我在windows上通过VMware在ubuntu 15.10上安装了opencv,qt,qt creator,cmake。
opencv安装在以下目录中:/home/majidalaeinia/opencv/
project repository被克隆在这个目录中:/home/majidalaeinia/Desktop/imgwarp-opencv/
我想通过qt creator中的the project运行CMakeLists.txt,当我在qt creator上按下Build时,我收到以下错误:
error: cannot find -lopencv_imgcodecs
error: collect2: error: ld returned 1 exit status
问题在哪里,我该如何解决?
@ Majid Alaeinia,我上传了存储库并完成了代码。如果你进入demo
文件夹并且你用我在下面提供的文件更改了当前的CMakeLists.txt
文件,它应该编译(它在我的编译中提供了所提供的更改):
project(demo)
cmake_minimum_required(VERSION 2.6)
find_package(Qt5 REQUIRED COMPONENTS Widgets Core)
FIND_PACKAGE( OpenCV REQUIRED )
include_directories(${QT_INCLUDES} ${CMAKE_CURRENT_BINARY_DIR} ${CMAKE_SOURCE_DIR}/lib ${CMAKE_CURRENT_SOURCE_DIR})
set(demo_SRCS main.cpp projfile.cpp deformwin.cpp myimage.cpp singlephotoview.cpp pointspaint.cpp)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")
set(CMAKE_INCLUDE_CURRENT_DIR ON)
#qt5_automoc(${demo_SRCS})
QT5_WRAP_CPP(QOBJ_CPP ${demo_SRCS})
qt5_wrap_ui(helloworld_FORMS_HEADERS deformwin.ui)
add_executable(demo ${demo_SRCS} ${helloworld_FORMS_HEADERS})
target_link_libraries(demo ${QT_QTCORE_LIBRARY} ${QT_QTGUI_LIBRARY} imgwarp-lib opencv_core opencv_imgproc opencv_imgcodecs)
存储库中的代码是一个旧代码,仍然将Qt4
作为主要包装器。我想你可能已经在你的计算机上安装了Qt5
,事实上我提供的代码将适用于Qt5
。使用它作为CMakeLists.txt
文件夹中存在的其他src
文件的指南,并相应地更改。
CMake
将编译,但因为它使用Qt4
你需要找出最重要的模块添加,例如包括QtGui/QApplication
的新标准通常被QtWidgets/QApplication
取代
我还想留下我之前的答案,以防你需要一个起点或一个初始模板。我希望这可以澄清一点,并且可以让你继续推进你的项目。
来自您发布的CMakeLists.txt
文件中的@ Majid Alaeinia未指定CMAKE
应如何找到您项目中请求的库。也没有宣布target_link_libraries
所以CMAKE
不知道在哪里链接他们。希望以下小示例模板对您的项目有所帮助:
cmake_minimum_required (VERSION 3.1)
project(yourProject)
find_package( OpenCV REQUIRED )
find_package( Qt5 REQUIRED COMPONENTS Sql )
### this is for c++11
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")
set(CMAKE_INCLUDE_CURRENT_DIR ON)
### QT stuff if you want a GUI
set(CMAKE_AUTOMOC ON) # autogenerate qt gui features
set(CMAKE_AUTORCC ON) # used for QT resource Files (if you need)
## Additional operation...
# From here you are specifically linking all OpenCV libraries and executables
### Add executables
add_executable(yourExecutable main/main.cpp ui/res/res.qrc ${SRCS} ${UI_HDRS} ${UI_SRCS})
target_link_libraries (yourProject example Qt5::Widgets ${OpenCV_LIBS} Qt5::Sql)
### Add Library
add_library(yourProject_lib SHARED ${SRCS} ${UI_HDRS})
target_link_libraries (yourProject_lib example Qt5::Widgets ${OpenCV_LIBS})