Info

Repository contains a minimal example of opencv static linking in golang app with gocv.

Gocv Static Build

1. Install Packages

   go mod tidy

2. Install Opencv (https://gocv.io/getting-started/windows/)

   cd C:\Users\{USER}\go\pkg\mod\gocv.io\x\gocv@v0.42.0
   win_build_opencv.cmd static

3. Run build script

   bash build.sh
   

NOTE: I have included most of the basic dependencies needed to build executable. You may need add more deps depending upon you setup.

How to know which deps required...

I will share my method here... I started building executable with static flags. It will throw errors. Try to find out the cpp files names and try to relate with the static files in dir C:\opencv\build\install\x64\mingw\staticlib. If you find a anything similar. Add them to the deps list. Now Run again you may see another errors. Try to repeat the steps. You may also encounter deps order related issues. This can be slight tricky but if you take the help of ChatGPT it might solve your issues. It may not suggest correct things. But you will get an idea of what is missing or what is the problem. Otherwise you can also try to analyze error manually and include the deps in the order needed.

Result

objdump -p .\build\myapp.exe | grep -i '.dll'
vma:            Hint    Time      Forward  DLL       First
        DLL Name: ADVAPI32.dll
        DLL Name: comdlg32.dll
        DLL Name: GDI32.dll
        DLL Name: KERNEL32.dll
        DLL Name: msvcrt.dll
        DLL Name: ole32.dll
        DLL Name: OLEAUT32.dll
        DLL Name: USER32.dll

Now, Only windows deps are dynamically linked. Which is important and required by the opencv. These deps are always part of the windows.