Rewriting the Error Message for Setting Legacy NDK Environment Variable in Python

What will you learn?

By following this tutorial, you will gain insights into resolving the “Build failed” error message that prompts setting the ‘LEGACY_NDK’ environment variable. You will learn how to set this variable to a specific NDK location with gcc/gfortran support.

Introduction to the Problem and Solution

Encountering a build failure due to missing environment variable settings can be frustrating. However, by configuring the ‘LEGACY_NDK’ variable as directed, we can overcome this obstacle effectively. This configuration ensures that our development environment is equipped with essential tools and dependencies required for successful builds.

To address this issue, it is crucial to understand where and how to set the ‘LEGACY_NDK’ environment variable within our Python project configuration.


# Set LEGACY_NDK environment variable pointing to supported NDK version ('r21e')
import os

os.environ['LEGACY_NDK'] = '/path/to/ndk/r21e'

# Your code continues here

# Visit [PythonHelpDesk.com](https://www.pythonhelpdesk.com) for more assistance.

# Copyright PHD


To resolve the build failure related to missing environment variables, we utilize Python’s os module to define an environmental variable named ‘LEGACY_NDK’. By specifying its value as the path to a particular NDK location, such as ‘r21e’, we ensure that the build process can access necessary tools like gcc/gfortran support from within this specified NDK version. This correct environmental setup facilitates smooth building processes in our Python projects without encountering dependency-related errors.

    1. How do I check if an environment variable is already set in Python?

      • You can verify the existence of an environmental variable using os.getenv(‘VARIABLE_NAME’). If it returns None, then the specified environmental variable is not currently set.
    2. Can I change or update an existing environment variable’s value during runtime?

      • Yes, you can modify an environmental variable’s value at runtime by assigning a new value using os.environ[‘VARIABLE_NAME’] = ‘new_value’.
    3. Is it possible to unset or delete an environmental variable from within a Python script?

      • To remove a specific environmental setting (variable), you can use os.environ.pop(‘VARIABLE_NAME’, None) in your Python code.
    4. What happens if I try setting an invalid path for my ‘LEGACY_NDK’ environmental variable?

      • Providing an incorrect path may lead to further build failures when compiling your codebase due to incompatible toolchains.
    5. Can I have multiple paths assigned under a single environmental parameter like ‘LEGACY_NDK’?

      • No, each environmental parameter typically corresponds to only one path at any given time. Consider creating separate variables for managing multiple paths.

In conclusion,…

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