO_ENABLED=0 go build -ldflags "-w -s -X 'ecapture/cli/cmd.GitVersion=$(VERSION)'" -o bin/ecapture .