Bug 646956

Summary:	sys-apps/baselayout-java: JAVAC env variable clashes with Android build system
Product:	Gentoo Linux	Reporter:	John Einar Reitan <john.einar>
Component:	Current packages	Assignee:	Java team <java>
Status:	UNCONFIRMED ---
Severity:	normal	CC:	gabemarcano, kaikaikai, tanekliang, xavier.miller
Priority:	Normal
Version:	unspecified
Hardware:	All
OS:	Linux
Whiteboard:
Package list:		Runtime testing required:	---
Attachments:	emerge --info

Description John Einar Reitan 2018-02-08 07:29:18 UTC

As /etc/profile.d/java-config-2.sh exports $JAVAC, the Android build system complains as it also tries to use it:

make -j80
============================================
PLATFORM_VERSION_CODENAME=P
PLATFORM_VERSION=P
TARGET_PRODUCT=aosp_arm
TARGET_BUILD_VARIANT=eng
TARGET_BUILD_TYPE=release
TARGET_ARCH=arm
TARGET_ARCH_VARIANT=armv7-a
TARGET_CPU_VARIANT=generic
HOST_ARCH=x86_64
HOST_2ND_ARCH=x86
HOST_OS=linux
HOST_OS_EXTRA=Linux-4.14.15-gentoo-x86_64-Gentoo/Linux
HOST_CROSS_OS=windows
HOST_CROSS_ARCH=x86
HOST_CROSS_2ND_ARCH=x86_64
HOST_BUILD_TYPE=release
BUILD_ID=OC-MR1
OUT_DIR=out
============================================
[1/1] out/soong/.minibootstrap/minibp out/soong/.bootstrap/build.ninja
removed old ninja-created file out/soong/.bootstrap/docs/soong_build.html because it has no rule to generate it
[57/58] glob prebuilts/ndk/stl.bp
[75/75] out/soong/.bootstrap/bin/soong_build out/soong/build.ninja
out/build-aosp_arm-cleanspec.ninja is missing, regenerating...
out/soong/make_vars-aosp_arm.mk:545: warning: JAVAC does not match between Make and Soong:
out/soong/make_vars-aosp_arm.mk:545: warning: Make : /etc/java-config-2/current-system-vm/bin/javac
out/soong/make_vars-aosp_arm.mk:545: warning: Soong: prebuilts/jdk/jdk9/linux-x86/bin/javac
out/soong/make_vars-aosp_arm.mk:837: error: Soong variable check failed.
08:16:15 ckati failed with: exit status 1
make: *** [build/make/core/main.mk:21: run_soong_ui] Error 1


If I 'unset JAVAC' then the build succeeds.
Is JAVAC a standardizes env variable?
Or is it just a too overloaded variable across various systems (I've found plenty other build systems that set JAVAC) that Gentoo should try to avoid it?

Comment 1 John Einar Reitan 2018-02-08 07:30:19 UTC

Created attachment 518544 [details]
emerge --info

Comment 2 Xavier Miller 2023-01-15 16:45:46 UTC

the LEX environment variable is also problematic.

If I 

unset JAVAC
unset JAVA_HOME
unset JDK_HOME
unset LEX


the build scripts run fine

Comment 3 John Einar Reitan 2023-01-16 19:25:26 UTC

Guess Gentoo should have established a common prefix to avoid such clashes.

Comment 4 unlord 2023-02-18 18:41:34 UTC

JAVAC is now unset by soong upstream:

https://android.googlesource.com/platform/build/soong/+/7b067fb75

Please confirm this fixes the issue for you.

Comment 5 Gabriel Marcano 2023-04-12 17:56:07 UTC

This does not fix the issue for me alone, as I also have to unset LEX for the build process to continue.

Comment 6 yongxiang 2023-08-13 12:15:03 UTC

(In reply to Xavier Miller from comment #2)
> the LEX environment variable is also problematic.
> 
> If I 
> 
> unset JAVAC
> unset JAVA_HOME
> unset JDK_HOME
> unset LEX
> 
> 
> the build scripts run fine

I tried to compile LineageOS 20.0 and had a similar problem. This solution worked for me