在OSX 10.11上使用带有SDL2_IMAGE的SDL2(Clion 1.1中的CMake 3.3)
我正在学习来自reddit.com/r/limeoats的几个教程,以学习一些用C++开发的游戏。我没有使用CMake或Clion的经验,到目前为止我还是设法用谷歌搜索了一下。
在我将OSX更新到El Capitan(10.11)之前,一切都在进行中。似乎我不能再使用#include "SDL2/SDL.h"
,而是需要使用#include "SDL.h"
,这样它才能找到SDL标头。当我还使用#include "SDL_image.h"
时出现问题,我得到以下编译器错误:
/Library/Frameworks/SDL2_image.framework/Headers/SDL_image.h:27:10:
fatal error: 'SDL2/SDL.h' file not found
#include <SDL2/SDL.h>
^
查看My Frameworks文件夹中的头文件,它有#include <SDL2/SDL.h>
,但CMake在将OSX升级到10.11后出于某种原因将其作为SDL.h提供。
下面是我的CMakeLists.txt,我从here获得了FindSDL2.cmake(请注意第50行的注释)和FindSDL2_Image.cmake。
cmake_minimum_required(VERSION 3.3)
project(Cavestory)
set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${PROJECT_SOURCE_DIR}/cmake")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")
set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${PROJECT_SOURCE_DIR}/bin)
include_directories(${PROJECT_SOURCE_DIR}/source/headers)
find_package(SDL2 REQUIRED)
find_package(SDL2_image REQUIRED >=2.0.0)
include_directories(${SDL2_INCLUDE_DIR})
include_directories(${SDL2_IMAGE_INCLUDE_DIR})
file(GLOB SOURCE_FILES "source/src/*.cpp")
add_executable(Cavestory ${SOURCE_FILES})
# One thread said this is all I should need to link SDL2
# but cannot get this to work at all
#target_link_libraries(Cavestory SDL2 SDL2_image)
#add_custom_command(TARGET Cavestory POST_BUILD
# COMMAND ${CMAKE_COMMAND} -E copy_directory
# ${CMAKE_SOURCE_DIR}/content $<TARGET_FILE_DIR:Cavestory>)
和我的目录结构(如果有帮助)...
/Cavestory (root)
CMakeLists.txt
/bin
/cmake
FindSDL2.cmake
FindSDL2_image.cmake
/content
/sprites
**images**
/docs
/source
/headers
**header files**
/src
**code files**
解决方案
我觉得自己很傻...我的CMakeLists.txt文件是正确的,但我需要添加以下内容
target_link_libraries(Cavestory ${SDL2_LIBRARY} ${SDL2_IMAGE_LIBRARY})
而不是
target_link_libraries(Cavestory SDL2 SDL2_image)
这修复了sdl_Image.h中的SDL链接问题;但是,在更新到El Capitan后,我不能再通过#include "SDL2/SDL.h"
引用SDL,而必须使用#include "SDL.h"
--虽然这是首选方法,但我想知道为什么/如何在OSX 10.10和OSX 10.11之间发生变化。
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