1-12. go链接参数 ldflags

1 前戏：”链接“基础概念

• 参考文章：http://blog.champbay.com/2019/11/25/%e9%9d%99%e6%80%81%e9%93%be%e6%8e%a5%e5%8a%a8%e6%80%81%e9%93%be%e6%8e%a5%e9%9d%99%e6%80%81%e5%ba%93%e5%85%b1%e4%ba%ab%e5%ba%93%e8%bf%99%e4%ba%9b%e6%a6%82%e5%bf%b5%e7%9a%84%e8%af%a6%e8%a7%a3/

2 ldflags 用于链接过程

• 通过命令go tool dist list查看go支持的平台：

  1

  aix/ppc64, android/386, android/amd64, android/arm, android/arm64, darwin/amd64, darwin/arm64, dragonfly/amd64, freebsd/386, freebsd/amd64, freebsd/arm, freebsd/arm64, illumos/amd64, ios/amd64, ios/arm64, js/wasm, linux/386, linux/amd64, linux/arm, linux/arm64, linux/mips, linux/mips64, linux/mips64le, linux/mipsle, linux/ppc64, linux/ppc64le, linux/riscv64, linux/s390x, netbsd/386, netbsd/amd64, netbsd/arm, netbsd/arm64, openbsd/386, openbsd/amd64, openbsd/arm, openbsd/arm64, openbsd/mips64, plan9/386, plan9/amd64, plan9/arm, solaris/amd64, windows/386, windows/amd64, windows/arm, windows/arm64

• 大佬的文章： https://tonybai.com/2017/06/27/an-intro-about-go-portability/

3 配置go应用和变量

• 参数

  • -w 去掉调试信息
  • -s 去掉符号表
  • -X 注入变量, 编译时赋值

• 使用范围：go install 、go build、go run 、go test

• 编译

  1. ‘${GO_PATH}/main.go’

     1 2 3 4 5

     package main var B int func main(){ fmt.Println(B) }

  2. 编译 go build -ldflags '-w -s -X ${GO_PATH}/main.B=100' -o main main.go

  3. 运行二进制文件输出：100

• 使用变量

  1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

  Module=github.com/pubgo/xxx GOPATH=$(shell go env GOPATH) Version=$(shell git tag --sort=committerdate | tail -n 1) GoVersion=$(shell go version) BuildTime=$(shell date "+%F %T") CommitID=$(shell git rev-parse HEAD) LDFLAGS:=-ldflags "-X 'github.com/pubgo/xxx/version.GoVersion=${GoVersion}' \ -X 'github.com/pubgo/xxx/version.BuildTime=${BuildTime}' \ -X 'github.com/pubgo/xxx/version.GoPath=${GOPATH}' \ -X 'github.com/pubgo/xxx/version.CommitID=${CommitID}' \ -X 'github.com/pubgo/xxx/version.Module=${Module}' \ -X 'github.com/pubgo/xxx/version.Version=${Version:-v0.0.1}'" // go build ${LDFLAGS} -mod vendor -race -v -o main main.go