Linker error while adding Firebase SDK to QT project.

jsulm

Are the Firebase libs for arm64-v8a?
How exactly did you add them (your pri or CMakeLists.txt file).

Vidya485

I added it in .pri file

jsulm

@Vidya485 I can't see the content of the pri file.
Please post it as text.

And please also answer my first question.

Vidya485

I have downloaded firebase sdk from and it shows arm64-v8a under libs=>android

Vidya485

I have included firebase libraries in android.pri

JonB

@Vidya485 Do you think it is a good idea to add the same libraries from multiple architectures?

Vidya485

@JonB, I am not sure about it, I am new to qt framework. I might be wrong but in qt5.15 I can see multi abi kit so I thought I might need to libraries from multiple architectures.

jsulm

@Vidya485 Remove all other architectures except the one you're trying right now - does it work?
How and where is ANDROID_EXTRA_LIBS used?
You can also check the build logs to see whether the libs are actualy linked.

And again: why do you post text as pictures?

SGaist

Hi,

ANDROID_EXTRA_LIBS is for deploying additional libraries to the target. It has nothing to do with linking. Use the LIBS variable to setup proper linking.

Vidya485

Thank you all for your quick response and help. All linker errors are gone now and I could build apk. But my app is crashing when I open it.

Does qt5.15 supports latest firebase sdk i..e firebase_cpp_sdk_12.0.0 ?

jsulm

Did you debug your app to see where and why it is crashing?

Vidya485

I tired app on two different android version

on Android 14 error was

AndroidRuntime: FATAL EXCEPTION: main
06-19 09:39:59.417 24868 24868 E AndroidRuntime: Process: org.eshma.eshmagcs, PID: 24868
06-19 09:39:59.417 24868 24868 E AndroidRuntime: java.lang.RuntimeException: Unable to start activity ComponentInfo{org.eshma.eshmagcs/org.eshma.eshmagcs.QGCActivity}: java.lang.IllegalArgumentException: org.eshma.eshmagcs: Targeting S+ (version 31 and above) requires that one of FLAG_IMMUTABLE or FLAG_MUTABLE be specified when creating a PendingIntent.
06-19 09:39:59.417 24868 24868 E AndroidRuntime: Strongly consider using FLAG_IMMUTABLE, only use FLAG_MUTABLE if some functionality depends on the PendingIntent being mutable, e.g. if it needs to be used with inline replies or bubbles.

On Android 8 error was

ActivityManager: START u0 {act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] flg=0x10000000 pkg=org.eshma.eshmagcs cmp=org.eshma.eshmagcs/.QGCActivity} from uid 10020
06-19 21:28:39.946 1345 2512 I ActivityManager: Start proc 7951:org.eshma.eshmagcs/u0a90 for activity org.eshma.eshmagcs/.QGCActivity
--------- beginning of crash
06-19 21:28:40.184 7951 7951 E AndroidRuntime: FATAL EXCEPTION: main
06-19 21:28:40.184 7951 7951 E AndroidRuntime: Process: org.eshma.eshmagcs, PID: 7951
06-19 21:28:40.184 7951 7951 E AndroidRuntime: java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{org.eshma.eshmagcs/org.eshma.eshmagcs.QGCActivity}: java.lang.ClassNotFoundException: Didn't find class "org.eshma.eshmagcs.QGCActivity" on path: DexPathList[[zip file "/data/app/org.eshma.eshmagcs-P35fhwEYV0p61_KgFP-IRQ==/base.apk"],nativeLibraryDirectories=[/data/app/org.eshma.eshmagcs-P35fhwEYV0p61_KgFP-IRQ==/lib/arm64, /data/app/org.eshma.eshmagcs-P35fhwEYV0p61_KgFP-IRQ==/base.apk!/lib/arm64-v8a, /system/lib64, /vendor/lib64]]
06-19 21:28:40.184 7951 7951 E AndroidRuntime: at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2682)
06-19 21:28:40.184 7951 7951 E AndroidRuntime: at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2859)
06-19 21:28:40.184 7951 7951 E AndroidRuntime: at android.app.ActivityThread.-wrap11(Unknown Source:0)
06-19 21:28:40.184 7951 7951 E AndroidRuntime: at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1592)
06-19 21:28:40.184 7951 7951 E AndroidRuntime: at android.os.Handler.dispatchMessage(Handler.java:106)
06-19 21:28:40.184 7951 7951 E AndroidRuntime: at android.os.Looper.loop(Looper.java:164)
06-19 21:28:40.184 7951 7951 E AndroidRuntime: at android.app.ActivityThread.main(ActivityThread.java:6518)
06-19 21:28:40.184 7951 7951 E AndroidRuntime: at java.lang.reflect.Method.invoke(Native Method)
06-19 21:28:40.184 7951 7951 E AndroidRuntime: at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438)

jsulm

This looks like the crashes are not related to the Firebase. Check whether your app also crashes if you remove Firebase libs completely.

Vidya485

App was working fine till I add firebase libs and made changes related to firebase like adding build.gradle and all.

Christian Ehrlicher

Why not using the Qt InterBase sql plugin instead trying to directly link to the firebird libs?

Vidya485

I am new to Qt framework itself, what I am trying to achieve is

I have have customized QGroundcontrol GCS https://github.com/mavlink/qgroundcontrol
I want to add firebase support with- Google login
Want to get drone live location on fleet management app ( which is using firebase) for which GCSs will be sending data to firebase.

I am not sure if Qt InterBase sql plugin will be able to achieve this.

Any guidance and help would be greatly appreciated.