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Kelvin Zhang 9a698e6a9f Temporary hack for making T->S downgrade work 
Downgrade OTA was broken because generic_ramdisk was removed from boot
partition in android T. Neither does O6 have init_boot. O6 also doesn't
include generic ramdisk in vendor boot, so no way for otatools to locate
contents of generic ramdisk. As a hack, omit boot partition timestamp if
we can't find ramdisk.

Test: generate T->S downgrade OTA for O6
Bug: 231656318
Change-Id: I9f5359462332aadadc324348873a3a4b2b126068
2022-05-09 10:20:52 -07:00
common Fix BOARD_SYSTEMSDK_VERSIONS checks 2021-11-10 00:34:17 +00:00
core Merge "Extend hardcoded list of optional uses-libraries." 2022-05-05 12:57:54 +00:00
orchestrator Prototype of build orchestrator 2022-04-27 16:33:21 +09:00
packaging Fix creating _dist_<goal> targets under !dist 2018-10-21 08:56:27 -07:00
target Merge "Add android.hardware.usb-V1 to vndk" 2022-04-27 16:21:29 +00:00
tests Add implementations for firstword/lastword 2022-04-28 15:56:33 -07:00
tools Temporary hack for making T->S downgrade work 2022-05-09 10:20:52 -07:00
.gitignore Add build subprojects to .gitignore 2015-07-23 13:18:47 -07:00
banchanHelp.sh Allow selecting a different product in banchan. 2021-04-19 18:32:00 +01:00
buildspec.mk.default Add TARGET_PLATFORM_VERSION to lunch 2017-03-23 09:44:08 -07:00
Changes.md Fix Markdown formatting. 2022-03-09 14:51:51 +00:00
CleanSpec.mk Make SOONG_HOST_OUT an alias for HOST_OUT 2021-11-18 16:26:58 -08:00
Deprecation.md Obsolete unused module types 2020-04-18 21:00:18 -07:00
envsetup.sh envsetup.sh: fix adb tab completion 2022-05-04 14:47:20 +00:00
finalize_branch_for_release.sh Adding -j1 for aidl-freeze-api 2022-05-03 01:51:06 +00:00
help.sh core & tools: system_dlkm: add dynamic partition 2022-01-30 08:43:08 +00:00
METADATA Move comment to license_note 2022-03-03 14:57:46 -08:00
navbar.md Mark envsetup.sh vars as deprecated in makefiles 2017-11-28 14:19:50 -08:00
OWNERS sdk finalization script OWNERS smoreland@ 2022-04-22 22:08:34 +00:00
PREUPLOAD.cfg Disallow use of error-prone merge-strategies 2021-02-23 15:07:02 +00:00
rbesetup.sh Add the ability to source RBE related scripts from envsetup.sh 2021-07-14 11:31:54 -04:00
README.md Mark envsetup.sh vars as deprecated in makefiles 2017-11-28 14:19:50 -08:00
tapasHelp.sh Remove unused mips workarounds. 2020-03-06 16:46:59 -08:00
Usage.txt Remove the PRODUCT-* goal 2019-07-29 14:27:04 -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.