PX4 编译程序出错

wjd1998

不能发截图我描述下，帮我看看什么原因：
   错误提示： PXFirmware/src/drivers/device/device_nuttx.h:60:1  error:  unknown type name 'namespace  namespace device __EXPORT


这是device/device_nuttx.h 中的代码部分：
  /**
* Namespace encapsulating all device framework classes, functions and data.
*/
namespace device __EXPORT
{

typedef struct file file_t;

/**
* Fundamental base class for all device drivers.
*
* This class handles the basic "being a driver" things, including
* interrupt registration and dispatch.
*/
class __EXPORT Device
{
public:
        /**
         * Destructor.
         *
         * Public so that anonymous devices can be destroyed.
         */
        virtual ~Device();