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Yifan Hong c0f904e069 Extracting kernel should not depend on system/vendor build. 
If system and vendor are built separately, none of the two
builds contained kernel information. The process of extracting
kernel information shouldn't depend on system and vendor
builds, but on the existance of the kernel image.

With this change, one of system or vendor build may have
INSTALLED_KERNEL_IMAGE defined and the other has
PRODUCT_OTA_ENFORCE_VINTF_KERNEL_REQUIREMENTS defined. The one
with INSTALLED_KERNEL_IMAGE defined will contain kernel information
in target files.

After target files are merged, check_target_files_vintf will kick
in to do the checks properly.

Test: forrest
Bug: 180475190
Change-Id: I8d887dd94e1171ab277f02f25534caf098e3faae
 		2021-03-19 12:50:38 -07:00
common Preserve <uses-library> order in dexpreopt.config files. 2021-02-11 17:09:19 +00:00
core Extracting kernel should not depend on system/vendor build. 2021-03-19 12:50:38 -07:00
packaging Fix creating _dist_<goal> targets under !dist 2018-10-21 08:56:27 -07:00
target Do not pack symbolic link instead copying 2021-03-15 17:13:50 +08:00
tests Only set TARGET_PLATFORM version in lunch when explicitly requested 2017-05-01 14:26:40 -07:00
tools Merge "Trigger data wipe on spl-downgrade as well" 2021-03-12 18:50:38 +00:00
.gitignore Add build subprojects to .gitignore 2015-07-23 13:18:47 -07:00
Android.bp [LSC] Add LOCAL_LICENSE_KINDS to build/make 2021-02-14 10:37:20 -08:00
Changes.md Fix typo in sysprop.mk and Changes.md 2021-03-02 08:51:03 +09:00
CleanSpec.mk Rename vendor-ramdisk to vendor_ramdisk 2021-03-03 13:56:48 -08:00
Deprecation.md Obsolete unused module types 2020-04-18 21:00:18 -07:00
METADATA Fix license_type. Contains GPL 2021-02-09 14:00:16 -08:00
OWNERS Refactor OWNERS files in platform/build/make. 2020-10-08 16:14:44 -07:00
PREUPLOAD.cfg Disallow use of error-prone merge-strategies 2021-02-23 15:07:02 +00:00
README.md Mark envsetup.sh vars as deprecated in makefiles 2017-11-28 14:19:50 -08:00
Usage.txt Remove the PRODUCT-* goal 2019-07-29 14:27:04 -07:00
buildspec.mk.default Add TARGET_PLATFORM_VERSION to lunch 2017-03-23 09:44:08 -07:00
envsetup.sh Add "ktgrep" for Kotlin 2021-03-16 15:10:34 +09:00
help.sh Update m help text with guidance on parallelism 2021-03-01 13:32:13 -08:00
navbar.md Mark envsetup.sh vars as deprecated in makefiles 2017-11-28 14:19:50 -08:00
rbesetup.sh Switch default execution strategy to racing for developer builds 2020-11-25 12:14:16 -05:00
tapasHelp.sh Remove unused mips workarounds. 2020-03-06 16:46:59 -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.