Question

我正在使用CMake构建一个c ++项目，该项目取决于使用Vcpkg安装的OpenCV库。

这是我的CMakeList.txt文件：

# CMakeList.txt : CMake project for CMakeProject2, include source and define
# project specific logic here.
#
cmake_minimum_required (VERSION 3.8)
set( CMAKE_TOOLCHAIN_FILE "C:/vcpkg/scripts/buildsystems/vcpkg.cmake" )


# Find Package
find_package( OpenCV REQUIRED )

# Additional Include Directories
include_directories( ${OpenCV_INCLUDE_DIRS} )

message("hello world " ${OpenCV_LIB_DIR} ${OpenCV_LIBS})

# Additional Library Directories
link_directories( ${OpenCV_LIB_DIR} )
link_libraries(${OpenCV_LIBS})


#set( OpenCV_DIR "C:/vcpkg/installed/x64-windows/share/opencv" )
# Add source to this project's executable.
add_executable (CMakeProject2 "CMakeProject2.cpp" "CMakeProject2.h")

# Additional Dependencies
target_link_libraries( CMakeProject2 ${OpenCV_LIBS} )

CMakeProject2.cpp文件：

#include "CMakeProject2.h"
#include <iostream>
#include "opencv2/opencv.hpp"

using namespace cv;

using namespace std;

int main()
{
    cout << "OpenCV version : " << CV_VERSION << endl;
    cout << "Hello CMake." << endl;
    return 0;
}

我正在使用这些命令来构建这些项目：

cmake ..\CMakeProject2 -G "MinGW Makefiles" -DCMAKE_TOOLCHAIN_FILE=C:\vcpkg\scripts\buildsystems\vcpkg.cmake
make

这就是我得到的：

\CMakeProject2\build>make
[ 50%] Linking CXX executable CMakeProject2.exe
CMakeFiles\CMakeProject2.dir/objects.a(CMakeProject2.cpp.obj):CMakeProject2.cpp:(.text$_ZN2cv6StringD1Ev[_ZN2cv6StringD1Ev]+0x11): undefined reference to `cv::String::deallocate()'
CMakeFiles\CMakeProject2.dir/objects.a(CMakeProject2.cpp.obj):CMakeProject2.cpp:(.text$_ZN2cv6StringaSERKS0_[_ZN2cv6StringaSERKS0_]+0x25): undefined reference to `cv::String::deallocate()'
collect2.exe: error: ld returned 1 exit status
make[2]: *** [CMakeProject2.exe] Erreur 1
make[1]: *** [CMakeFiles/CMakeProject2.dir/all] Erreur 2
make: *** [all] Erreur 2

Answer 1

我必须运行那些命令：

cmake -G "Visual Studio 15 2017 Win64" -DCMAKE_TOOLCHAIN_FILE=C:\vcpkg\scripts\buildsystems\vcpkg.cmake ..

和

cmake --build . --config Release

Answer 2

很快，您将无法使用-G "MinGW Makefiles"。

当前，vcpkg不提供对MinGW的支持。

它是requested，但最终它是not been implemented，vcpkg维护者的总结意见包括对任何希望再次获得MinGW支持的人的建议：

但是，到目前为止，我们尚未对使用mingw进行过多研究。如果你有   一个有效的CMake工具链文件，您可以按照我们的三元组   documentation [1]创建一个triplets/x64-windows-mingw.cmake文件   将使用该工具链来构建库。

[1] https://github.com/Microsoft/vcpkg/blob/master/docs/users/triplets.md

构建一个包含opencv librarie的cmake C ++项目

2 个答案: