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SzuWei Lin b90ffb0f9a Phase out all _a targets 
The _a targets are build for Legacy GSI for non-system-as-root
partition layout devices. The Android build system is not able
to build a system image with non-system-as-root anymore.
Also, `init` supports mounting system-as-root system image at
all, all devices should no problem to mount it.

Bug: 124278972
Test: none
Change-Id: I9c56e7e5d8517a630854f030616c3b3ecb94b9a8
2019-03-27 12:16:43 +08:00
common Move dexpreopting to Soong 2018-12-17 13:46:17 -08:00
core Merge "Eliminate ENABLE_DEFAULT_TEST_LOCATION as it is always true" 2019-03-26 20:22:37 +00:00
packaging Fix creating _dist_<goal> targets under !dist 2018-10-21 08:56:27 -07:00
target Phase out all _a targets 2019-03-27 12:16:43 +08:00
tests Only set TARGET_PLATFORM version in lunch when explicitly requested 2017-05-01 14:26:40 -07:00
tools Merge "releasetools: Re-enable verifying AVB-signed images." 2019-03-27 03:20:13 +00:00
.gitignore Add build subprojects to .gitignore 2015-07-23 13:18:47 -07:00
buildspec.mk.default Add TARGET_PLATFORM_VERSION to lunch 2017-03-23 09:44:08 -07:00
Changes.md Reland "First pass at creating PRODUCT_HOST_PACKAGES" 2019-03-06 14:46:06 -08:00
CleanSpec.mk Moving system_other key into product.img 2019-03-20 16:18:11 +08:00
envsetup.sh Merge "Add Asuite prebuilds in PATH and remove functions." 2019-02-20 04:51:03 +00:00
help.sh s/product-services/product_services/g 2018-08-20 10:44:59 -07:00
navbar.md Mark envsetup.sh vars as deprecated in makefiles 2017-11-28 14:19:50 -08:00
OWNERS Remove redundant per-file * 2019-03-18 10:21:15 -07:00
README.md Mark envsetup.sh vars as deprecated in makefiles 2017-11-28 14:19:50 -08:00
tapasHelp.sh Remove armv5te 2018-01-08 15:26:16 -08:00
Usage.txt Remove showcommands from docs 2018-07-14 09:32:13 -07:00

README.md

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For an outdated reference on Android.mk files, see build-system.html.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.