[Bug]: can't import cv2

[Ar57m]

Problem description

Got this this error, I reinstalled termux and it persisted. Do I need to install something or is it a bug?

import cv2
  File "/data/data/com.termux/files/usr/lib/python3.12/site-packages/cv2/__init__.py", line 181, in <module>
    bootstrap()                                                 File "/data/data/com.termux/files/usr/lib/python3.12/site-packages/cv2/__init__.py", line 153, in bootstrap                   native_module = importlib.import_module("cv2")
                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/data/data/com.termux/files/usr/lib/python3.12/importlib/__init__.py", line 90, in import_module                        return _bootstrap._gcd_import(name[level:], package, level)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^                                                             ImportError: dlopen failed: cannot locate symbol "eglDestroySyncKHR" referenced by "/system/lib64/libgui.so"...

What steps will reproduce the bug?

import cv2 on a python script

What is the expected behavior?

import and use opencv

System information

termux-info
Termux Variables:
TERMUX_APK_RELEASE=F_DROID
TERMUX_APP_PACKAGE_MANAGER=apt
TERMUX_APP_PID=30038                                          TERMUX_IS_DEBUGGABLE_BUILD=0
TERMUX_MAIN_PACKAGE_FORMAT=debian
TERMUX_VERSION=0.118.1                                        TERMUX__USER_ID=0                                             Packages CPU architecture:
aarch64
Subscribed repositories:
# sources.list
deb https://packages-cf.termux.dev/apt/termux-main/ stable main
# x11-repo (sources.list.d/x11.list)
deb https://packages-cf.termux.dev/apt/termux-x11/ x11 main
Updatable packages:
All packages up to date
termux-tools version:
1.44.6
Android version:
13
Kernel build information:
Linux localhost 5.4.233-qgki-27101688-abM526BXXS5CXE2 #1 SMP PREEMPT Fri May 17 15:23:51 KST 2024 aarch64 Android
Device manufacturer:                                          samsung
Device model:
SM-M526B
LD Variables:
LD_LIBRARY_PATH=
LD_PRELOAD=/data/data/com.termux/files/usr/lib/libtermux-exec.so

[Biswa96]

ImportError: dlopen failed: cannot locate symbol "eglDestroySyncKHR" referenced by "/system/lib64/libgui.so"

It seems to be the Android OS issue specific to the device. Please try to export the variable first LD_PRELOAD=/system/lib64/libEGL.so

[Ar57m]

ImportError: dlopen failed: cannot locate symbol "eglDestroySyncKHR" referenced by "/system/lib64/libgui.so"

It seems to be the Android OS issue specific to the device. Please try to export the variable first LD_PRELOAD=/system/lib64/libEGL.so

tried that and printed this when importing cv2:

CANNOT LINK EXECUTABLE "/data/data/com.termux/files/usr/bin/python": cannot locate symbol "Xzs_Construct" referenced by "/system/lib64/libunwindstack.so"...

no idea why that happens, idk how to locate this one, I'm probably never going to pkg upgrade again lol

[Ar57m]

here more info

~/changes $ termux-info
Termux Variables:
TERMUX_APK_RELEASE=F_DROID
TERMUX_APP_PACKAGE_MANAGER=apt
TERMUX_APP_PID=31945
TERMUX_IS_DEBUGGABLE_BUILD=0
TERMUX_MAIN_PACKAGE_FORMAT=debian
TERMUX_VERSION=0.118.1
TERMUX__USER_ID=0
Packages CPU architecture:
aarch64
Subscribed repositories:
# sources.list
deb https://mirrors.ravidwivedi.in/termux/termux-main stable main
# x11-repo (sources.list.d/x11.list)
deb https://mirrors.ravidwivedi.in/termux/termux-x11 x11 main
Updatable packages:
All packages up to date
termux-tools version:
1.44.6
Android version:
13
Kernel build information:
Linux localhost 5.4.233-qgki-27101688-abM526BXXS5CXE2 #1 SMP PREEMPT Fri May 17 15:23:51 KST 2024 aarch64 Android
Device manufacturer:
samsung
Device model:
SM-M526B
LD Variables:
LD_LIBRARY_PATH=
LD_PRELOAD=/system/lib64/libEGL.so
~/changes $ printenv
SHELL=/data/data/com.termux/files/usr/bin/bash
COLORTERM=truecolor
HISTCONTROL=ignoreboth
PREFIX=/data/data/com.termux/files/usr
TERMUX_IS_DEBUGGABLE_BUILD=0
TERMUX_MAIN_PACKAGE_FORMAT=debian
PWD=/data/data/com.termux/files/home/changes
TERMUX_VERSION=0.118.1
EXTERNAL_STORAGE=/sdcard
LD_PRELOAD=/system/lib64/libEGL.so
HOME=/data/data/com.termux/files/home
LANG=en_US.UTF-8
TERMUX_APK_RELEASE=F_DROID
DEX2OATBOOTCLASSPATH=/apex/com.android.art/javalib/core-oj.jar:/apex/com.android.art/javalib/core-libart.jar:/apex/com.android.art/javalib/okhttp.jar:/apex/com.android.art/javalib/bouncycastle.jar:/apex/com.android.art/javalib/apache-xml.jar:/system/framework/framework.jar:/system/framework/framework-graphics.jar:/system/framework/ext.jar:/system/framework/telephony-common.jar:/system/framework/voip-common.jar:/system/framework/ims-common.jar:/system/framework/knoxsdk.jar:/system/framework/SmpsManager.jar:/system/framework/uibc_java.jar:/system/framework/esecomm.jar:/system/framework/tcmiface.jar:/system/framework/telephony-ext.jar:/system/framework/QPerformance.jar:/system/framework/UxPerformance.jar:/apex/com.android.i18n/javalib/core-icu4j.jar
TMPDIR=/data/data/com.termux/files/usr/tmp
ANDROID_DATA=/data
TERM=xterm-256color
ANDROID_I18N_ROOT=/apex/com.android.i18n
SHLVL=1
ANDROID_ROOT=/system
BOOTCLASSPATH=/apex/com.android.art/javalib/core-oj.jar:/apex/com.android.art/javalib/core-libart.jar:/apex/com.android.art/javalib/okhttp.jar:/apex/com.android.art/javalib/bouncycastle.jar:/apex/com.android.art/javalib/apache-xml.jar:/system/framework/framework.jar:/system/framework/framework-graphics.jar:/system/framework/ext.jar:/system/framework/telephony-common.jar:/system/framework/voip-common.jar:/system/framework/ims-common.jar:/system/framework/knoxsdk.jar:/system/framework/SmpsManager.jar:/system/framework/uibc_java.jar:/system/framework/esecomm.jar:/system/framework/tcmiface.jar:/system/framework/telephony-ext.jar:/system/framework/QPerformance.jar:/system/framework/UxPerformance.jar:/apex/com.android.i18n/javalib/core-icu4j.jar:/apex/com.android.adservices/javalib/framework-adservices.jar:/apex/com.android.adservices/javalib/framework-sdksandbox.jar:/apex/com.android.appsearch/javalib/framework-appsearch.jar:/apex/com.android.btservices/javalib/framework-bluetooth.jar:/apex/com.android.conscrypt/javalib/conscrypt.jar:/apex/com.android.ipsec/javalib/android.net.ipsec.ike.jar:/apex/com.android.media/javalib/updatable-media.jar:/apex/com.android.mediaprovider/javalib/framework-mediaprovider.jar:/apex/com.android.ondevicepersonalization/javalib/framework-ondevicepersonalization.jar:/apex/com.android.os.statsd/javalib/framework-statsd.jar:/apex/com.android.permission/javalib/framework-permission.jar:/apex/com.android.permission/javalib/framework-permission-s.jar:/apex/com.android.scheduling/javalib/framework-scheduling.jar:/apex/com.android.sdkext/javalib/framework-sdkextensions.jar:/apex/com.android.tethering/javalib/framework-connectivity.jar:/apex/com.android.tethering/javalib/framework-connectivity-t.jar:/apex/com.android.tethering/javalib/framework-tethering.jar:/apex/com.android.uwb/javalib/framework-uwb.jar:/apex/com.android.wifi/javalib/framework-wifi.jar:/apex/com.samsung.android.ipm/javalib/framework-samsung-ipm.jar:/apex/com.samsung.android.shell/javalib/framework-samsung-privilege.jar
ANDROID_TZDATA_ROOT=/apex/com.android.tzdata
TERMUX_APP_PID=31945
PATH=/data/data/com.termux/files/usr/bin
ANDROID_ART_ROOT=/apex/com.android.art
OLDPWD=/data/data/com.termux/files/home
_=/data/data/com.termux/files/usr/bin/printenv

weird that through the command line calling python and importing cv2 works fine

[Ar57m]

forgot to say im running another python script through a subprocess, how can I fix that? was working fine before

[licy183]

I can't reproduce it on my device. It is well-known that on some devices the android linker doesn't resolve symbols correctly. apt install libandroid-stub and try again.

[Ar57m]

I can't reproduce it on my device. It is well-known that on some devices the android linker doesn't resolve symbols correctly. apt install libandroid-stub and try again.

that didn't help unfortunately, here my code which has this problem https://github.com/Ar57m/another_fractal_generator/tree/server
server.py creates a subprocess which runs runner.py which imports tools.py which imports cv2 and uses it on its functions. I got this error after updating everything using pkg, was working fine before 🤔

[Biswa96]

You could try appending lzma in LD_PRELOAD. liblzma.so have the Xzs_Construct symbol.

LD_PRELOAD=/system/lib64/libEGL.so:/system/lib64/liblzma.so

[Ar57m]

You could try appending lzma in LD_PRELOAD. liblzma.so have the Xzs_Construct symbol.

LD_PRELOAD=/system/lib64/libEGL.so:/system/lib64/liblzma.so

error changed to

ImportError: dlopen failed: cannot locate symbol "glEGLImageTargetTexture2DOES" referenced by "/system/lib64/libgui.so"... 

[licy183]

that didn't help unfortunately,

Try not setting LD_PRELOAD (or set it to /data/data/com.termux/files/usr/lib/libtermux-exec.so).

[Ar57m]

I think I may have found the problem, my main script server.py was importing my module tools.py, the same that I'm importing on runner.py(which runs on a subprocess on server.py), after removing it, it magically works fine again, somehow it's conflicting 🤔. Thanks everyone for the help, I think you guys can close the issue.

[Biswa96]

I think, importing python script should not cause that kind of issue. If there is any error in python script it should be a python error.