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Kelvin Zhang 05ff7055b6 Add spl-downgrade field to ota metadata 
In aosp/1581143 , we banned generation of SPL downgrade OTAs. However,
caller of OTA script can still force an SPL downgrade OTA by passing
--spl_downgrade flag. If this flag is specified, we propagate it to OTA
metadata so that GOTA server can properly honor this flag.

Test: th
Change-Id: Ic8cdc850d2210f4149ad9121fa4ed2e5a4f59bcc
2021-02-25 10:15:45 -05:00
common Preserve <uses-library> order in dexpreopt.config files. 2021-02-11 17:09:19 +00:00
core Merge "Deprecate PRODUCT_ENFORCE_RRO_EXEMPTED_TARGETS" 2021-02-20 01:47:43 +00:00
packaging Fix creating _dist_<goal> targets under !dist 2018-10-21 08:56:27 -07:00
target Merge "Add on-device signing binary to base." 2021-02-19 11:31:50 +00:00
tests Only set TARGET_PLATFORM version in lunch when explicitly requested 2017-05-01 14:26:40 -07:00
tools Add spl-downgrade field to ota metadata 2021-02-25 10:15:45 -05:00
.gitignore
Android.bp [LSC] Add LOCAL_LICENSE_KINDS to build/make 2021-02-14 10:37:20 -08:00
buildspec.mk.default Add TARGET_PLATFORM_VERSION to lunch 2017-03-23 09:44:08 -07:00
Changes.md Require required modules to exist 2020-08-06 06:41:09 +00:00
CleanSpec.mk Add clean step to remove Soong's host copies of libconscrypt_openjdk_jni.so 2020-10-09 08:42:13 +00:00
Deprecation.md Obsolete unused module types 2020-04-18 21:00:18 -07:00
envsetup.sh envsetup: add rgrep for local Rust files 2021-02-02 19:18:26 +01:00
help.sh Revert "Add modules partition." 2020-09-15 19:09:26 +00:00
METADATA Fix license_type. Contains GPL 2021-02-09 14:00:16 -08:00
navbar.md Mark envsetup.sh vars as deprecated in makefiles 2017-11-28 14:19:50 -08:00
OWNERS Refactor OWNERS files in platform/build/make. 2020-10-08 16:14:44 -07:00
rbesetup.sh Switch default execution strategy to racing for developer builds 2020-11-25 12:14:16 -05:00
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For an outdated reference on Android.mk files, see build-system.html.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.