Qt Creator 错误:找不到 -lopencv_imgcodecs [英] Qt Creator Error: cannot find -lopencv_imgcodecs

问题描述

我已经通过 Windows 上的 VMware 在 ubuntu 15.10 上安装了 opencv、qt、qt creator、cmake.

I have installed opencv, qt, qt creator, cmake on ubuntu 15.10 through VMware on windows.

opencv安装在这个目录:/主页/majidalaeinia/opencv/

项目仓库被克隆到这个目录:/home/majidalaeinia/桌面/imgwarp-opencv/

我想通过它的 项目github.com/cxcxcxcx/imgwarp-opencv/blob/master/src/CMakeLists.txt" rel="nofollow noreferrer">CMakeLists.txt 在 qt Creator 中，当我按下 立即构建在 qt creator 上，我收到以下错误:

I want to run the project through its CMakeLists.txt in qt creator and when I press Build now on qt creator, I get the following errors:

error: cannot find -lopencv_imgcodecs
error: collect2: error: ld returned 1 exit status

问题出在哪里，我该如何解决?

Where is the problem and how can I solve it?

推荐答案

@ Majid Alaeinia，我上传了存储库并浏览了代码.如果你进入 demo 文件夹并用我在下面提供的文件更改当前的 CMakeLists.txt 文件，它应该编译(它确实在我提供的更改下编译):

@ Majid Alaeinia,I uploaded the repository and went through the code. if you go inside the demo folder and you change the present CMakeLists.txt file with the one I provided below it should compile (It does compile on mine with the provided changes):

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)

存储库中的代码是旧代码，仍然带有 Qt4 作为主要包装器.我认为您的计算机上可能安装了 Qt5，实际上我提供的代码适用于 Qt5.将其用作 src 文件夹中存在的其他 CMakeLists.txt 文件的指南，并进行相应更改.

The code in the repository is an old code and still carries Qt4 as main wrappers. I think you probably have Qt5 installed on your computer and in fact the code I provided it will work for Qt5. Use it as a guideline for the other CMakeLists.txt file present inside src folder and change accordingly.

CMake 会编译，但因为它使用了 Qt4 你需要找出最重要的模块来添加，例如包含 QtGui/的新标准QApplication 通常被替换为 QtWidgets/QApplication

CMake will compile but because it was used Qt4 you need to figure out the most important modules to add, for example the new standard for including QtGui/QApplication is usually substituted by QtWidgets/QApplication

我还想留下我之前的答案，以防您需要一个起点或初始模板.我希望这能澄清一点，并能让您继续推进您的项目.

I also wanted to leave my previous answer in case you need a starting point or a initial template. I hope this clarifies a bit more and can get you move forward for your project.

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