mingw编译opencv
我这里是msys2
这个是msys2的教程
https://blog.csdn.net/qq_39942341/article/details/105931335?ops_request_misc=%257B%2522request%255Fid%2522%253A%2522167821146216800197067008%2522%252C%2522scm%2522%253A%252220140713.130102334.pc%255Fblog.%2522%257D&request_id=167821146216800197067008&biz_id=0&utm_medium=distribute.pc_search_result.none-task-blog-2blogfirst_rank_ecpm_v1~rank_v31_ecpm-1-105931335-null-null.blog_rank_default&utm_term=msys2&spm=1018.2226.3001.4450
msys2
这里用msys2直接装
配置一下msys2的环境变量（教程里有）
装qt6，将C:\Qt\6.4.2\mingw_64\bin加入环境变量（不知道msvc的能不能用）
（qt6这个可以极端一点，直接想办法下载dll，但是我懒得尝试）
pacman -Syu
pacman -S mingw-w64-x86_64-opencv
接着测试
main.cpp
#include CMakeLists.txt
cmake_minimum_required(VERSION 3.0.0)
project(OpenCV_test VERSION 0.1.0)
IF(NOT CMAKE_BUILD_TYPE)
SET(CMAKE_BUILD_TYPE Release)
ENDIF()
add_executable(${PROJECT_NAME} main.cpp)
# Where to find CMake modules and OpenCV
#set(OpenCV_DIR "D:\\opencv-4.5.5\\opencv-4.5.5\\build")
find_package(OpenCV REQUIRED)
message(STATUS "OpenCV Include: ${OpenCV_INCLUDE_DIRS}")
message(STATUS "OpenCV Libs: ${OpenCV_LIBRARIES}")
INCLUDE_DIRECTORIES(${OpenCV_INCLUDE_DIRS})
target_link_libraries(${PROJECT_NAME} ${OpenCV_LIBS})
打开cmd/powershell
mkdir build
cd build
cmake -G "MinGW Makefiles" ..
mingw32-make
.\OpenCV_test.exe
懒人版
https://gitee.com/kirigaya/opencv_built_by_gcc_on_-windows
https://github.com/huihut/OpenCV-MinGW-Build
下了之后，需要设置环境变量D:\opencv-4.5.5\opencv-4.5.5\build\x64\mingw\bin
（就是\x64\mingw\bin）
接着测试
除了cmake，剩下的和上面一样
CMakeLists.txt
与上一个的区别就是set(OpenCV_DIR)这一行
cmake_minimum_required(VERSION 3.0.0)
project(OpenCV_test VERSION 0.1.0)
IF(NOT CMAKE_BUILD_TYPE)
SET(CMAKE_BUILD_TYPE Release)
ENDIF()
add_executable(${PROJECT_NAME} main.cpp)
# Where to find CMake modules and OpenCV
set(OpenCV_DIR "D:\\opencv-4.5.5\\opencv-4.5.5\\build")
find_package(OpenCV REQUIRED)
message(STATUS "OpenCV Include: ${OpenCV_INCLUDE_DIRS}")
message(STATUS "OpenCV Libs: ${OpenCV_LIBRARIES}")
INCLUDE_DIRECTORIES(${OpenCV_INCLUDE_DIRS})
target_link_libraries(${PROJECT_NAME} ${OpenCV_LIBS})
源码
我这里mingw是用msys2装的
配置一下msys2的环境变量（教程里有）
装qt6，将C:\Qt\6.4.2\mingw_64\bin加入环境变量（不知道msvc的能不能用）
cmake加入环境变量（要比msys高
4.5.4
这里我WITH_QT=OFF,因为我检测不出来5，只能检测6，但是4.5.4好像搞不了qt6
mkdir build
mkdir mingw_build
cd mingw_build
cmake -G "MinGW Makefiles" .. -DCMAKE_INSTALL_PREFIX="../build" -DBUILD_TESTS=OFF -DBUILD_PERF_TESTS=OFF -DBUILD_opencv_python_tests=OFF -DOPENCV_DOWNLOAD_MIRROR_ID=gitcode -DBUILD_TIFF=ON -DOPENCV_GENERATE_PKGCONFIG=ON -DBUILD_opencv_python2=OFF -DBUILD_opencv_python3=OFF -DWITH_CUDA=OFF -DWITH_VTK=OFF -DWITH_MATLAB=OFF -DCMAKE_CXX_COMPILER=g++ -DWITH_QT=OFF -DENABLE_PRECOMPILED_HEADERS=OFF -DWITH_MSMF=OFF -DWITH_IPP=OFF -DWITH_OPENGL=ON -DBUILD_JAVA=OFF -DOPENCV_ENABLE_ALLOCATOR_STATS=OFF -DWITH_MSMF=OFF -DWITH_ZLIB=ON -DBUILD_ZLIB=ON
检查一下他的输出，没问题就可以编译了
其中12是线程数量，你核多，可以多开一点
mingw32-make clean
mingw32-make -j 12
没有问题就可以安装
mingw32-make install
设置环境变量D:\opencv-4.5.4\opencv-4.5.4\build\x64\mingw\bin
接着是测试，和懒人版差不多
4.5.5
暂时没成功
我这里mingw是用msys2装的
去官网下sources
https://opencv.org/releases/
选择sources
我这里选的4.5.5
在这个目录打开cmd/powershell
mkdir build
mkdir mingw_build
cd mingw_build
cmake -G "MinGW Makefiles" .. -DCMAKE_INSTALL_PREFIX="../build" -DBUILD_TESTS=OFF -DBUILD_PERF_TESTS=OFF -DBUILD_opencv_python_tests=OFF -DOPENCV_DOWNLOAD_MIRROR_ID=gitcode -DBUILD_TIFF=ON -DOPENCV_GENERATE_PKGCONFIG=ON -DBUILD_opencv_python2=OFF -DBUILD_opencv_python3=OFF -DWITH_CUDA=OFF -DWITH_VTK=OFF -DWITH_MATLAB=OFF -DCMAKE_CXX_COMPILER=g++ -DWITH_QT=ON -DENABLE_PRECOMPILED_HEADERS=OFF -DWITH_MSMF=OFF -DWITH_IPP=OFF -DWITH_OPENGL=ON -DBUILD_JAVA=OFF -DOPENCV_ENABLE_ALLOCATOR_STATS=OFF -DWITH_MSMF=OFF -DWITH_ZLIB=ON -DBUILD_ZLIB=ON
接着
cmake-gui
不要tests
不要java
要opengl
不要ENABLE_PRECOMPILED_HEADERS
不要WITH_MSMF
不要WITH_IPP
不要OPENCV_ENABLE_ALLOCATOR_STATS
不要java
要qt
点configure直到没有红的
然后点generate
General configuration for OpenCV 4.5.5 =====================================
Version control: unknown
Platform:
Timestamp: 2023-03-08T03:26:07Z
Host: Windows 10.0.19045 AMD64
CMake: 3.26.0-rc1
CMake generator: MinGW Makefiles
CMake build tool: C:/msys64/mingw64/bin/mingw32-make.exe
Configuration: Release
CPU/HW features:
Baseline: SSE SSE2 SSE3
requested: SSE3
Dispatched code generation: SSE4_1 SSE4_2 FP16 AVX AVX2 AVX512_SKX
requested: SSE4_1 SSE4_2 AVX FP16 AVX2 AVX512_SKX
SSE4_1 (16 files): + SSSE3 SSE4_1
SSE4_2 (1 files): + SSSE3 SSE4_1 POPCNT SSE4_2
FP16 (0 files): + SSSE3 SSE4_1 POPCNT SSE4_2 FP16 AVX
AVX (4 files): + SSSE3 SSE4_1 POPCNT SSE4_2 AVX
AVX2 (31 files): + SSSE3 SSE4_1 POPCNT SSE4_2 FP16 FMA3 AVX AVX2
AVX512_SKX (5 files): + SSSE3 SSE4_1 POPCNT SSE4_2 FP16 FMA3 AVX AVX2 AVX_512F AVX512_COMMON AVX512_SKX
C/C++:
Built as dynamic libs?: YES
C++ standard: 11
C++ Compiler: C:/msys64/mingw64/bin/g++.exe (ver 12.2.0)
C++ flags (Release): -fsigned-char -W -Wall -Werror=return-type -Werror=non-virtual-dtor -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wundef -Winit-self -Wpointer-arith -Wshadow -Wsign-promo -Wuninitialized -Wsuggest-override -Wno-delete-non-virtual-dtor -Wno-comment -Wimplicit-fallthrough=3 -Wno-strict-overflow -fdiagnostics-show-option -Wno-long-long -fomit-frame-pointer -ffunction-sections -fdata-sections -msse -msse2 -msse3 -fvisibility=hidden -fvisibility-inlines-hidden -O3 -DNDEBUG -DNDEBUG
C++ flags (Debug): -fsigned-char -W -Wall -Werror=return-type -Werror=non-virtual-dtor -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wundef -Winit-self -Wpointer-arith -Wshadow -Wsign-promo -Wuninitialized -Wsuggest-override -Wno-delete-non-virtual-dtor -Wno-comment -Wimplicit-fallthrough=3 -Wno-strict-overflow -fdiagnostics-show-option -Wno-long-long -fomit-frame-pointer -ffunction-sections -fdata-sections -msse -msse2 -msse3 -fvisibility=hidden -fvisibility-inlines-hidden -g -O0 -DDEBUG -D_DEBUG
C Compiler: C:/msys64/mingw64/bin/cc.exe
C flags (Release): -fsigned-char -W -Wall -Werror=return-type -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wundef -Winit-self -Wpointer-arith -Wshadow -Wuninitialized -Wno-comment -Wimplicit-fallthrough=3 -Wno-strict-overflow -fdiagnostics-show-option -Wno-long-long -fomit-frame-pointer -ffunction-sections -fdata-sections -msse -msse2 -msse3 -fvisibility=hidden -O3 -DNDEBUG -DNDEBUG
C flags (Debug): -fsigned-char -W -Wall -Werror=return-type -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wundef -Winit-self -Wpointer-arith -Wshadow -Wuninitialized -Wno-comment -Wimplicit-fallthrough=3 -Wno-strict-overflow -fdiagnostics-show-option -Wno-long-long -fomit-frame-pointer -ffunction-sections -fdata-sections -msse -msse2 -msse3 -fvisibility=hidden -g -O0 -DDEBUG -D_DEBUG
Linker flags (Release): -Wl,--gc-sections
Linker flags (Debug): -Wl,--gc-sections
ccache: NO
Precompiled headers: NO
Extra dependencies:
3rdparty dependencies:
OpenCV modules:
To be built: calib3d core dnn features2d flann gapi highgui imgcodecs imgproc ml objdetect photo stitching video videoio
Disabled: java_bindings_generator python_bindings_generator python_tests world
Disabled by dependency: -
Unavailable: java python2 python3 ts
Applications: apps
Documentation: NO
Non-free algorithms: NO
Windows RT support: NO
GUI: QT6
QT: YES (ver 6.4.2 )
QT OpenGL support: YES (Qt6::OpenGL )
Win32 UI: YES
OpenGL support: YES (opengl32 glu32)
Media I/O:
ZLib: zlib (ver 1.2.11)
JPEG: build-libjpeg-turbo (ver 2.1.2-62)
WEBP: build (ver encoder: 0x020f)
PNG: build (ver 1.6.37)
TIFF: build (ver 42 - 4.2.0)
JPEG 2000: build (ver 2.4.0)
OpenEXR: OpenEXR::OpenEXR (ver 3.1.5)
HDR: YES
SUNRASTER: YES
PXM: YES
PFM: YES
Video I/O:
DC1394: NO
FFMPEG: YES (prebuilt binaries)
avcodec: YES (58.134.100)
avformat: YES (58.76.100)
avutil: YES (56.70.100)
swscale: YES (5.9.100)
avresample: YES (4.0.0)
GStreamer: YES (1.22.1)
DirectShow: YES
Parallel framework: none
Trace: YES (built-in)
Other third-party libraries:
Lapack: NO
Eigen: YES (ver 3.4.0)
Custom HAL: NO
Protobuf: build (3.19.1)
OpenCL: YES (no extra features)
Include path: D:/opencv-4.5.5/opencv-4.5.5/3rdparty/include/opencl/1.2
Link libraries: Dynamic load
Python (for build): NO
Install to: D:/opencv-4.5.5/opencv-4.5.5/build
-----------------------------------------------------------------
mingw32-make clean
mingw32-make -j 12
然后我就死在这了
mingw32-make[2]: *** No rule to make target 'zlib', needed by 'bin/libopencv_imgcodecs455.dll'. Stop.
mingw32-make[1]: *** [CMakeFiles\Makefile2:1823: modules/imgcodecs/CMakeFiles/opencv_imgcodecs.dir/all] Error 2
mingw32-make: *** [Makefile:165: all] Error 2
https://zhuanlan.zhihu.com/p/606873516
https://zhuanlan.zhihu.com/p/488401407