Question

我使用QtCreator在Windows上工作。我尝试使用freeglut / opengl2所有libs都已构建并正确安装但是对于所有过剩组件的未定义引用肯定是由于：目标可能仅链接到库。 CMake正在放弃该项目。

这里是我的CMakelists.txt

project(Projet_AIN CXX)
cmake_minimum_required(VERSION 2.8)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11 ")
find_package(GLUT   REQUIRED)
find_package(GLEW   REQUIRED)
find_package(OpenGL REQUIRED)

include_directories(${GLEW_INCLUDE_DIR}
                    ${GLUT_INCLUDE_DIR}
                    ${OpenGL_INCLUDE_DIR})

link_directories(${GLEW_LIBRARIES_DIR}
                 ${GLUT_LIBRARY_DIR}
                 ${OpenGL_LIBRARY_DIR})

add_definitions(${OpenGL_DEFINITIONS}
                ${GLEW_DEFINITIONS}
                ${GLUT_DEFINITIONS})



set(EXECUTABLE_OUTPUT_PATH bin/${CMAKE_BUILD_TYPE})
file(
    GLOB
    SOURCE_FILES
    include/*.hpp
    src/*.cpp
)


add_executable(
        ${PROJECT_NAME}
        ${SOURCE_FILES}
)
target_link_libraries(${PROJECT_NAME}
                  ${OPENGL_LIBRARY}
                  ${GLEW_LIBRARY}
                  ${GLUT_LIBRARY}
                  )

CMake输出：

Running "C:\cmake\bin\cmake.exe C:/Users/Thibaut/Documents/Projet_Raffin "-GCodeBlocks - MinGW Makefiles" "-DCMAKE_BUILD_TYPE:STRING=Debug" "-DCMAKE_CXX_COMPILER:STRING=C:/MinGW/bin/g++.exe" "-DCMAKE_C_COMPILER:STRING=C:/MinGW/bin/gcc.exe" "-DCMAKE_PREFIX_PATH:STRING=%{Qt:QT_INSTALL_PREFIX}" "-DGLEW_INCLUDE_DIR:PATH=C:/Program Files (x86)/glew/include" "-DGLEW_LIBRARY:FILEPATH=C:/Program Files (x86)/glew/lib" "-DGLUT_INCLUDE_DIR:PATH=C:/Program Files (x86)/freeglut/include" "-DGLUT_glut_LIBRARY:FILEPATH=C:/Program Files (x86)/freeglut/lib" "-DQT_QMAKE_EXECUTABLE:STRING="" in C:\Users\Thibaut\Documents\build-Projet_Raffin-Kat-Debug.
-- Configuring done
WARNING: Target "Projet_AIN" requests linking to directory "C:/Program Files (x86)/glew/lib".  Targets may link only to libraries.  CMake is dropping the item.
WARNING: Target "Projet_AIN" requests linking to directory "C:/Program Files (x86)/freeglut/lib".  Targets may link only to libraries.  CMake is dropping the item.
-- Generating done
-- Build files have been written to: C:/Users/Thibaut/Documents/build-Projet_Raffin-Kat-Debug

输出：

14:26:39: Exécution des étapes pour le projet Projet_AIN...
14:26:39: Running CMake in preparation to build...
14:26:39: Débute : "C:\cmake\bin\cmake.exe" --build . --target all
[ 50%] Building CXX object CMakeFiles/Projet_AIN.dir/src/main.cpp.obj
[100%] Linking CXX executable bin\Debug\Projet_AIN.exe
CMakeFiles\Projet_AIN.dir/objects.a(main.cpp.obj): In function `glutInit_ATEXIT_HACK':
C:/PROGRA~2/freeglut/include/GL/freeglut_std.h:637: undefined reference to `__imp___glutInitWithExit'
CMakeFiles\Projet_AIN.dir/objects.a(main.cpp.obj): In function `glutCreateWindow_ATEXIT_HACK':
C:/PROGRA~2/freeglut/include/GL/freeglut_std.h:639: undefined reference to `__imp___glutCreateWindowWithExit'
CMakeFiles\Projet_AIN.dir/objects.a(main.cpp.obj): In function `glutCreateMenu_ATEXIT_HACK':
C:/PROGRA~2/freeglut/include/GL/freeglut_std.h:641: undefined reference to `__imp___glutCreateMenuWithExit'
CMakeFiles\Projet_AIN.dir/objects.a(main.cpp.obj): In function `action_timer(int)':
C:/Users/Thibaut/Documents/Projet_Raffin/src/main.cpp:30: undefined reference to `__imp_glutPostRedisplay'
C:/Users/Thibaut/Documents/Projet_Raffin/src/main.cpp:31: undefined reference to `__imp_glutTimerFunc'
CMakeFiles\Projet_AIN.dir/objects.a(main.cpp.obj): In function `RenderScene()':
C:/Users/Thibaut/Documents/Projet_Raffin/src/main.cpp:71: undefined reference to `__imp_glutWireTeapot'
C:/Users/Thibaut/Documents/Projet_Raffin/src/main.cpp:73: undefined reference to `__imp_glutSwapBuffers'
CMakeFiles\Projet_AIN.dir/objects.a(main.cpp.obj): In function `callback_Keyboard(unsigned char, int, int)':
C:/Users/Thibaut/Documents/Projet_Raffin/src/main.cpp:80: undefined reference to `__imp_glutLeaveMainLoop'
CMakeFiles\Projet_AIN.dir/objects.a(main.cpp.obj): In function `InitializeGL()':
C:/Users/Thibaut/Documents/Projet_Raffin/src/main.cpp:113: undefined reference to `__imp_glutTimerFunc'
CMakeFiles\Projet_AIN.dir/objects.a(main.cpp.obj): In function `GlewInit()':
C:/Users/Thibaut/Documents/Projet_Raffin/src/main.cpp:118: undefined reference to `__imp_glewInit'
C:/Users/Thibaut/Documents/Projet_Raffin/src/main.cpp:122: undefined reference to `__imp_glewGetErrorString'
C:/Users/Thibaut/Documents/Projet_Raffin/src/main.cpp:125: undefined reference to `__imp_glewGetString'
C:/Users/Thibaut/Documents/Projet_Raffin/src/main.cpp:127: undefined reference to `__imp_glewIsSupported'
CMakeFiles\Projet_AIN.dir/objects.a(main.cpp.obj): In function `InitializeGlutCallbacks':
C:/Users/Thibaut/Documents/Projet_Raffin/src/main.cpp:141: undefined reference to `__imp_glutDisplayFunc'
C:/Users/Thibaut/Documents/Projet_Raffin/src/main.cpp:148: undefined reference to `__imp_glutKeyboardFunc'
C:/Users/Thibaut/Documents/Projet_Raffin/src/main.cpp:154: undefined reference to `__imp_glutReshapeFunc'
CMakeFiles\Projet_AIN.dir/objects.a(main.cpp.obj): In function `main':
C:/Users/Thibaut/Documents/Projet_Raffin/src/main.cpp:167: undefined reference to `__imp_glutInitDisplayMode'
C:/Users/Thibaut/Documents/Projet_Raffin/src/main.cpp:169: undefined reference to `__imp_glutInitWindowPosition'
C:/Users/Thibaut/Documents/Projet_Raffin/src/main.cpp:170: undefined reference to `__imp_glutInitWindowSize'
C:/Users/Thibaut/Documents/Projet_Raffin/src/main.cpp:182: undefined reference to `__imp_glutMainLoop'
collect2.exe: error: ld returned 1 exit status
mingw32-make.exe[2]: *** [CMakeFiles\Projet_AIN.dir\build.make:97: bin/Debug/Projet_AIN.exe] Error 1
mingw32-make.exe[1]: *** [CMakeFiles\Makefile2:67: CMakeFiles/Projet_AIN.dir/all] Error 2
mingw32-make.exe: *** [Makefile:83: all] Error 2
14:26:42: Le processus "C:\cmake\bin\cmake.exe" s'est terminé avec le code 2.
Erreur lors de la compilation/déploiement du projet Projet_AIN (kit : Kat)
When executing step "Make"

Answer 1

由find_package(XXX)调用的脚本的现代方式是包含变量的名称库XXX_LIBRARIES。

对于XXX_LIBRARY变量，它有时指的是相同的（库列表），或者带有库的目录。看起来第二种情况是你的，这就是你得到这个错误的原因。

如果您想知道find_package(XXX)设置的变量名称，请参阅that question。

Answer 2

你的链接命令应该是

target_link_libraries(${PROJECT_NAME}
                  ${OPENGL_LIBRARIES}
                  ${GLEW_LIBRARIES}
                  ${GLUT_LIBRARIES}
                  )

此外，link_directories（）和add_definitions（）命令是不必要的由于您要在target_link_libraries（）中提供库的完整路径，因此无需再次提供目录。

要检查find_package（）命令设置的变量，请在CMake文档中查看该包的文档。例如，OpenGL页面为here。

Answer 3

从根本上讲，要摆脱Targets may link only to libraries.CMake is dropping the item.错误，您需要尝试仅链接lib的路径，而不链接lib目录。

例如：

如果您指定以下内容，则会发生此错误：

FREETYPE_LIBRARY_REL = H:\OgreSDK_vc9_v1-7-1\lib\release

您需要指定.lib的路径：

FREETYPE_LIBRARY_REL = H:\OgreSDK_vc9_v1-7-1\lib\release\freetype.lib

感谢Link

CMake正在删除项目c ++

3 个答案: