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Build with OpenJDK 9 -target 1.8 by default except for errorprone.

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(This is cherry-picked from the first attempt to submit this CL
topic, which was reverted after 3 hours because of bug 70286093;
robolectric 3.{1.1,4.2} now stick with OpenJDK 8 to avoid that bug).

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: Running robolectric tests succeeds on internal-master
      after cherry-picking this CL topic, using the command
      line from http://b/70286093#comment1

(cherry picked from commit 5f36a62622)

Change-Id: I4972c714ed80c35328895e88675b56bf0e195c01
This commit is contained in:
Tobias Thierer 2017-11-17 14:06:51 +00:00
parent 5006ee95fc
commit ab1e54d5f1
1 changed files with 4 additions and 0 deletions
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4
core/config.mk
View file

@ -699,7 +699,11 @@ ANDROID_MANIFEST_MERGER := $(JAVA) \
COLUMN:= column
ifeq ($(EXPERIMENTAL_USE_OPENJDK9),)
ifeq ($(RUN_ERROR_PRONE),true)
USE_OPENJDK9 :=
else
USE_OPENJDK9 := true
endif
TARGET_OPENJDK9 :=
else ifeq ($(EXPERIMENTAL_USE_OPENJDK9),false)
USE_OPENJDK9 :=