我是一个初学者,我试图让SDL2发挥作用,但失败了。 我在youtube和google上搜索过,但没有任何效果。我在与main.cpp相同的文件夹中有SDL2.dll 我的cmake文件如下所示:
cmake_minimum_required(VERSION 3.8)
project(sdlTest)
set(CMAKE_CXX_STANDARD 17)
set(SOURCE_FILES main.cpp)
add_executable(sdlTest ${SOURCE_FILES})
add_library(SDL2.dll SHARED main.cpp)
set_target_properties(SDL2.dll PROPERTIES LINKER_LANGUAGE CXX)
我不知道我在做什么错。
我尝试从sdl运行此示例代码:
#include "SDL2/SDL.h"
#include <stdio.h>
int main(int argc, char* argv[]) {
SDL_Window *window; // Declare a pointer
SDL_Init(SDL_INIT_VIDEO); // Initialize SDL2
// Create an application window with the following settings:
window = SDL_CreateWindow(
"An SDL2 window", // window title
SDL_WINDOWPOS_UNDEFINED, // initial x position
SDL_WINDOWPOS_UNDEFINED, // initial y position
640, // width, in pixels
480, // height, in pixels
SDL_WINDOW_OPENGL // flags - see below
);
// Check that the window was successfully created
if (window == NULL) {
// In the case that the window could not be made...
printf("Could not create window: %s\n", SDL_GetError());
return 1;
}
// The window is open: could enter program loop here (see SDL_PollEvent())
SDL_Delay(3000); // Pause execution for 3000 milliseconds, for example
// Close and destroy the window
SDL_DestroyWindow(window);
// Clean up
SDL_Quit();
return 0;
}
我得到这个错误:
CMakeFiles\sdlTest.dir/objects.a(main.cpp.obj): In function `SDL_main':
C:/Users/Dddsasul/CLionProjects/sdlTest/main.cpp:8: undefined reference to
`SDL_Init'
C:/Users/Dddsasul/CLionProjects/sdlTest/main.cpp:18: undefined reference to
`SDL_CreateWindow'
C:/Users/Dddsasul/CLionProjects/sdlTest/main.cpp:23: undefined reference to
`SDL_GetError'
C:/Users/Dddsasul/CLionProjects/sdlTest/main.cpp:29: undefined reference to
`SDL_Delay'
C:/Users/Dddsasul/CLionProjects/sdlTest/main.cpp:32: undefined reference to
`SDL_DestroyWindow'
C:/Users/Dddsasul/CLionProjects/sdlTest/main.cpp:35: undefined reference to
`SDL_Quit'
c:/mingw/bin/../lib/gcc/mingw32/5.3.0/../../../libmingw32.a(main.o):
(.text.startup+0xa0): undefined reference to `WinMain@16'
collect2.exe: error: ld returned 1 exit status
mingw32-make.exe[3]: *** [sdlTest.exe] Error 1
CMakeFiles\sdlTest.dir\build.make:95: recipe for target 'sdlTest.exe' failed
CMakeFiles\Makefile2:103: recipe for target 'CMakeFiles/sdlTest.dir/all'
failed
CMakeFiles\Makefile2:115: recipe for target 'CMakeFiles/sdlTest.dir/rule'
failed
mingw32-make.exe[2]: *** [CMakeFiles/sdlTest.dir/all] Error 2
mingw32-make.exe[1]: *** [CMakeFiles/sdlTest.dir/rule] Error 2
mingw32-make.exe: *** [sdlTest] Error 2
Makefile:130: recipe for target 'sdlTest' failed
我已经尝试过x64和x86,结果都是一样的,但同时clion并没有将代码变成红色,它认为还可以:
任何想法我在做什么错以及如何解决?谢谢!
编辑:
Cmake看起来像这样
cmake_minimum_required(VERSION 3.8)
project(sdlTest)
set(CMAKE_CXX_STANDARD 17)
set(CMAKE_MODULE_PATH ${PROJECT_SOURCE_DIR}/cmake)
find_package(SDL2 REQUIRED)
set(SOURCE_FILES main.cpp)
add_executable(sdlTest ${SOURCE_FILES})
set(SDL2_LIBRARY SDL2.dll)
target_link_libraries(sdlTest ${SDL2_LIBRARYS})
我收到此错误:
Found package configuration file:
C:/MinGW/lib/cmake/SDL2/sdl2-config.cmake
but it set SDL2_FOUND to FALSE so package "SDL2" is considered to be NOT
FOUND.
第二编辑:
sdl2-config.cmake:
# sdl2 cmake project-config input for ./configure scripts
set(prefix "/usr/local/x86_64-w64-mingw32")
set(exec_prefix "${prefix}")
set(libdir "${exec_prefix}/lib")
set(SDL2_PREFIX "/usr/local/x86_64-w64-mingw32")
set(SDL2_EXEC_PREFIX "/usr/local/x86_64-w64-mingw32")
set(SDL2_LIBDIR "${exec_prefix}/lib")
set(SDL2_INCLUDE_DIRS "${prefix}/include/SDL2")
set(SDL2_LIBRARIES "-L${SDL2_LIBDIR} -lmingw32 -lSDL2main -lSDL2 -mwindows")
string(STRIP "${SDL2_LIBRARIES}" SDL2_LIBRARIES)