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Tom Cherry 2929cadb3b Allow BOARD_USES_RECOVERY_AS_BOOT without BOARD_BUILD_SYSTEM_ROOT_IMAGE 
The recovery image already contains a copy of first stage init, so we
can boot unconditionally to the recovery image and instruct first
stage init whether or not to boot to Android or to recovery.  In this
case, we need neither the kernel to mount /system as / nor a separate
partition for recovery, so this change modifies the build scripts to
allow this combination.

Bug: 114062208
Test: Boot pixel from recovery to Android with BOARD_USES_RECOVERY_AS_BOOT
      But without BOARD_BUILD_SYSTEM_ROOT_IMAGE
Change-Id: Icd047afb7f22d2724b3bcaca1aa0c837426dcce7
2018-09-26 20:30:36 +00:00
core Allow BOARD_USES_RECOVERY_AS_BOOT without BOARD_BUILD_SYSTEM_ROOT_IMAGE 2018-09-26 20:30:36 +00:00
target Merge "Add recovery-persist to base_system" 2018-09-20 21:26:53 +00:00
tests Only set TARGET_PLATFORM version in lunch when explicitly requested 2017-05-03 02:47:59 +00:00
tools Allow BOARD_USES_RECOVERY_AS_BOOT without BOARD_BUILD_SYSTEM_ROOT_IMAGE 2018-09-26 20:30:36 +00:00
.gitignore
Android.mk Fix the build when using findleaves.py 2017-08-08 09:45:12 -07:00
buildspec.mk.default Add TARGET_PLATFORM_VERSION to lunch 2017-03-23 09:44:08 -07:00
Changes.md Add doc update for phony targets 2018-09-04 16:27:16 -07:00
CleanSpec.mk Remove *_OUT_INTERMEDIATE_LIBRARIES 2018-09-15 10:52:13 -07:00
envsetup.sh Add Atest tab completion script. 2018-07-17 14:27:32 +08:00
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 Use multiple globs/emails in per-file syntax 2018-08-20 14:16:04 -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For an outdated reference on Android.mk files, see build-system.html.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.