Golang 条件编译 [英] Golang conditional compilation

问题描述

我在 Go 1 中的条件编译方面遇到了问题.

I've got a trouble with conditional compilation in Go 1.

这是我的测试代码.我对//+build"约束和-tags"标志有什么误解吗?

Here is my test code. Is there anything I misunderstand about the "// +build" constraint and the "-tags" flag?

main1.go

// +build main1
package main

import (
    "fmt"
)

func main() {
    fmt.Println("This is main 1")
}

main2.go

// +build main2
package main

import (
    "fmt"
)

func main() {
    fmt.Println("This is main 2")
}

运行go build"时，我仍然遇到编译错误

when running "go build", I still got compile error

$ go build -tags 'main1'
# test
./main2.go:8: main redeclared in this block
        previous declaration at ./main1.go:8

推荐答案

你必须在 //+build XXX 后面加一个空行.

You must follow // +build XXX with a blank line.

在我的简短搜索中，我找不到记录在哪里/是否记录.但是 来源 明确指出

In my brief search, I couldn't find where/if this is documented. But the source clearly calls it out

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