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SzuWei Lin 0c791bedb4 Support building EROFS for GSI targets 
The EROFS is planned to replace the ext4 as the file system format
of readonly partitions. This patch is enabling the ability to
build GSI with EROFS. The usage is

  $ GSI_FILE_SYSTEM_TYPE=erofs make -j

Bug: 227552340
Test: lunch gsi_arm64-user; GSI_FILE_SYSTEM_TYPE=erofs make -j
Test: Verify the file system format of system.img
Change-Id: Ie815002c677d099c4db0ab7ca22db16ac6123659
2022-04-07 07:11:24 +00:00
common Fix BOARD_SYSTEMSDK_VERSIONS checks 2021-11-10 00:34:17 +00:00
core Merge "Support per-partition settings for os_version AVB props" 2022-03-31 02:27:04 +00:00
packaging Fix creating _dist_<goal> targets under !dist 2018-10-21 08:56:27 -07:00
target Support building EROFS for GSI targets 2022-04-07 07:11:24 +00:00
tests Fix single value inheritance 2022-03-23 15:28:48 -07:00
tools Merge "Support OUT_DIR for license graph." 2022-03-24 00:43:58 +00:00
.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 add flag to skip soong tests for b command 2022-03-29 14:39:33 +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 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
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.