我安装了arch linux作为我的操作系统。 我安装了codelite作为我的c ++ IDE。 我已经下载了SDL2。
我试图让SDL与c ++一起工作,但我所做的一切,都没有用。
我已经搜索了几个小时试图让它工作,它只是不想工作。我无法找到库链接器的任何.dll或.a或.so文件。当我在Windows上时,我不得不找到它们并将目录放在链接器设置中,但是我找不到任何.dll' s。现在它识别SDL_Window和SDL_Surface。但是我在尝试构建我的项目时遇到错误的引用...
这是我的源代码:
#include <SDL2/SDL.h>
#include <stdio.h>
const int SCREEN_WIDTH = 640;
const int SCREEN_HEIGHT = 480;
bool init();
bool loadMedia();
void close();
SDL_Window* window = NULL;
SDL_Surface* gScreenSurface = NULL;
SDL_Surface* gHelloWorld = NULL;
bool init() {
bool success = true;
if (SDL_Init(SDL_INIT_VIDEO) < 0) {
printf("SDL could not initialize! SDL Error: %s\n", SDL_GetError());
success = false;
} else {
window = SDL_CreateWindow("SDL Tutorial", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, SCREEN_WIDTH, SCREEN_HEIGHT, SDL_WINDOW_SHOWN);
if (window == NULL) {
printf("Window could not be created! SDL Error: %s\n", SDL_GetError());
success = false;
} else {
gScreenSurface = SDL_GetWindowSurface(window);
}
}
return success;
}
bool loadMedia() {
bool success = true;
gHelloWorld = SDL_LoadBMP("hello_world.bmp");
if (gHelloWorld == NULL) {
printf("Unable to load image %s! SDL Error: %s\n", "hello_world.bmp", SDL_GetError());
success = false;
}
return success;
}
void close() {
SDL_FreeSurface(gHelloWorld);
gHelloWorld = NULL;
SDL_DestroyWindow(window);
window = NULL;
SDL_Quit();
}
int main(int argc, char **argv)
{
if (!init()) {
printf("Failed to initialize!\n");
} else {
if (!loadMedia()) {
printf("Failed to load media!\n");
} else {
SDL_BlitSurface(gHelloWorld, NULL, gScreenSurface, NULL);
SDL_UpdateWindowSurface(window);
SDL_Delay(3000);
}
}
close();
return 0;
}
这是我的输出:
/bin/sh -c '/usr/bin/make -j4 -e -f Makefile'
----------Building project:[ Test - Debug ]----------
make[1]: Entering directory '/home/vinny/Documents/Projects/Test'
/usr/bin/g++ -c "/home/vinny/Documents/Projects/Test/main.cpp" -g -O0 -Wall -o ./Debug/main.cpp.o -I. -I. -I/home/vinny/Downloads/SDL2-2.0.7/include
/usr/bin/g++ -o ./Debug/Test @"Test.txt" -L.
./Debug/main.cpp.o: In function `init()':
/home/vinny/Documents/Projects/Test/main.cpp:17: undefined reference to `SDL_Init'
/home/vinny/Documents/Projects/Test/main.cpp:18: undefined reference to `SDL_GetError'
/home/vinny/Documents/Projects/Test/main.cpp:21: undefined reference to `SDL_CreateWindow'
/home/vinny/Documents/Projects/Test/main.cpp:23: undefined reference to `SDL_GetError'
/home/vinny/Documents/Projects/Test/main.cpp:26: undefined reference to `SDL_GetWindowSurface'
./Debug/main.cpp.o: In function `loadMedia()':
/home/vinny/Documents/Projects/Test/main.cpp:35: undefined reference to `SDL_RWFromFile'
/home/vinny/Documents/Projects/Test/main.cpp:35: undefined reference to `SDL_LoadBMP_RW'
/home/vinny/Documents/Projects/Test/main.cpp:37: undefined reference to `SDL_GetError'
./Debug/main.cpp.o: In function `close()':
/home/vinny/Documents/Projects/Test/main.cpp:45: undefined reference to `SDL_FreeSurface'
/home/vinny/Documents/Projects/Test/main.cpp:48: undefined reference to `SDL_DestroyWindow'
/home/vinny/Documents/Projects/Test/main.cpp:51: undefined reference to `SDL_Quit'
./Debug/main.cpp.o: In function `main':
/home/vinny/Documents/Projects/Test/main.cpp:62: undefined reference to `SDL_UpperBlit'
/home/vinny/Documents/Projects/Test/main.cpp:63: undefined reference to `SDL_UpdateWindowSurface'
/home/vinny/Documents/Projects/Test/main.cpp:64: undefined reference to `SDL_Delay'
collect2: error: ld returned 1 exit status
make[1]: *** [Test.mk:79: Debug/Test] Error 1
make[1]: Leaving directory '/home/vinny/Documents/Projects/Test'
make: *** [Makefile:5: All] Error 2
====14 errors, 0 warnings====
我是Linux操作系统的新手,所以我可能没有尝试过所有的东西。请帮忙。自从我切换到linux后,我还没有能够编程。 :(
答案 0 :(得分:1)
@Aram在评论中说了什么 - 除了它需要-lSDL2
而不是-lSDL
,因为它是SDL2,你包括和编程,而不仅仅是SDL。