24d9cad563
foo=true
foo=true
foo?=false
Consider the above case: Then the duplication of foo is allowed because
they have the same value (true). However, there was a bug that the
optional assirgnment foo?=false is left unmodified.
This fixes the bug by commenting such optional assignments.
Exempt-From-Owner-Approval: fixes a broken build
Bug: 117892318
Bug: 158735147
Test: atest test_post_process_props
Test: m out/target/product/vsoc_x86/vendor/build.prop for cf_x86_auto
Exempt-From-Owner-Approval: cherry-pick from master
Merged-In: Iba9b61d9779d93e86d9bead2286f945f8d51ab1d
(cherry picked from commit 9a32636759)
Change-Id: Iba9b61d9779d93e86d9bead2286f945f8d51ab1d
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For an outdated reference on Android.mk files, see build-system.html.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.