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Make the language version selection smarter

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Any artifacts that are targeting SDK versions < 24
and not explicitly setting the LOCAL_JAVA_LANGUAGE_VERSION
are now defaulted to 1.7.

Bug: 27495650
Bug: 26753820
Bug: 27377071
Change-Id: Ia903cd5bf14c1947c485384d095a93c0aa23d272
This commit is contained in:
Neil Fuller 2016-03-04 18:00:00 +00:00
parent aad03eceed
commit decb797276
1 changed files with 17 additions and 1 deletions
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18
core/java_common.mk
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@ -3,8 +3,24 @@
###########################################################
## Java version
###########################################################
# Use the LOCAL_JAVA_LANGUAGE_VERSION if it is set, otherwise
# use one based on the LOCAL_SDK_VERSION. If it is < 24
# pass "1.7" to the tools, if it is unset, >= 24 or "current"
# pass "1.8".
#
# The LOCAL_SDK_VERSION behavior is to ensure that, by default,
# code that is expected to run on older releases of Android
# does not use any 1.8 language features that are not supported
# on earlier runtimes (like default / static interface methods).
# Modules can override this logic by specifying
# LOCAL_JAVA_LANGUAGE_VERSION explicitly.
ifeq (,$(LOCAL_JAVA_LANGUAGE_VERSION))
LOCAL_JAVA_LANGUAGE_VERSION := 1.8
private_sdk_versions_without_any_java_18_support := 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
ifneq (,$(filter $(LOCAL_SDK_VERSION), $(private_sdk_versions_without_any_java_18_support)))
LOCAL_JAVA_LANGUAGE_VERSION := 1.7
else
LOCAL_JAVA_LANGUAGE_VERSION := 1.8
endif
endif
LOCAL_JAVACFLAGS += -source $(LOCAL_JAVA_LANGUAGE_VERSION) -target $(LOCAL_JAVA_LANGUAGE_VERSION)