Golang有条件编译 [英] Golang conditional compilation
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问题描述
我在Go 1的条件编译中遇到了麻烦。
这是我的测试代码。有什么我误解了// +构建约束和-tags标志?
main1.go
// + build main1
package main
import(
fmt
)
func main(){
fmt.Println(This is main 1)
}
main2.go
// + build main2
package main
进口(
fmt
)
func main(){
fmt.Println(This is main 2)
}
运行go build时,我仍然有编译错误
$ go build -tags'main1'
#test
./main2.go:8:在此块中重新声明
先前的声明在./main1.go:8
解决方案
您必须按照 // +构建XXX
,并留空行。在我简短的搜索中, t找到/如果这是记录。但来源清楚地说出来了
I've got a trouble with conditional compilation in Go 1.
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")
}
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
解决方案
You must follow // +build XXX
with a blank line.
In my brief search, I couldn't find where/if this is documented. But the source clearly calls it out
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