afe55106e5
By caching flag values directly in member variables instead of caching a HashMap and accessing that, flag reads avoid `hashCode()`, map lookup, and Boolean.parse runtime costs. Flag reads are turning out to have performance problems in hot paths, so this should help to alleviate that. Bug: 309625014 Test: m Change-Id: I923bf6af2ae3fcbbf2fee7126b492a47cd6049ad
Android Make Build System
This is the Makefile-based portion of the Android Build System.
For documentation on how to run a build, see Usage.txt
For a list of behavioral changes useful for Android.mk writers see Changes.md
For an outdated reference on Android.mk files, see build-system.html. Our Android.mk files look similar, but are entirely different from the Android.mk files used by the NDK build system. When searching for documentation elsewhere, ensure that it is for the platform build system -- most are not.
This Makefile-based system is in the process of being replaced with Soong, a new build system written in Go. During the transition, all of these makefiles are read by Kati, and generate a ninja file instead of being executed directly. That's combined with a ninja file read by Soong so that the build graph of the two systems can be combined and run as one.