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Cole Faust a5f31a5820 Only search for test suite jdk files once 
compatibility.mk is included 33 times on aosp, and 47 times on
internal master. Each of these would run this shell command, and
there would be an entry in the kati stamp file for each time it was
run, causing this command to be run the 33/47 times every single build.
This took ~0.2 seconds, which can be saved by only running it once.
(However these ~0.2 seconds are parallelized with other parts of the
stamp checking)

Bug: 282079550
Test: m nothing
Change-Id: I364836d1cb0cc26ca9116eda6d954170e1cb7761
2023-05-11 18:22:03 -07:00
common Fix BOARD_SYSTEMSDK_VERSIONS checks 2021-11-10 00:34:17 +00:00
core Only search for test suite jdk files once 2023-05-11 18:22:03 -07:00
packaging Fix creating _dist_<goal> targets under !dist 2018-10-21 08:56:27 -07:00
target Merge "Revert "(reland) Remove emulator dependencies on non emulator ta..."" 2023-05-08 21:59:15 +00:00
tests Fix whitespace in soong_config_set calls 2023-05-02 10:11:02 -07:00
tools Merge "Allow importing starlark code in makefiles" 2023-05-11 17:04:46 +00:00
.gitignore ignore .iml files (IntelliJ) 2022-06-17 12:17:53 -04:00
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 Add BUILD_BROKEN_USES_SOONG_PYTHON2_MODULES 2023-03-09 11:55:29 -08:00
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 lunch support for TARGET_RELEASE 2023-05-08 03:23:30 +00:00
help.sh Add sync to m help 2022-09-22 02:26:10 +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 Remove OWNERS access for non-build team people to core build system 2023-02-28 10:52:10 -08:00
PREUPLOAD.cfg Disallow use of error-prone merge-strategies 2021-02-23 15:07:02 +00:00
rbesetup.sh Update rbesetup.sh script to no longer set certain env variables 2022-05-27 11:31:45 -04:00
README.md Mark envsetup.sh vars as deprecated in makefiles 2017-11-28 14:19:50 -08:00
shell_utils.sh Pull common methods into shell_utils.sh, which can be included by scripts. 2023-01-03 14:12:43 -08:00
tapasHelp.sh Add a keys argument to tapas 2022-02-07 18:50:22 +00:00
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.