Disabling JACK in android compilation

Question

Does anybody know how to completely disable jack while compiling AOSP (Master)?

I've always had problems with jack, so I've just always turned it off by adding ANDROID_COMPILE_WITH_JACK := false in BoardConfig.mk (when compiling CyanogenMod). I'm now compiling aosp and it just seems to ignore this command.

Note: I'm not really trying to solve any jack related issues I have, I'm trying to turn it off.

Answer 1

I would recommend to use AOSP tag to build instead of master branch. For example, latest released Marshmallow is android-6.0.1_r43 tag.

So let's look at clear_vars.mk which is responsible for default values: https://android.googlesource.com/platform/build/+/android-6.0.1_r43/core/clear_vars.mk#110

LOCAL_JACK_ENABLED:=$(DEFAULT_JACK_ENABLED) # '' (ie disabled), disabled, full, incremental

So you either have to override LOCAL_JACK_ENABLED per module in Android.mk or define global default value with DEFAULT_JACK_ENABLED variable.

P.S. It's better to ask such questions on Google Groups: https://groups.google.com/forum/#!forum/android-building

Answer 2

You can disable the JACK without to change any code.

make ANDROID_COMPILE_WITH_JACK:=false

Just do it when making the entire Android Project.

The magic is in build/make/combo/javac.mk:

ifndef ANDROID_COMPILE_WITH_JACK
# Defines if compilation with jack is enabled by default.
ANDROID_COMPILE_WITH_JACK := true
endif

And build/make/core/config.mk:

ifeq ($(ANDROID_COMPILE_WITH_JACK),true)
DEFAULT_JACK_ENABLED:=full
else
DEFAULT_JACK_ENABLED:=
endif

And build/make/core/clear_vars.mk:

LOCAL_JACK_ENABLED:=DEFAULT_JACK_ENABLED

It also indicates why your modification in a local module is in vain.