在 QtCreator 中链接 SDL2

Question

所以我想使用 Qt 作为我的 SDL 应用程序的编辑器。当我尝试在 Qt 中创建一个空白项目并链接库时，它就是找不到 SDL2/SDL.h。这是我的 .pro 文件中的内容：

mac: LIBS += "-F$$PWD/../Control Libraries/" -framework SDL2
INCLUDEPATH += "$$PWD/../Control Libraries/SDL2.framework/Versions/A/Headers"


mac: LIBS += "-F$$PWD/../Control Libraries/" -framework SDL2_mixer
INCLUDEPATH += "$$PWD/../Control Libraries/SDL2_mixer.framework/Versions/A/Headers"


mac: LIBS += "-F$$PWD/../Control Libraries/" -framework SDL2_ttf
INCLUDEPATH += "$$PWD/../Control Libraries/SDL2_ttf.framework/Versions/A/Headers"

我找不到任何人发布了如何让它工作的帖子，但我知道必须有一些方法。它一键在 Xcode 中工作，所以我只是做错了什么吗？谢谢。

编辑：

这里是错误信息：

    /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang++ -c -pipe -g -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.8.sdk -mmacosx-version-min=10.6 -Wall -W -fPIE -DQT_WIDGETS_LIB -DQT_GUI_LIB -DQT_CORE_LIB -I../../../Qt/5.3/clang_64/mkspecs/macx-clang -I../SpudEngineEditor -I../Control\ Libraries/SDL2.framework/Headers -I../Control\ Libraries/SDL2_mixer.framework/Headers -I../Control\ Libraries/SDL2_ttf.framework/Headers -I../../../Qt/5.3/clang_64/lib/QtWidgets.framework/Versions/5/Headers -I../../../Qt/5.3/clang_64/lib/QtGui.framework/Versions/5/Headers -I../../../Qt/5.3/clang_64/lib/QtCore.framework/Versions/5/Headers -I. -I/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.8.sdk/System/Library/Frameworks/OpenGL.framework/Versions/A/Headers -I/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.8.sdk/System/Library/Frameworks/AGL.framework/Headers -I. -I. -F/Users/Logan/Qt/5.3/clang_64/lib -o Camera.o ../SpudEngineEditor/Camera.cpp
In file included from ../SpudEngineEditor/Camera.cpp:9:
In file included from ../SpudEngineEditor/Camera.h:13:
../SpudEngineEditor/CoreEngine.h:14:9: warning: unknown pragma ignored [-Wunknown-pragmas]
#pragma comment (lib, "glu32.lib")
        ^
In file included from ../SpudEngineEditor/Camera.cpp:9:
In file included from ../SpudEngineEditor/Camera.h:13:
In file included from ../SpudEngineEditor/CoreEngine.h:34:
../Control Libraries/SDL2_ttf.framework/Headers/SDL_ttf.h:30:10: fatal error: 'SDL2/SDL.h' file not found
#include <SDL2/SDL.h>

编辑：我已经得到它，所以我可以包含，但不是，这是一个问题，因为 SDL 混音器和 SDL rtf 都使用

Answer 1

路径中有空格时应使用双引号，例如：

INCLUDEPATH += "$$PWD/../Control Libraries/SDL2.framework/Versions/A/Headers"

除非您确实希望它们成为单独的参数，例如：

mac: LIBS += "-F$$PWD/../Control Libraries/" -framework SDL2_mixer

---

问题编辑后：所以你有#include <SDL2/SDl.h>。它似乎有错误的情况，应该是

#include <SDL2/SDL.h>

Answer 2

编译器清楚错误：

../SpudEngineEditor/main.cpp:3:10：致命错误：找不到“SDL2/SDl.h”文件

你应该做的是替换这一行：

#include <SDL2/SDl.h>

与：

#include <SDL2/SDL.h>
//               ^, yes uppercase.

此外，对于带有空格的路径，您应该使用例如为此目的而建立的the corresponding quote qmake function，它也可以在内部使用双引号。双引号也可能在所有情况下都有效，但如果有一个已建立的功能，我个人更喜欢花哨的功能。 :-)

如果我不重复相同的路径几次，我也会建立一个辅助变量。

此外，我会编写一个 qmake 函数，尽管内联调用不需要它，它使用真正的 qmake 功能，for 循环，因为你在重复同样的事情。因此，我会写这样的东西：

setSDLPaths() {
    CONTROL_LIBRARIES_PATH = $$quote($$PWD/../Control Libraries/)
    LIST = SDL2 SDL2_ttf SDL2_mixer
    for(item, LIST) {
        mac: LIBS += -F$$CONTROL_LIBRARIES_PATH -framework $$item
        INCLUDEPATH += $$CONTROL_LIBRARIES_PATH/$${item}.framework/Versions/A/Headers
    }
}

这将大大简化您的代码，基本上是单行：

$$setSDLPaths()