IOS/Android: Issue in compiling

[Linoy339]

I have used leveldown-nodejs-mobile, as it was supposed to work. but couldn't work.

In Android, it says : Error: dlopen failed: "/data/data/digital.lamp.mindlamp/files/lampBuild/api/node_modules/leveldown/build/Release/leveldown.node" has bad ELF magic: cffaedfe at Object.Module._extensions..node (module.js:653:18)

In IOS, it says: dlopen(/private/var/mobile/Containers/Data/Application/D1BA5C5F-4140-4E74-86E9-DA126EA579D2/Documents/nodejs-project/api/node_modules/leveldown/build/Release/leveldown.node, 1): no suitable image found. Did find: /private/var/mobile/Containers/Data/Application/D1BA5C5F-4140-4E74-86E9-DA126EA579D2/Documents/nodejs-project/api/node_modules/leveldown/build/Release/leveldown.node: mach-o, but wrong architecture /private/var/mobile/Containers/Data/Application/D1BA5C5F-4140-4E74-86E9-DA126EA579D2/Documents/nodejs-project/api/node_modules/leveldown/build/Release/leveldown.node: mach-o, but wrong architecture

Could you help?

[Linoy339]

HI, Do I need to tweak anything in my binary or library to get it work?

[Linoy339]

Can we use in native mobile app?

[buu700]

@staltz I'm seeing the same run-time error when I require this module: Error: dlopen failed: "/data/data/com.cyph.test/files/www/nodejs-project/node_modules/leveldown-nodejs-mobile/build/Release/leveldown.node" has bad ELF magic: cffaedfe

This is reproducible whether I build the APK from macOS on x86 or macOS on ARM, and whether I run it from a physical device (Pixel 5) or an emulated device. I'm running node@16.8.0, cordova@10.0.0, and cordova-android@10.0.1.

Edit: Also reproduced with node@14.17.5.

[therealjmj]

@buu700 I'm having this issue as well. Did you find a solution for Android?

[buu700]

Unfortunately not, we're just sticking with IndexedDB/Dexie in our mobile apps instead for now.

[staltz]

Sorry I couldn't respond to this issue, I don't have the time for all my open source libraries. The best I can advise you right now is to take a look at the Manyverse codebase and see if you can learn something from there, e.g.

• Main build script https://github.com/staltz/manyverse/blob/master/tools/build-backend.js
• Other build scripts https://github.com/staltz/manyverse/tree/master/tools/backend
• Android specific: https://github.com/staltz/manyverse/blob/master/tools/backend/build-native-modules.sh
• On iOS it's important that scripts follow a specific order: https://github.com/staltz/manyverse/blob/master/ios/Manyverse.xcodeproj/project.pbxproj

I'm aware that with Cordova the build setup is significantly different. Manyverse is using React Native.

For Cordova I also worked on another project, Ahau, that used nodejs-mobile and leveldown, perhaps their build scripts can give you some insight:

• Main build script https://gitlab.com/ahau/ahau/-/blob/master/mobile/scripts/build-nodejs-project.sh

[therealjmj]

Appreciate you leaving these detailed comments and examples! We will explore Manyverse to try to get our Android build working. When we figure it out, I hope to leave notes to help future devs who use this repo. (Side note – We're using React Native.)

[therealjmj]

I included a few of the build scripts, notably build-native-modules.sh and move-shared-libs-android.sh, and got it working on device! Still not working on emulator, but that's ok for our purposes. Thanks again @staltz !

Note that I also needed to modify android/settings.gradle and android/app/build.gradle to get it working, and set NODEJS_MOBILE_BUILD_NATIVE_MODULES=1 in android/gradle.properties.

[staltz]

Great to hear! Just as a data point, I also have never gotten it working on emulators (which run in x86 architecture).