Error when rebuilding - fatal error: 'opencv2/core.hpp' file not found

[fakob]

Today I was upgrading from opencv4nodejs 4.9.1 to 5.3.0 when I ran into this error.

I am using opencv4nodejs in an electron environment and there the below listed error message is triggered when using electron-rebuild, which I guess is similar to this command as it produces more or less the same error.

node-gyp rebuild --jobs max

The building of both opencv4nodejs and opencv-build seems to work fine. The build output has lots of warnings, but ends successfully (see attached file). After that the error is thrown when rebuilding gets triggered.

I have looked at these issues but their solutions do not work for me https://github.com/justadudewhohacks/opencv4nodejs/issues/591 - I do not have tesseract installed https://github.com/justadudewhohacks/opencv4nodejs/issues/618 - disabling autobuild is currently not an option for me

Anyone an idea? In the build files I saw that opencv 3.4.6 gets installed by default. Might it make a difference if one builds opencv 4.x with autoBuildOpencvVersion?

Error Message

An unhandled error occurred inside electron-rebuild
gyp info it worked if it ends with ok
gyp info using [email protected]
gyp info using [email protected] | darwin | x64
gyp info find Python using Python version 2.7.16 found at "/usr/local/opt/python@2/bin/python2.7"
gyp info spawn /usr/local/opt/python@2/bin/python2.7
gyp info spawn args [
gyp info spawn args   '/Users/fakob/_jakob/work/fakob_MoviePrintApp_130515/03_Programming/02_Setups/05_Electron/MoviePrint_v004/node_modules/electron-rebuild/node_modules/node-gyp/gyp/gyp_main.py',
gyp info spawn args   'binding.gyp',
gyp info spawn args   '-f',
gyp info spawn args   'make',
gyp info spawn args   '-I',
gyp info spawn args   '/Users/fakob/_jakob/work/fakob_MoviePrintApp_130515/03_Programming/02_Setups/05_Electron/MoviePrint_v004/app/node_modules/opencv4nodejs/build/config.gypi',
gyp info spawn args   '-I',
gyp info spawn args   '/Users/fakob/_jakob/work/fakob_MoviePrintApp_130515/03_Programming/02_Setups/05_Electron/MoviePrint_v004/node_modules/electron-rebuild/node_modules/node-gyp/addon.gypi',
gyp info spawn args   '-I',
gyp info spawn args   '/Users/fakob/.electron-gyp/4.2.10/include/node/common.gypi',
gyp info spawn args   '-Dlibrary=shared_library',
gyp info spawn args   '-Dvisibility=default',
gyp info spawn args   '-Dnode_root_dir=/Users/fakob/.electron-gyp/4.2.10',
gyp info spawn args   '-Dnode_gyp_dir=/Users/fakob/_jakob/work/fakob_MoviePrintApp_130515/03_Programming/02_Setups/05_Electron/MoviePrint_v004/node_modules/electron-rebuild/node_modules/node-gyp',
gyp info spawn args   '-Dnode_lib_file=/Users/fakob/.electron-gyp/4.2.10/<(target_arch)/node.lib',
gyp info spawn args   '-Dmodule_root_dir=/Users/fakob/_jakob/work/fakob_MoviePrintApp_130515/03_Programming/02_Setups/05_Electron/MoviePrint_v004/app/node_modules/opencv4nodejs',
gyp info spawn args   '-Dnode_engine=v8',
gyp info spawn args   '--depth=.',
gyp info spawn args   '--no-parallel',
gyp info spawn args   '--generator-output',
gyp info spawn args   'build',
gyp info spawn args   '-Goutput_dir=.'
gyp info spawn args ]
gyp info spawn make
gyp info spawn args [ 'BUILDTYPE=Release', '-C', 'build' ]
  CXX(target) Release/obj.target/opencv4nodejs/cc/opencv4nodejs.o
In file included from ../cc/opencv4nodejs.cc:2:
In file included from ../cc/ExternalMemTracking.h:1:
../cc/macros.h:2:10: fatal error: 'opencv2/core.hpp' file not found
#include <opencv2/core.hpp>
         ^~~~~~~~~~~~~~~~~~
1 error generated.
make: *** [Release/obj.target/opencv4nodejs/cc/opencv4nodejs.o] Error 1
gyp ERR! build error 
gyp ERR! stack Error: `make` failed with exit code: 2
gyp ERR! stack     at ChildProcess.onExit (/Users/fakob/_jakob/work/fakob_MoviePrintApp_130515/03_Programming/02_Setups/05_Electron/MoviePrint_v004/node_modules/electron-rebuild/node_modules/node-gyp/lib/build.js:194:23)
gyp ERR! stack     at ChildProcess.emit (events.js:200:13)
gyp ERR! stack     at Process.ChildProcess._handle.onexit (internal/child_process.js:272:12)
gyp ERR! System Darwin 18.7.0
gyp ERR! command "/usr/local/Cellar/node/12.4.0/bin/node" "/Users/fakob/_jakob/work/fakob_MoviePrintApp_130515/03_Programming/02_Setups/05_Electron/MoviePrint_v004/node_modules/electron-rebuild/node_modules/.bin/node-gyp" "rebuild" "--target=4.2.10" "--arch=x64" "--dist-url=https://electronjs.org/headers" "--build-from-source"
gyp ERR! cwd /Users/fakob/_jakob/work/fakob_MoviePrintApp_130515/03_Programming/02_Setups/05_Electron/MoviePrint_v004/app/node_modules/opencv4nodejs
gyp ERR! node -v v12.4.0
gyp ERR! node-gyp -v v5.0.5
gyp ERR! not ok 

Failed with exit code: 1

Auto Build - ~~Full Error Log~~

auto build seems to be successfull yarn --verbose build output.txt

[ztaylor54]

I am having this identical issue on Mac OS 10.15.1. Autobuild runs fine, but Electron rebuild fails with same error.

[tdzl2003-deploy]

Got same error on windows. I checked sln file, it seems including dir was not added when running electron-build.

[P0oOOOo0YA]

The same problem here. Seems that electron-rebuild can't include opencv2/core.hpp and i can't find opencv2/core.hpp myself. Is there any solution to this problem?

[AMoreaux]

With Ubuntu 18.04 OpenCV 4.1.0. I make a link to solve this problem. ln -s /usr/local/include/opencv4/opencv2/ /usr/local/include/opencv2

[Vaspra]

@justadudewhohacks would adding C:\tools\opencv\build\include to build/opencv4nodejs.vcxproj in properties -> Configurations Properties -> C/C++ -> General -> Additional Include Directories help? I have seen others using this solution, but when I go to electron-build the sln is obviously overwritten without this modification. (Windows 10, project not in a white-spaced directory) Cheers!

[Vaspra]

Edit: My last suggestion was using the install from opencv's site, not chocolatey. I actually don't think that was the cause, instead I had to use [email protected]. Note that this will not work if you just change your package.json entry to ^5.1.0, as this will simply install 5.5.0 again.

As to why windows freaks out with 5.5.0, I couldn't tell you, but I hope this helps someone.

[benmarten]

ln -s /usr/local/include/opencv4/opencv2/ /usr/local/include/opencv2

Thanks, this approach solved the issue for me on macOS Catalina and openCV installed via homebrew: ln -s /usr/local/Cellar/opencv/4.2.0_1/include/opencv4/opencv2 /usr/local/Cellar/opencv/4.2.0_1/include/opencv2

[darknblack]

With Ubuntu 18.04 OpenCV 4.1.0. I make a link to solve this problem. ln -s /usr/local/include/opencv4/opencv2/ /usr/local/include/opencv2

Having this issue when creating a symlink

dlopen(/Users/ianoderon/Desktop/dev/cam/node_modules/opencv4nodejs/build/Release/opencv4nodejs.node, 1): Symbol not found: __ZNK2cv12MatAllocator23getBufferPoolControllerEPKc
  Referenced from: /Users/ianoderon/Desktop/dev/cam/node_modules/opencv4nodejs/build/Release/opencv4nodejs.node
  Expected in: flat namespace
 in /Users/ianoderon/Desktop/dev/cam/node_modules/opencv4nodejs/build/Release/opencv4nodejs.node

I'm using mac osx 10.14.6

[tears743]

With Ubuntu 18.04 OpenCV 4.1.0. I make a link to solve this problem. ln -s /usr/local/include/opencv4/opencv2/ /usr/local/include/opencv2

Having this issue when creating a symlink

dlopen(/Users/ianoderon/Desktop/dev/cam/node_modules/opencv4nodejs/build/Release/opencv4nodejs.node, 1): Symbol not found: __ZNK2cv12MatAllocator23getBufferPoolControllerEPKc
  Referenced from: /Users/ianoderon/Desktop/dev/cam/node_modules/opencv4nodejs/build/Release/opencv4nodejs.node
  Expected in: flat namespace
 in /Users/ianoderon/Desktop/dev/cam/node_modules/opencv4nodejs/build/Release/opencv4nodejs.node

I'm using mac osx 10.14.6

Have you solved that problem ?

[fakob]

I have done some more testing on mac and windows, but, spoiler alert, I am stuck with the same issues as everyone else. But for what its worth here are my findings:

• The issue started with 5.3.0. The version before (5.2.0) worked fine for me
• Regarding the opencv2/core.hpp file not found error, it seems that the defaultIncludeDirs are defined correctly, but somehow might not be triggered? - see install.js
• Regarding the Symbol not found error, I am not exactly sure, but believe it has something todo with the libraries not being set/linked correctly. Maybe @justadudewhohacks has some ideas to point me into the right direction?

Details

My setup

• I have set up my own simple electron opencv4nodejs test repository built on electron-react-boilerplate as I had some issues with opencv-electron
• I am using the autoBuild feature
• I have tested on mac and windows, both with opencv 3 and 4

My tests To get around the

In file included from ../cc/opencv4nodejs.cc:2:
In file included from ../cc/ExternalMemTracking.h:1:
../cc/macros.h:2:10: fatal error: 'opencv2/core.hpp' file not found
#include <opencv2/core.hpp>
         ^~~~~~~~~~~~~~~~~~

error I had added the include directory path in theapp/node_modules/opencv4nodejs/binding.gyp

"include_dirs" : [
	"<!@(node ./install/parseEnv.js OPENCV4NODEJS_INCLUDES)",
	"cc",
	"cc/core",
	"<!(node -e \"require('nan')\")",
	"<!(node -e \"require('native-node-utils')\")",
	"<(module_root_dir)/../opencv-build/opencv/build/include",
],

I have used the autoBuildOpencvVersion to test if opencv4 makes any difference, but it did not. For opencv 4 the include path is slightly different

	"<(module_root_dir)/../opencv-build/opencv/build/include/opencv4",

After having fixed the include issue electron-rebuild ends successfully. But when running the application, the Symbol not found error pops up.

Uncaught Error: dlopen(/Users/jakobschindegger/Documents/Electron/electron-opencv4nodejs/app/node_modules/opencv4nodejs/build/Release/opencv4nodejs.node, 1): Symbol not found: __ZNK2cv12MatAllocator23getBufferPoolControllerEPKc
  Referenced from: /Users/jakobschindegger/Documents/Electron/electron-opencv4nodejs/app/node_modules/opencv4nodejs/build/Release/opencv4nodejs.node
  Expected in: flat namespace
 in /Users/jakobschindegger/Documents/Electron/electron-opencv4nodejs/app/node_modules/opencv4nodejs/build/Release/opencv4nodejs.node

This is where I am stuck now. I am not sure how to solve this error. I had looked at this issue where it seemed that they solved the error, but their solution did not work for me. Maybe because they were not using the autoBuild feature?

[cyrildiagne]

Facing the same issue as @fakob Is there any known workaround? (reverting to 5.2.0 fixes the include + linking issues)

[fakob]

Hi @cyrildiagne, unfortunately I do not know any other than reverting to 5.2.0. The other day I gave it another shot disabling the autoBuild feature, but I ran into the same issue again. Sorry.

[julianakuei]

With Ubuntu 18.04 OpenCV 4.1.0. I make a link to solve this problem. ln -s /usr/local/include/opencv4/opencv2/ /usr/local/include/opencv2

Really helpful! Thanks~

[luisantos1986]

ln -s /usr/local/include/opencv4/opencv2/ /usr/local/include/opencv2

Thanks, this approach solved the issue for me on macOS Catalina and openCV installed via homebrew: ln -s /usr/local/Cellar/opencv/4.2.0_1/include/opencv4/opencv2 /usr/local/Cellar/opencv/4.2.0_1/include/opencv2

I tried to do this approach on macOS Catalina 10.15.6 and it didn't work

[AramAnd]

I am getting the same issue in electron on Windows, check below, with the following setup "dependencies": { "electron": "10.1.4", "electron-rebuild": "2.3.2", "opencv4nodejs": "5.6.0" }, "opencv4nodejs": { "disableAutoBuild": 1, "opencvIncludeDir": "C:\\tools\\opencv\\build\\include", "opencvLibDir": "C:\\tools\\opencv\\build\\x64\\vc14\\lib", "opencvBinDir": "C:\\tools\\opencv\\build\\x64\\vc14\\bin" } fatal error: 'opencv2/core.hpp' file not found

[zcmgyu]

@fakob Hi, I got the same issue as yours. Did you figure out the workaround? :bow:

Error: dlopen(/Users/zcmgyu/Documents/LongWorkingSpace/matt/opencv4nodejs/build/Release/opencv4nodejs.node, 0x0001): symbol not found in flat namespace '__ZNK2cv12MatAllocator23getBufferPoolControllerEPKc'

[fakob]

No sorry @zcmgyu, still the same as before. https://github.com/justadudewhohacks/opencv4nodejs/issues/645#issuecomment-671104335

[zcmgyu]

Thanks 🙇 I gave it up. I'm trying using OpenCV.js instead.

https://docs.opencv.org/4.5.4/dc/de6/tutorial_js_nodejs.html

[rajvigohil2411]

Facing the same issue on MacOS Monterey, while running npm i opencv4nodejs and none of the above mentioned steps worked. Installed opencv using brew after setting export OPENCV4NODEJS_DISABLE_AUTOBUILD=1 as mentioned here

[UrielCh]

maybe you should try @u4/opencv4nodejs this original opencv4nodejs is not maintained anymore.