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PLATFORM_SYSTEMSDK_VERSIONS is the list of System SDK versions that the platform is supporting. Contrary to the public SDK where platform essentially supports all previous SDK versions, platform support only a few recent System SDK versions, since some of old System APIs are gradually deprecated, removed from the following SDKs and then finally deleted from the platform. This will be part of the framework manifest. The list can be specified by setting PLATFORM_SYSTEMSDK_MIN_VERSION. If it is set to an old version number, then System SDKs from the version to the current version (PLATFORM_SDK_VERSION) are considered to be supported by the platform. If PLATFORM_SYSTEMSDK_MIN_VERSION is not set, only the latest System SDK version is supported. Next, BOARD_SYSTEMSDK_VERSIONS is the list of System SDK versions that the device is using. This is put to the device compatibility matrix device is using. The device and the platform is considered as compatible only BOARD_SYSTEMSDK_VERSIONS in the device compatibility matrix are in the PLATFORM_SYSTEMSDK_VERSIONS in the framework manifest. When BOARD_SYSTEMSDK_VERSIONS is set, a Java app or library in vendor or odm partitions which didn't specify LOCAL_SDK_VERSION is forced to use System SDK. Also, the build system does the additional integrity check to ensure that LOCAL_SDK_VERSION is within BOARD_SYSTEMSDK_VERSIONS or PLATFORM_SYSTEMSDK_VERSIONS (if BOARD_SYSTEMSDK_VERSIONS isn't set). Bug: 69088799 Test: m -j Test: BOARD_SYSTEMSDK_VERSIONS=P m -j Change-Id: If4d59f6030e4cc402e015701d0caf94aeec37263 |
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core | ||
target | ||
tests | ||
tools | ||
.gitignore | ||
Android.mk | ||
Changes.md | ||
CleanSpec.mk | ||
OWNERS | ||
README.md | ||
Usage.txt | ||
buildspec.mk.default | ||
envsetup.sh | ||
help.sh | ||
navbar.md | ||
tapasHelp.sh |
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For an outdated reference on Android.mk files, see build-system.html.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.