windows compilation in external project - not Cmake -

[pierrextardif]

Hi,

I'm trying to compile depthai-core with a non Cmake project on windows. Cmake works like a charm no problems, just need non Cmake project sturcture here if possible, :).

I've added the following to my Visual Studio project:

1) C/C++ Additional include directories:

C:/Users/pierr/Documents/DEV/DEPTHAI_DEV/depthai-core/include
C:/Users/pierr/Documents/DEV/DEPTHAI_DEV/depthai-core/shared/depthai-shared/include
C:/Users/pierr/Documents/DEV/DEPTHAI_DEV/depthai-core/shared/depthai-bootloader-shared/include
C:/Users/pierr/Documents/DEV/DEPTHAI_DEV/depthai-core/shared/depthai-shared/3rdparty
C:/.hunter/_Base/cb0ea1f/4a379ff/9850c45/Install/include

2) Linker Additionnal Dependencies

C:\Users\pierr\Documents\DEV\DEPTHAI_DEV\build_4\install\lib\depthai-opencv.lib
C:\Users\pierr\Documents\DEV\DEPTHAI_DEV\build_4\install\lib\depthai-resources.lib

3) Linker Command Line added options:

/DEPTHAI_TARGET_CORE /JSON_USE_IMPLICIT_CONVERSIONS=1 /__PC__ /XLINK_USE_MX_ID_NAME 

as detailed in the integreation of the readme.

I get the following LNK2001 errors on compilation:

Here is the project, so you can test it yourself? I'm using Visual studio 2019 with 1503d545d4caad91e0c1a8436c7951ff79b400ef master branch.

Thanks for your help.

Best,

P

[themarpe]

Hi @pierrextardif

We've observed a similar issue in some other case as well, wondering if non CMake integration isn't working currently on Windows.

Will take a look at this and get back to you

[themarpe]

@pierrextardif Builds for me but with a couple of changes. Build dynamic/shared library - using cmake build -D BUILD_SHARED_LIBS=ON and setting depthai-core.lib under Linker -> Input -> Additional Dependencies. Also, this applies for a Release build of depthai library. When building, build depthai-opencv target. Will build core along as well.

[pierrextardif]

@themarpe ,

Thanks for your answer. It seems like it's not working for me.

Just to clarify:

Build dynamic/shared library - using cmake build -D BUILD_SHARED_LIBS=ON

I'v added a bool flag in my Cmake GUI :

Then when building, I build the solution for Depthai-open, which already has the depthai-core.lib as a linked lib:

It is building a .dll : [...]Release\depthai-opencv.dll

Then when building my external Visual Studio project, you mean to have:

C:\Users\pierr\Documents\DEV\DEPTHAI_DEV\build_4\install\lib\depthai-opencv.lib
C:\Users\pierr\Documents\DEV\DEPTHAI_DEV\build_4\install\lib\depthai-core.lib
C:\Users\pierr\Documents\DEV\DEPTHAI_DEV\build_4\install\lib\depthai-resources.lib

?

Does it matter which commit I'm on on the master branch?

[themarpe]

Then when building my external Visual Studio project, you mean to have: C:\Users\pierr\Documents\DEV\DEPTHAI_DEV\build_4\install\lib\depthai-opencv.lib C:\Users\pierr\Documents\DEV\DEPTHAI_DEV\build_4\install\lib\depthai-core.lib C:\Users\pierr\Documents\DEV\DEPTHAI_DEV\build_4\install\lib\depthai-resources.lib

Correct. But resources shouldn't be needed anymore. (make sure you do install again).

Also for consistency sake rely only on one. Either install and use the installed files, or use the files from build directory. You seem to be mixing both now. (WRT include, library and runtime dependencies)

I guess we'll have to also provide a VS sln along in prebuilt binaries as a template to get up and running faster

Does it matter which commit I'm on on the master branch?

Latest commit on main should do. Nothing new on develop wrt to this currently.

[pierrextardif]

Hi,

I'm not sure i understand, and I have the same probelm still.

Here is what i have been doing :

Method1 cmake-gui + visual studio

cmake-gui 3.23 Open depthai-core then set correct build folder, flags, etc:

Open project in Visual studio and build the depthai-opencv solution. I get files in C:\Users\pierr\Documents\DEV\DEPTHAI_DEV\build_4\install\lib which i then link in my external project.

Either i link :

C:\Users\pierr\Documents\DEV\DEPTHAI_DEV\build_4\install\lib\depthai-core.lib
C:\Users\pierr\Documents\DEV\DEPTHAI_DEV\build_4\install\lib\depthai-opencv.lib
C:\dev\opencv\opencv\build\x64\vc15\lib\opencv_world455.lib

or just the opencv.lib one it is not working either. - iget the same linker error.

Method2 cmake command

from the x64 Command Promp do cmake -S. -Bbuild -D'BUILD_SHARED_LIBS=ON' then cmake --build build --target install . Then link the created files from depthai-core/build/installed/libs .

What do you mean by :

Either install and use the installed files, or use the files from build directory. You seem to be mixing both now. (WRT include, library and runtime dependencies)

I've used different builds to try to get it to work, so maybe it was confusing, but for one test i get all .lib files from the same folder for the linker.

Best,

[pierrextardif]

@themarpe seems like something quick for you, any tips as to what I should change to get it working?

Best,

[themarpe]

@pierrextardif

Are you building for x64 or Win32? Also make sure you are building in same config (Release vs Debug)

If time permits, I'll prepare a template VS solution for integration.

[pierrextardif]

@themarpe yes Release for x64.

Seems like i still had no luck. any chance you could provide a template please? Or trouble shoot the answer above?

[themarpe]

@pierrextardif depthai-integration.zip

Extract into: depthai-core/msvc/[depthai-integration.sln/...] Build depthai-core and install:

cmake -S depthai-core -B depthai-core/build -D BUILD_SHARED_LIBS=ON
cmake --build depthai-core/build --parallel --target install --config Debug

Copy libusb libraries from: depthai-core/build/install/lib/cmake/depthai/dependencies/bin to: depthai-core\build\install\bin

Make sure the OpenCV is installed under C:/opencv/[build/x64/...] otherwise modify the include, link and PATH (Environment variables, under Debugging) settings

(Note: Release build seems to have some issues at the time, please try out Debug first)

[themarpe]

@pierrextardif there is now also a "test suite" that includes VS project, which could be used as a starting point. https://github.com/luxonis/depthai-core/tree/msvc_template_libusb_dll_fix

We'll be merging that in after we refactor out some hardcoded paths.

Let me know if that works for you. I'll be closing the issue for now.