Book Image

Android NDK: Beginner's Guide

By : Sylvain Ratabouil
Book Image

Android NDK: Beginner's Guide

By: Sylvain Ratabouil

Overview of this book

Table of Contents (18 chapters)
Android NDK Beginner's Guide Second Edition
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
Index

Mastering module Makefiles


Android Makefiles are an essential piece of the NDK building process. Thus, to build and manage a project properly, it is important to understand the way they work.

Makefile variables

Compilation settings are defined through a set of predefined NDK variables. We have already seen the three most important ones: LOCAL_PATH, LOCAL_MODULE, and LOCAL_SRC_FILES, but many others exist. We can differentiate the following four types of variables, each with a different prefix:

  • LOCAL_ variables: These are dedicated to individual module compilation and are defined in Android.mk files.

  • APP_ variables: These refer to application-wide options and are set in Application.mk.

  • NDK_ variables: These are mainly internal variables that usually refer to environment variables (for example, NDK_ROOT, NDK_APP_CFLAGS, or NDK_APP_CPPFLAGS). There are two notable exceptions: NDK_TOOLCHAIN_VERSION and NDK_APPLICATION_MK. The latter can be passed to the NDK-Build in parameter to define a different...