react native 063 ld: library not found for -lDoubleConversion

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06-10-2024

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React Native 0.63: "ld: library not found for -lDoubleConversion" - A Common Issue and Its Solution

Problem: You're working on a React Native project and encounter the frustrating error "ld: library not found for -lDoubleConversion". This error typically occurs when trying to build your project, particularly after updating to React Native 0.63 or higher. It signifies that the linker cannot find the necessary library, leading to build failure.

Let's break it down: Imagine you're building a house, and you need specific tools and materials. The linker acts like a builder, putting everything together. In this case, "DoubleConversion" is a tool (library) required for certain processes, and the linker can't locate it.

Scenario: You've upgraded your React Native project to version 0.63 or later, and you're now encountering this issue. Your code might look something like this:

// App.js
import React from 'react';
import { View, Text } from 'react-native';

const App = () => {
  return (
    <View>
      <Text>Hello, world!</Text>
    </View>
  );
};

export default App;

Analysis and Solution: This error arises due to changes in React Native 0.63 and above, where the react-native-community/jsc-android package was deprecated. The DoubleConversion library is now included in the core React Native library, but it's not automatically linked.

Here's the fix:

1. Open your project's android/app/build.gradle file.

2. Add the following line inside the dependencies block:

   implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version" 
   

3. Save the changes and run ./gradlew clean in your project's root directory. This cleans your build files and ensures the changes are reflected.

4. Try building your app again. You should now see the error resolved.

Explanation:

The added line implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version" explicitly adds the necessary Kotlin library that contains the DoubleConversion library, resolving the linker issue.

Additional Information:

• If you're still facing problems, ensure you have the correct version of react-native and other relevant dependencies installed.
• Use npm install or yarn install to install or update packages.
• Consider checking for any other error messages in your logs for more information.
• If you're working with a third-party library that relies on DoubleConversion, it might need its own configuration steps to ensure it's linked correctly.

References and Resources:

• React Native Documentation
• React Native Community
• Stack Overflow - A great resource for searching and finding solutions to various coding problems.

By understanding the cause and applying the right solution, you can successfully navigate this common error and continue building your React Native applications.