大佬教程收集整理的这篇文章主要介绍了c – 使用CMake的OpenGL Qt，大佬教程大佬觉得挺不错的，现在分享给大家，也给大家做个参考。
>程序的内存消耗从使用* .pro文件的20-50MB传递到使用CMake的1.3GB(也许某些库被完全加载或者什么？)
>与使用* .pro文件的速度(大约每秒3帧)相比,程序运行速度非常慢(如每5-10秒一帧)
问题是,我做错了什么以及如何解决？
这是* .pro文件：
QT += core gui opengl TARGET = RGBD_3D_Viewer TEMPLATE = app sourcES += main.cpp\ mainwindow.cpp \ glwidget.cpp \ glwidget_Camera.cpp \ glwidget_Comm.cpp \ glwidget_Extractors.cpp \ glwidget_Rendering.cpp \ glwidget_Video.cpp \ glwidget_UI_Mouse.cpp \ glwidget_OpenGl.cpp \ mainwindow_Comm.cpp \ mainwindow_GUI.cpp \ model.cpp \ cameraSet.cpp \ model_Mesh.cpp \ model_Skeleton.cpp \ model_Skin.cpp \ model_Extra_Skinningstuff.cpp \ animation.cpp \ animation_Transform.cpp \ videoSequence.cpp \ sequence.cpp \ mainwindow_UI_Keyboard_Mouse.cpp \ tracker.cpp \ mainwindow_Framenumber.cpp \ model_Limits.cpp \ animation_Files_CompleteSequence.cpp \ mainwindow_MODELS_INFO.cpp \ modelSET.cpp \ animation_0_RotAxes_Limits.cpp \ mymATH.cpp \ types_BACkground.cpp \ model_Extra_VOI.cpp \ fingertipSet.cpp \ tracker_OnIndexChange.cpp \ tracker_wFeatureSet.cpp HEADERS += mainwindow.h \ glwidget.h \ model.h \ cameraSet.h \ animation.h \ videoSequence.h \ sequence.h \ tracker.h \ mymath.h \ modelSET.h \ ui_mainwindow.h \ featureSet.h \ typesBACkground.h \ fingertipSet.h FORMS += mainwindow.ui INCLUDEPATH += /usr/include/eigen3/ INCLUDEPATH += /home/cvg11/projects/development/RGBD_3D_Viewer/glm LIBS += -L/usr/local/lib/ LIBS += -lopencv_core LIBS += -lopencv_highgui QMAKE_CXXFLAGS += -O3 QMAKE_CXXFLAGS += -frounding-math #QMAKE_CXXFLAGS += -std=c++0x
project(3d_viewer) cmake_minimum_required(VERSION 2.6 FATAL_ERROR) include_directories(${CR_99_11845@AKE_CURRENT_BINARY_DIR}) include_directories( ${PROjeCT_sourcE_DIR}/include ${PROjeCT_sourcE_DIR}/glm) find_package( PkgConfig ) pkg_check_modules( EIGEN3 required eigen3 ) include_directories( ${EIGEN3_INCLUDE_DIRS} ) # Opencv required find_package(OpenCV COMPONENTS core highgui required) include_directories(${OPENCV_INCLUDE_DIRS}) link_directories(${OPENCV_LIBRARY_DIRS}) add_deFinitions(${OPENCV_DEFinitioNS}) message("\n\nFound OpenCV\n\n") # QT4 required find_package(Qt4 COMPONENTS QtCore QtGui QtOpenGL required) set(QT_USE_QTOPENGL TRUE) include(${QT_USE_FILE}) add_deFinitions(${QT_DEFinitioNS}) message("\n\nFound QT4\n\n") INCLUDE_DIRECTORIES(${QT_QTOPENGL_INCLUDE_DIR} ${OPENGL_INCLUDE_DIR} ) #set the default path for built executables to the "bin" directory set(EXECUTABLE_OUTPUT_PATH ${PROjeCT_sourcE_DIR}/bin) #set the default path for built libraries to the "lib" directory set(LIBRARY_OUTPUT_PATH ${PROjeCT_sourcE_DIR}/lib) file(GLOB VIEWER_sourcES src/*.cpp) file(GLOB VIEWER_INCLUDES include/*.h) # set QT headers SET(QT_HEADERS include/mainwindow.h include/glwidget.h ) #set QT forms SET(QT_FORMS ui/mainwindow.ui ) # create moc for QT QT4_WRAP_CPP(QT_MOC ${QT_HEADERS}) # process ui QT4_WRAP_UI(QT_FORMS_HEADERS ${QT_FORMS}) ADD_EXECUTABLE(3d_viewer ${VIEWER_sourcES} ${VIEWER_INCLUDES} ${QT_HEADERS} ${QT_MOC} ${QT_FORMS}) TARGET_LINK_LIBRARIES(3d_viewer ${QT_LIBRARIES} ${OpenCV_LIBS} ) set_property(TARGET 3d_viewer PROPERTY COMPILE_DEFinitioNS QT_SHARED)
编辑：
以下是make VERBOSE = 1的两个输出(我只显示最后一个链接和其中一个文件,因为其余文件是相同的)
CMake的：
[100%] Building CXX object CMakeFiles/3d_viewer.dir/include/moc_glwidget.cxx.o /usr/bin/c++ -DQT_CORE_LIB -DQT_GUI_LIB -DQT_NO_DEBUG -DQT_OPENGL_LIB -DQT_SHARED -O3 -DNDEBUG -I/home/cvg11/projects/development/RGBD_3D_Viewer/build -I/home/cvg11/projects/development/RGBD_3D_Viewer/include -I/home/cvg11/projects/development/RGBD_3D_Viewer/glm -I/usr/include/eigen3 -I/usr/local/include/opencv -I/usr/local/include -isystem /usr/include/qt4 -isystem /usr/include/qt4/QtOpenGL -isystem /usr/include/qt4/QtGui -isystem /usr/include/qt4/QtCore -o CMakeFiles/3d_viewer.dir/include/moc_glwidget.cxx.o -c /home/cvg11/projects/development/RGBD_3D_Viewer/build/include/moc_glwidget.cxx Linking CXX executable ../bin/3d_viewer /usr/local/bin/cmake -E cmake_link_script CMakeFiles/3d_viewer.dir/link.txt --verbose=1 /usr/bin/c++ -O3 -DNDEBUG CMakeFiles/3d_viewer.dir/src/mainwindow_Framenumber.cpp.o CMakeFiles/3d_viewer.dir/src/animation.cpp.o CMakeFiles/3d_viewer.dir/src/glwidget_OpenGl.cpp.o CMakeFiles/3d_viewer.dir/src/main.cpp.o CMakeFiles/3d_viewer.dir/src/mainwindow_Comm.cpp.o CMakeFiles/3d_viewer.dir/src/glwidget_Comm.cpp.o CMakeFiles/3d_viewer.dir/src/mymATH.cpp.o CMakeFiles/3d_viewer.dir/src/model.cpp.o CMakeFiles/3d_viewer.dir/src/glwidget_Rendering.cpp.o CMakeFiles/3d_viewer.dir/src/model_Extra_VOI.cpp.o CMakeFiles/3d_viewer.dir/src/videoSequence.cpp.o CMakeFiles/3d_viewer.dir/src/cameraSet.cpp.o CMakeFiles/3d_viewer.dir/src/model_Extra_Skinningstuff.cpp.o CMakeFiles/3d_viewer.dir/src/mainwindow_MODELS_INFO.cpp.o CMakeFiles/3d_viewer.dir/src/animation_0_RotAxes_Limits.cpp.o CMakeFiles/3d_viewer.dir/src/modelSET.cpp.o CMakeFiles/3d_viewer.dir/src/glwidget_Video.cpp.o CMakeFiles/3d_viewer.dir/src/animation_Transform.cpp.o CMakeFiles/3d_viewer.dir/src/glwidget_Camera.cpp.o CMakeFiles/3d_viewer.dir/src/sequence.cpp.o CMakeFiles/3d_viewer.dir/src/animation_Files_CompleteSequence.cpp.o CMakeFiles/3d_viewer.dir/src/glwidget_UI_Mouse.cpp.o CMakeFiles/3d_viewer.dir/src/model_Skin.cpp.o CMakeFiles/3d_viewer.dir/src/tracker_wFeatureSet.cpp.o CMakeFiles/3d_viewer.dir/src/tracker_OnIndexChange.cpp.o CMakeFiles/3d_viewer.dir/src/mainwindow.cpp.o CMakeFiles/3d_viewer.dir/src/types_BACkground.cpp.o CMakeFiles/3d_viewer.dir/src/glwidget_Extractors.cpp.o CMakeFiles/3d_viewer.dir/src/model_Limits.cpp.o CMakeFiles/3d_viewer.dir/src/model_Skeleton.cpp.o CMakeFiles/3d_viewer.dir/src/tracker.cpp.o CMakeFiles/3d_viewer.dir/src/model_Mesh.cpp.o CMakeFiles/3d_viewer.dir/src/mainwindow_UI_Keyboard_Mouse.cpp.o CMakeFiles/3d_viewer.dir/src/fingertipSet.cpp.o CMakeFiles/3d_viewer.dir/src/mainwindow_GUI.cpp.o CMakeFiles/3d_viewer.dir/src/glwidget.cpp.o CMakeFiles/3d_viewer.dir/include/moc_mainwindow.cxx.o CMakeFiles/3d_viewer.dir/include/moc_glwidget.cxx.o -o ../bin/3d_viewer -L/usr/local/cuda/lib64 -rdynamic -lglut -lXmu -lXi -lQtOpenGL -lQtGui -lQtCore /usr/local/lib/libopencv_core.so.2.4.9 /usr/local/lib/libopencv_highgui.so.2.4.9 /usr/local/lib/libopencv_core.so.2.4.9 -Wl,-rpath,/usr/local/cuda/lib64:/usr/local/lib -Wl,-rpath-link,/usr/local/lib make[2]: Leaving directory `/home/cvg11/projects/development/RGBD_3D_Viewer/build' /usr/local/bin/cmake -E cmake_progress_report /home/cvg11/projects/development/RGBD_3D_Viewer/build/CMakeFiles 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 [100%] Built target 3d_viewer
* .pro项目：
g++ -c -pipe -frounding-math -O3 -O2 -w -D_REENTRANT -DQT_WEBKIT -DQT_OPENGL_LIB -DQT_GUI_LIB -DQT_CORE_LIB -DQT_SHARED -I/usr/share/qt4/mkspecs/linux-g++ -I. -I/usr/include/qt4/QtCore -I/usr/include/qt4/QtGui -I/usr/include/qt4/QtOpenGL -I/usr/include/qt4 -I/usr/include/eigen3 -I../../projects/development/RGBD_3D_Viewer/glm -I/usr/X11R6/include -I. -I. -o moc_mainwindow.o moc_mainwindow.cpp /usr/bin/moc-qt4 -DQT_WEBKIT -DQT_OPENGL_LIB -DQT_GUI_LIB -DQT_CORE_LIB -DQT_SHARED -I/usr/share/qt4/mkspecs/linux-g++ -I. -I/usr/include/qt4/QtCore -I/usr/include/qt4/QtGui -I/usr/include/qt4/QtOpenGL -I/usr/include/qt4 -I/usr/include/eigen3 -I../../projects/development/RGBD_3D_Viewer/glm -I/usr/X11R6/include -I. -I. glwidget.h -o moc_glwidget.cpp g++ -c -pipe -frounding-math -O3 -O2 -w -D_REENTRANT -DQT_WEBKIT -DQT_OPENGL_LIB -DQT_GUI_LIB -DQT_CORE_LIB -DQT_SHARED -I/usr/share/qt4/mkspecs/linux-g++ -I. -I/usr/include/qt4/QtCore -I/usr/include/qt4/QtGui -I/usr/include/qt4/QtOpenGL -I/usr/include/qt4 -I/usr/include/eigen3 -I../../projects/development/RGBD_3D_Viewer/glm -I/usr/X11R6/include -I. -I. -o moc_glwidget.o moc_glwidget.cpp g++ -Wl,-O1 -o RGBD_3D_Viewer main.o mainwindow.o glwidget.o glwidget_Camera.o glwidget_Comm.o glwidget_Extractors.o glwidget_Rendering.o glwidget_Video.o glwidget_UI_Mouse.o glwidget_OpenGL.o mainwindow_Comm.o mainwindow_GUI.o model.o cameraSet.o model_Mesh.o model_Skeleton.o model_Skin.o model_Extra_Skinningstuff.o animation.o animation_Transform.o videoSequence.o sequence.o mainwindow_UI_Keyboard_Mouse.o tracker.o mainwindow_Framenumber.o model_Limits.o animation_Files_CompleteSequence.o mainwindow_MODELS_INFo.o modelSET.o animation_0_RotAxes_Limits.o mymATH.o types_BACkground.o model_Extra_VOI.o fingertipSet.o tracker_OnIndexChange.o tracker_wFeatureSet.o moc_mainwindow.o moc_glwidget.o -L/usr/lib/x86_64-linux-gnu -L/usr/X11R6/lib -L/usr/local/lib/ -lopencv_core -lopencv_highgui -lQtOpenGL -lQtGui -lQtCore -lGL -lpthread
QMAKE_CXXFLAGS += -O3
这一行的问题是g将默认使用-O2作为编译阶段,-O1作为链接阶段.您似乎只想更改编译器阶段,因为您没有指定链接器标志.但是,=表示使用qmake添加,而不是覆盖.实现原始目标的正确方法是：
QMAKE_CXXFLAGS_RELEASE -= -O2 QMAKE_CXXFLAGS_RELEASE += -O3
以及以下行来覆盖链接器阶段：
QMAKE_LFLAGS_RELEASE -= -O1
在此更改后,您自然需要重新运行qmake.现在,-O3意味着它将优化性能而不是空间.因此,您之前对空间的关注可能是由此造成的.然而,第二部分仍然有问题,没有具体细节.
cmake的默认优化级别与qmake不同;它是-O3.您可以通过运行以下简短的cmake代码段轻松检查：
message("CMAKE_CXX_FLAGS_RELEASE: ${CR_99_11845@AKE_CXX_FLAGS_RELEASE}")
您需要同步它们以使它们内联.例如,如果你想在任何地方使用-O2,也要覆盖cmake,你需要应用以下内容：
set(CMAKE_CXX_FLAGS_RELEASE "-O2")
如果您想使用-O3,请参阅上述逻辑以在qmake项目文件中更改它.如果您想使用其他类似-Os,则需要应用这两种类型的更改.我想,这几乎就是它.
至于调试,您可能希望在两种情况下完全实现优化,以获得更好的调试体验！
通常,您需要决定性能与空间特性.你似乎在抱怨两者,但你天生就不会在两者上都获得完美主义.如果要完全优化空间,请使用-Os,如果要获得性能,请使用-O3,如果需要妥协解决方案,请使用介于两者之间的内容等.
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