必须先从模块"Darwin.POSIX.sys.types"导入"u_char"声明 [英] Declaration of 'u_char' must be imported from module 'Darwin.POSIX.sys.types' before it is required

问题描述

我在Swift框架中导入了"if_dl.h"，以便像这样使用sockaddr_dl:

I imported "if_dl.h" in my Swift framework to use sockaddr_dl like this :

module net [system]  [extern_c] {

     module if_dl {
         umbrella header
         "/Applications/Xcode_7.3.1.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/usr/include/net/if_dl.h"
         module * {export *}
     }

 }

现在我收到此错误:

必须从模块中导入"u_char"的声明 不需要'Darwin.POSIX.sys.types'

Declaration of 'u_char' must be imported from module 'Darwin.POSIX.sys.types' before it is required

我试图在类代码中添加"import Darwin"，但这不能解决问题.

I tried to add "import Darwin" in the class code but it's not resolving the problem.

推荐答案

我解决了这个问题，

模块类型"必须在模块"net"内部，并且必须在添加"if_dl"之前添加

Module "types" have to be inside the module "net" and it have to be added before adding "if_dl"

 module net [system]  [extern_c] {

     module types {
         header "/usr/include/sys/types.h"
         export *
     }

     module if_dl {

         header
         "/usr/include/net/if_dl.h"
         export *
     }

 }

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