SDL2项目在mingw上建立，但使用CLION不基于Cygwin

Question

我正在使用sdl2和clion在Windows 10上构建一个测试项目。我正在使用Findsdl2.cmake和Findsdl2_ttf.cmake脚本。我的cmakelists.txt文件如下：

cmake_minimum_required(VERSION 3.6)
project(HelloSDL)
set(CMAKE_CXX_STANDARD 11)
set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${HelloSDL_SOURCE_DIR}/cmake")
set(SDL2_PATH "C:\SDL\SDL2-2.0.5\i686-w64-mingw32" CACHE PATH "The location to search for SDL2")
set(SDL2_TTF_PATH "C:\SDL\SDL2_ttf-2.0.14\i686-w64-mingw32" CACHE PATH "The location to search for SDL2_TTF")
find_package(SDL2 REQUIRED)
include_directories(${SDL2_INCLUDE_DIR})
find_package(SDL2_ttf REQUIRED)
include_directories(${SDL2_TTF_INCLUDE_DIR})
include_directories(include)
set(SOURCE_FILES main.cpp)
add_executable(HelloSDL ${SOURCE_FILES})
target_link_libraries(HelloSDL ${SDL2_LIBRARY} ${SDL2_TTF_LIBRARY})

该项目在mingw下构建并运行良好，但是当我尝试在cygwin下构建它时，我会得到链接错误：

CMakeFiles/HelloSDL.dir/main.cpp.o: In function `SDL_main':
/cygdrive/c/Users/Kieran/CLionProjects/HelloSDL/main.cpp:97: undefined reference to `SDL_Init'
/cygdrive/c/Users/Kieran/CLionProjects/HelloSDL/main.cpp:102: undefined reference to `TTF_Init'
/cygdrive/c/Users/Kieran/CLionProjects/HelloSDL/main.cpp:104: undefined reference to `SDL_Quit'
/cygdrive/c/Users/Kieran/CLionProjects/HelloSDL/main.cpp:109: undefined reference to `SDL_CreateWindow'
/cygdrive/c/Users/Kieran/CLionProjects/HelloSDL/main.cpp:113: undefined reference to `TTF_Quit'
/cygdrive/c/Users/Kieran/CLionProjects/HelloSDL/main.cpp:114: undefined reference to `SDL_Quit'
/cygdrive/c/Users/Kieran/CLionProjects/HelloSDL/main.cpp:117: undefined reference to `SDL_CreateRenderer'
/cygdrive/c/Users/Kieran/CLionProjects/HelloSDL/main.cpp:121: undefined reference to `TTF_Quit'
/cygdrive/c/Users/Kieran/CLionProjects/HelloSDL/main.cpp:122: undefined reference to `SDL_Quit'
/cygdrive/c/Users/Kieran/CLionProjects/HelloSDL/main.cpp:133: undefined reference to `TTF_Quit'
/cygdrive/c/Users/Kieran/CLionProjects/HelloSDL/main.cpp:134: undefined reference to `SDL_Quit'
/cygdrive/c/Users/Kieran/CLionProjects/HelloSDL/main.cpp:140: undefined reference to `SDL_QueryTexture'
/cygdrive/c/Users/Kieran/CLionProjects/HelloSDL/main.cpp:148: undefined reference to `SDL_PollEvent'
/cygdrive/c/Users/Kieran/CLionProjects/HelloSDL/main.cpp:156: undefined reference to `SDL_RenderClear'
/cygdrive/c/Users/Kieran/CLionProjects/HelloSDL/main.cpp:160: undefined reference to `SDL_RenderPresent'
/cygdrive/c/Users/Kieran/CLionProjects/HelloSDL/main.cpp:164: undefined reference to `TTF_Quit'
/cygdrive/c/Users/Kieran/CLionProjects/HelloSDL/main.cpp:165: undefined reference to `SDL_Quit'

我没有很多经验，但是对我来说，这表明它没有与SDL2库相连。我很困惑为什么何时CMAKE输出指示它找到了SDL2库：

-- Found SDL2: C:/SDL/SDL2-2.0.5/i686-w64-mingw32/lib/libSDL2main.a;C:/SDL/SDL2-2.0.5/i686-w64-mingw32/lib/libSDL2.dll.a  

在试图将其编译为Cygwin下的任何帮助。

Answer 1

首先，您需要使用cygwin（libsdl2*-devel）的库，而不是您为mingw下载的库，您还需要使用msys格式使用cmake生成makefile。

cmake -g" msys makefiles"