5f36a62622
Before this CL topic, the build toolchain for .java source files
used OpenJDK 8, targeting 1.8 (v52 class files) by default.
This CL topic switches the default to OpenJDK 9, but still
targeting 1.8 (v52 class files) by default. If USE_ERROR_PRONE
is set to true, then the default remains OpenJDK 8.
Code in the Android platform should generally be unaffected,
but if host tools that are now compiled and run using
OpenJDK 9 are causing problems for your team, then let me
know.
To manually switch back to the old behavior for now (continue
using OpenJDK 8), run this command in your shell:
export EXPERIMENTAL_USE_OPENJDK9=false
Bug: 69449021
Test: Treehugger
Test: "make core-oj", checked that compilation now uses
OpenJDK 9 javac -target 1.8
Test: Checked that this is still compiled using OpenJDK 8.
export EXPERIMENTAL_USE_OPENJDK9=false
make core-oj
Change-Id: Iadae20d25e37d2cf0a89918a54af51fab1a4f01d
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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For an outdated reference on Android.mk files, see build-system.html.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.