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Hridya Valsaraju 59eaef078d Allow for the DTB image to be built by the Android build system. 
The current solution expects BOARD_PREBUILT_DTBIMAGE_DIR to
contain prebuilt DTB files that are concatenated by the build system
to create $OUT/dtb.img. In order to accommodate devices that build
the dtb image locally, make boot.img creation depend on $OUT/dtb.img
only when BOARD_PREBUILT_DTBIMAGE_DIR is undefined.

Bug: 133161451
Test: Build with BOARD_PREBUILT_DTBIMAGE_DIR undefined and verify
using unpack_bootimg.py that $OUT/dtb.img was included in boot.img.

Change-Id: Iae2c634ccdc1d83589b26d382882f75fb8565a31
 		2019-05-22 03:51:41 +00:00
common Move dexpreopting to Soong 2018-12-17 13:46:17 -08:00
core Allow for the DTB image to be built by the Android build system. 2019-05-22 03:51:41 +00:00
packaging Fix creating _dist_<goal> targets under !dist 2018-10-21 08:56:27 -07:00
target Add product manifest. 2019-04-25 10:22:36 -07:00
tests Only set TARGET_PLATFORM version in lunch when explicitly requested 2017-05-01 14:26:40 -07:00
tools Merge "releasetools: GetCareMap supports non-sparse image." 2019-04-26 22:59:30 +00:00
.gitignore Add build subprojects to .gitignore 2015-07-23 13:18:47 -07:00
Changes.md Add infrastructure for deprecating module types 2019-04-17 17:02:20 -07:00
CleanSpec.mk Remove libjavacrypto from system image. 2019-04-26 10:28:16 +01:00
Deprecation.md Add infrastructure for deprecating module types 2019-04-17 17:02:20 -07:00
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
Usage.txt Remove showcommands from docs 2018-07-14 09:32:13 -07:00
buildspec.mk.default Add TARGET_PLATFORM_VERSION to lunch 2017-03-23 09:44:08 -07:00
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
tapasHelp.sh Remove armv5te 2018-01-08 15:26:16 -08:00

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For an outdated reference on Android.mk files, see build-system.html.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