c++ - Linux 上找不到 SDL 库

标签 c++ c linux find sdl

我正在尝试编译此代码:

#include "SDL/SDL.h"

int main(void) {

    SDL_Surface *Hello = NULL;
    SDL_Surface *Screen = NULL;

    SDL_Init( SDL_INIT_EVERYTHING );

    return 0;
}

但是编译器恰好这么说:

undefined reference to SDL_Init

我不知道为什么会发生这种情况。我正在使用 Debian Mint 和 Code::Blocks。你可以帮帮我吗? 我已经从官网下载了sdl库。

编译器正在查找库,但他只是找不到这些函数。我不知道为什么。函数在文件中。

/*
    SDL - Simple DirectMedia Layer
    Copyright (C) 1997-2012 Sam Lantinga

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
    License as published by the Free Software Foundation; either
    version 2.1 of the License, or (at your option) any later version.

    This library is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public
    License along with this library; if not, write to the Free Software
    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

    Sam Lantinga
    slouken@libsdl.org
*/

/** @file SDL.h
 *  Main include header for the SDL library
 */

#ifndef _SDL_H
#define _SDL_H

#include "SDL_main.h"
#include "SDL_stdinc.h"
#include "SDL_audio.h"
#include "SDL_cdrom.h"
#include "SDL_cpuinfo.h"
#include "SDL_endian.h"
#include "SDL_error.h"
#include "SDL_events.h"
#include "SDL_loadso.h"
#include "SDL_mutex.h"
#include "SDL_rwops.h"
#include "SDL_thread.h"
#include "SDL_timer.h"
#include "SDL_video.h"
#include "SDL_version.h"

#include "begin_code.h"
/* Set up for C function definitions, even when using C++ */
#ifdef __cplusplus
extern "C" {
#endif

/** @file SDL.h
 *  @note As of version 0.5, SDL is loaded dynamically into the application
 */

/** @name SDL_INIT Flags
 *  These are the flags which may be passed to SDL_Init() -- you should
 *  specify the subsystems which you will be using in your application.
 */
/*@{*/
#define SDL_INIT_TIMER      0x00000001
#define SDL_INIT_AUDIO      0x00000010
#define SDL_INIT_VIDEO      0x00000020
#define SDL_INIT_CDROM      0x00000100
#define SDL_INIT_JOYSTICK   0x00000200
#define SDL_INIT_NOPARACHUTE    0x00100000  /**< Don't catch fatal signals */
#define SDL_INIT_EVENTTHREAD    0x01000000  /**< Not supported on all OS's */
#define SDL_INIT_EVERYTHING 0x0000FFFF
/*@}*/

/** This function loads the SDL dynamically linked library and initializes 
 *  the subsystems specified by 'flags' (and those satisfying dependencies)
 *  Unless the SDL_INIT_NOPARACHUTE flag is set, it will install cleanup
 *  signal handlers for some commonly ignored fatal signals (like SIGSEGV)
 */
extern DECLSPEC int SDLCALL SDL_Init(Uint32 flags);

/** This function initializes specific SDL subsystems */
extern DECLSPEC int SDLCALL SDL_InitSubSystem(Uint32 flags);

/** This function cleans up specific SDL subsystems */
extern DECLSPEC void SDLCALL SDL_QuitSubSystem(Uint32 flags);

/** This function returns mask of the specified subsystems which have
 *  been initialized.
 *  If 'flags' is 0, it returns a mask of all initialized subsystems.
 */
extern DECLSPEC Uint32 SDLCALL SDL_WasInit(Uint32 flags);

/** This function cleans up all initialized subsystems and unloads the
 *  dynamically linked library.  You should call it upon all exit conditions.
 */
extern DECLSPEC void SDLCALL SDL_Quit(void);

/* Ends C function definitions when using C++ */
#ifdef __cplusplus
}
#endif
#include "close_code.h"

#endif /* _SDL_H */

我如何将其链接到什么?我尝试从 SDL 文件夹中获取扩展名为 .so 和 .a 的文件。他们都没有成功。

最佳答案

您需要链接您的库。在项目 -> 构建选项 -> 链接器 -> 其他链接器选项下的 code::blocks 编译器中,您需要通过在文本字段中键入 -lSDL 来链接 SDL 库。对于任何其他库都是一样的。与 SDL_image 一样,您需要输入 -lSDL_image。

供将来引用:

  1. 对于 SDL GFX,请使用 -lSDL_gfx
  2. OpenGl 使用:-lGLU && -lGL
  3. 用于 OpenGL 的 DevIL *按此顺序: -lIL, -lILU, -lILUT

关于c++ - Linux 上找不到 SDL 库,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/17846789/

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