Building React Native from source failed

1. The following error is found in gradle sync phase:

ERROR: Manifest merger failed : Attribute application@appComponentFactory value=(android.support.v4.app.CoreComponentFactory) from [com.android.support:support-compat:28.0.0] AndroidManifest.xml:22:18-91
	is also present at [androidx.core:core:1.0.1] AndroidManifest.xml:22:18-86 value=(androidx.core.app.CoreComponentFactory).
	Suggestion: add 'tools:replace="android:appComponentFactory"' to <application> element at AndroidManifest.xml:7:5-117 to override.

It could be fixed by adding the following two lines,

android.useAndroidX=true
android.enableJetifier=true

to gradle.properties of the app project

1. Then comes to the second error,

06-06 17:59:17.698 26292-26336/com.fromsource E/dalvikvm: dlopen("/data/app-lib/com.fromsource-1/libjscexecutor.so") failed: dlopen failed: 
06-06 17:59:17.698 26292-26336/com.fromsource E/SoLoader: couldn't find DSO to load: libjscexecutor.so caused by: dlopen failed: 
06-06 17:59:17.698 26292-26336/com.fromsource W/dalvikvm: Exception Ljava/lang/UnsatisfiedLinkError; thrown while initializing Lcom/facebook/react/jscexecutor/JSCExecutor;
06-06 17:59:17.698 26292-26336/com.fromsource W/dalvikvm: threadid=18: thread exiting with uncaught exception (group=0x418ccc68)
06-06 17:59:17.708 26292-26336/com.fromsource E/AndroidRuntime: FATAL EXCEPTION: create_react_context
    Process: com.fromsource, PID: 26292
    java.lang.UnsatisfiedLinkError: couldn't find DSO to load: libjscexecutor.so caused by: dlopen failed: 
        at com.facebook.soloader.SoLoader.doLoadLibraryBySoName(SoLoader.java:738)
        at com.facebook.soloader.SoLoader.loadLibraryBySoName(SoLoader.java:591)
        at com.facebook.soloader.SoLoader.loadLibrary(SoLoader.java:529)
        at com.facebook.soloader.SoLoader.loadLibrary(SoLoader.java:484)
        at com.facebook.react.jscexecutor.JSCExecutor.<clinit>(JSCExecutor.java:19)
        at com.facebook.react.jscexecutor.JSCExecutorFactory.create(JSCExecutorFactory.java:29)
        at com.facebook.react.ReactInstanceManager$5.run(ReactInstanceManager.java:956)
        at java.lang.Thread.run(Thread.java:841)
06-06 17:59:17.768 26292-26292/com.fromsource W/linker: library "libmaliinstr.so" not found

Which can be fixed by removing the following line (271)

task packageReactNdkLibs(dependsOn: buildReactNdkLib, type: Copy) {
    from("$buildDir/react-ndk/all")
    into("$buildDir/react-ndk/exported")
    exclude("**/libjsc.so")  <-----------------------remove this line
}

in build.gradle of ReactAndroid project

React Native version: master react-native-cli version: 2.0.1

Steps To Reproduce

1. Create a React Native app using react-native-cli (version as indicated above)
2. Follow the instructions from https://github.com/facebook/react-native/wiki/Building-from-source

Describe what you expected to happen (next):

1. Add AndroidX related instructions to the https://github.com/facebook/react-native/wiki/Building-from-source
2. Not sure why exclude("**/libjsc.so") is there. If it is not intentional (for another deployment path), then it is required to be removed.

[nguyenhose]

@felansu lol I got that react-native-camera too. wonder if upgrade to androidx is correct path or not

---

solved it: yarn add react-native-device-info@2.1.2 clean and rebuild

[nhunzaker]

I hit this as well and was able to resolve the issue by following the instructions above.

Thanks @holmeshe! You saved me a lot of time!