dongsi2317 2018-04-05 14:26
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构建错误:未知字段“ HideWindow”

I'm making multi-platform Gui applications with golang and Qt. The application executes an external command.

In Windows, a DOS window is displayed when executing the external command. I gave the HideWindow attribute so as not to display this.

  command := exec.Command("hoge", "fuga")
  command.SysProcAttr = &syscall.SysProcAttr{HideWindow: true}

this code works well in Windows, but the following error occurred in the build for MacOS.

unknown field 'HideWindow' in struct literal of type syscall.SysProcAttr

I modified the code as below, but I can not avoid the error. Are there any ideas?

 if runtime.GOOS == "windows" {
  command.SysProcAttr = &syscall.SysProcAttr{HideWindow: true}
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1条回答 默认 最新

  • duangan9251 2018-04-05 14:28

    You cannot fix a compile-time error with a run-time check. You'll need to use build constraints to create separate implementations compatible with each platform. To stay DRY, you'll likely want to create a function that only handles the platform-specific behavior(s), so that the cross-platform code can then call into the platform-specific function (which may be a no-op on platforms that need no platform-specific behavior). So you might have a file for Windows, one for MacOS, and one for Linux (or whatever set of platforms you're supporting), each with a function like:

    // +build darwin
    package whatever
    func prepareBackgroundCommand(cmd *exec.Cmd) {
        cmd.SysProcAttr = &syscall.SysProcAttr{HideWindow: true}

    And another like:

    // +build !darwin
    package whatever
    func prepareBackgroundCommand(cmd *exec.Cmd) {

    So that in your main (non-platform-specific) code, you can call prepareBackgroundCommand(command) and it will handle it correctly based on the platform it's being compiled for.

    本回答被题主选为最佳回答 , 对您是否有帮助呢?



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