AM3358

解決"error: SDL_SysWMinfo ... has no member named info"

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問題如下：

error: SDL_SysWMinfo {aka struct SDL_SysWMinfo} has no member named info

在CFLAGS加上-DSDL_VIDEO_DRIVER_X11，因為在usr/include/SDL/SDL_syswm.h裡面有使用if隔開定義，如下所示：

/* This is the structure for custom window manager events */
#if defined(SDL_VIDEO_DRIVER_X11)
#if defined(__APPLE__) && defined(__MACH__)
/* conflicts with Quickdraw.h */
#define Cursor X11Cursor
#endif

#include <X11/Xlib.h>
#include <X11/Xatom.h>

#if defined(__APPLE__) && defined(__MACH__)
/* matches the re-define above */
#undef Cursor
#endif

/** These are the various supported subsystems under UNIX */
typedef enum {
  SDL_SYSWM_X11
} SDL_SYSWM_TYPE;

/** The UNIX custom event structure */
struct SDL_SysWMmsg {
  SDL_version version;
  SDL_SYSWM_TYPE subsystem;
  union {
      XEvent xevent;
  } event;
};

/** The UNIX custom window manager information structure.
 *  When this structure is returned, it holds information about which
 *  low level system it is using, and will be one of SDL_SYSWM_TYPE.
 */
typedef struct SDL_SysWMinfo {
  SDL_version version;
  SDL_SYSWM_TYPE subsystem;
  union {
      struct {
        Display *display;  /**< The X11 display */
        Window window;    /**< The X11 display window */
    /** These locking functions should be called around
                 *  any X11 functions using the display variable, 
                 *  but not the gfxdisplay variable.
                 *  They lock the event thread, so should not be
     *  called around event functions or from event filters.
     */
                /*@{*/
    void (*lock_func)(void);
    void (*unlock_func)(void);
                /*@}*/

    /** @name Introduced in SDL 1.0.2 */
                /*@{*/
        Window fswindow;  /**< The X11 fullscreen window */
        Window wmwindow;  /**< The X11 managed input window */
                /*@}*/

    /** @name Introduced in SDL 1.2.12 */
                /*@{*/
    Display *gfxdisplay;  /**< The X11 display to which rendering is done */
                /*@}*/
      } x11;
  } info;
} SDL_SysWMinfo;

#elif defined(SDL_VIDEO_DRIVER_NANOX)
#include <microwin/nano-X.h>

/** The generic custom event structure */
struct SDL_SysWMmsg {
  SDL_version version;
  int data;
};

/** The windows custom window manager information structure */
typedef struct SDL_SysWMinfo {
  SDL_version version ;
  GR_WINDOW_ID window ;  /* The display window */
} SDL_SysWMinfo;

#elif defined(SDL_VIDEO_DRIVER_WINDIB) || defined(SDL_VIDEO_DRIVER_DDRAW) || defined(SDL_VIDEO_DRIVER_GAPI)
#define WIN32_LEAN_AND_MEAN
#include <windows.h>

/** The windows custom event structure */
struct SDL_SysWMmsg {
  SDL_version version;
  HWND hwnd;      /**< The window for the message */
  UINT msg;      /**< The type of message */
  WPARAM wParam;      /**< WORD message parameter */
  LPARAM lParam;      /**< LONG message parameter */
};

/** The windows custom window manager information structure */
typedef struct SDL_SysWMinfo {
  SDL_version version;
  HWND window;      /**< The Win32 display window */
  HGLRC hglrc;      /**< The OpenGL context, if any */
} SDL_SysWMinfo;

#elif defined(SDL_VIDEO_DRIVER_RISCOS)

/** RISC OS custom event structure */
struct SDL_SysWMmsg {
  SDL_version version;
  int eventCode;    /**< The window for the message */
  int pollBlock[64];
};

/** The RISC OS custom window manager information structure */
typedef struct SDL_SysWMinfo {
  SDL_version version;
  int wimpVersion;    /**< Wimp version running under */
  int taskHandle;     /**< The RISC OS task handle */
  int window;    /**< The RISC OS display window */
} SDL_SysWMinfo;

#elif defined(SDL_VIDEO_DRIVER_PHOTON)
#include <sys/neutrino.h>
#include <Ph.h>

/** The QNX custom event structure */
struct SDL_SysWMmsg {
  SDL_version version;
  int data;
};

/** The QNX custom window manager information structure */
typedef struct SDL_SysWMinfo {
  SDL_version version;
  int data;
} SDL_SysWMinfo;

#else

/** The generic custom event structure */
struct SDL_SysWMmsg {
  SDL_version version;
  int data;
};

/** The generic custom window manager information structure */
typedef struct SDL_SysWMinfo {
  SDL_version version;
  int data;
} SDL_SysWMinfo;

#endif /* video driver type */

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