Webrtc android build error

[coding guy]

HI All

i have used below command for building webrtc for android platform in ubuntu 16.04

and i have installed manually JDK version 1.8 

./build.sh -c arm -t android 

But it is giving error . Could you please aware about below error ? 

[4027/5428] ACTION //rtc_base:base_jav...d/toolchain/android:android_clang_arm)

FAILED: obj/rtc_base/base_java.turbine.jar gen/rtc_base/base_java.generated.srcjar 

python3 ../../../build/android/gyp/turbine.py --depfile=gen/rtc_base/base_java__header.d --generated-dir=gen/rtc_base/base_java/generated_java --jar-path=obj/rtc_base/base_java.turbine.jar --java-srcjars=\[\] --target-name //rtc_base:base_java__header --classpath=@FileArg\(gen/rtc_base/base_java.build_config:javac:interface_classpath\) --processorpath=@FileArg\(gen/rtc_base/base_java.build_config:javac:processor_classpath\) --processors=@FileArg\(gen/rtc_base/base_java.build_config:javac:processor_classes\) --turbine-jar-path ../../../third_party/turbine/turbine.jar --generated-jar-path gen/rtc_base/base_java.generated.srcjar --java-version=1.8 --bootclasspath=@FileArg\(gen/rtc_base/base_java.build_config:android:sdk_interface_jars\) --chromium-code=1 --jar-info-exclude-globs=\[\"\*/R.class\",\ \"\*/R\\\$\*.class\",\ \"\*/Manifest.class\",\ \"\*/Manifest\\\$\*.class\",\ \"\*/GEN_JNI.class\"\] @gen/rtc_base/base_java.sources

Traceback (most recent call last):

  File "../../../build/android/gyp/turbine.py", line 15, in <module>

    import javac_output_processor

  File "/home/venbab/webrtc/webrtc-builds-master/out/src/build/android/gyp/javac_output_processor.py", line 23, in <module>

    import lookup_dep

  File "../../../tools/android/modularization/convenience/lookup_dep.py", line 67

    abs_out_dir: pathlib.Path = pathlib.Path(

               ^

SyntaxError: invalid syntax

[4028/5428] CXX obj/video/video/rtp_video_stream_receiver2.o

warning: unknown warning option '-Wno-maybe-uninitialized'; did you mean '-Wno-uninitialized'? [-Wunknown-warning-option]

warning: unknown warning option '-Wno-packed-not-aligned'; did you mean '-Wno-over-aligned'? [-Wunknown-warning-option]

warning: unknown warning option '-Wno-class-memaccess'; did you mean '-Wno-class-varargs'? [-Wunknown-warning-option]

3 warnings generated.

ninja: build stopped: subcommand failed.

thank uyou