Make X86 has a error,please help me how to set the classpath

checking if uudecode can decode base 64 file... yes
checking if jamvm works... configure: error: The Java VM jamvm failed (see config.log, check the CLASSPATH?)
Makefile:94: recipe for target '/home/de/openwrt/build_dir/target-x86_64_musl/classpath-0.99/.configured_68b329da9893e34099c7d8ad5cb9c940' failed
make[3]: *** [/home/de/openwrt/build_dir/target-x86_64_musl/classpath-0.99/.configured_68b329da9893e34099c7d8ad5cb9c940] Error 1
make[3]: Leaving directory '/home/de/openwrt/feeds/packages/libs/classpath'
time: package/feeds/packages/classpath/compile#5.00#3.10#10.84
package/Makefile:111: recipe for target 'package/feeds/packages/classpath/compile' failed
make[2]: *** [package/feeds/packages/classpath/compile] Error 2
make[2]: Leaving directory '/home/de/openwrt'
package/Makefile:107: recipe for target '/home/de/openwrt/staging_dir/target-x86_64_musl/stamp/.package_compile' failed
make[1]: *** [/home/de/openwrt/staging_dir/target-x86_64_musl/stamp/.package_compile] Error 2
make[1]: Leaving directory '/home/de/openwrt'
/home/de/openwrt/include/toplevel.mk:225: recipe for target 'world' failed
make: *** [world] Error 2
de@ubuntu:~/openwrt$ make clean

de@ubuntu:~/openwrt$ echo $JAVA_HOME
/usr/lib/jvm/java-8-openjdk-amd64
de@ubuntu:~/openwrt$ echo $PATH
/usr/lib/jvm/java-8-openjdk-amd64/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games
de@ubuntu:~/openwrt$ $echo $CLASSPATH
-bash: .:/usr/lib/jvm/java-8-openjdk-amd64/lib:/usr/lib/jvm/java-8-openjdk-amd64/jre/lib: No such file or directory
de@ubuntu:~/openwrt$

A post was merged into an existing topic: Error building X86 image: The Java VM jamvm failed