ecj throws exception NoClassDefFoundError (SourceVersion)

[tmatz]

Problem description

ecj throws exception when compiling java source file.

$ecj Hello.java
Exception in thread "main" java.lang.NoClassDefFoundError: Failed resolution of: Ljavax/lang/model/SourceVersion;
        at org.eclipse.jdt.internal.compiler.batch.FileSystem.<clinit>(FileSystem.java:180)
        at org.eclipse.jdt.internal.compiler.batch.FileSystem.getClasspath(Unknown Source:0)
        at org.eclipse.jdt.internal.compiler.util.Util.collectPlatformLibraries(Util.java:1248)
        at org.eclipse.jdt.internal.compiler.util.Util.collectVMBootclasspath(Util.java:1161)
        at org.eclipse.jdt.internal.compiler.batch.Main.handleBootclasspath(Main.java:3561)
        at org.eclipse.jdt.internal.compiler.batch.Main.setPaths(Main.java:5258)
        at org.eclipse.jdt.internal.compiler.batch.Main.configure(Main.java:3225)
        at org.eclipse.jdt.internal.compiler.batch.Main.compile(Main.java:1752)
        at org.eclipse.jdt.internal.compiler.batch.Main.main(Main.java:1496)
Caused by: java.lang.ClassNotFoundException: Didn't find class "javax.lang.model.SourceVersion" on path: DexPathList[[zip file "/data/data/com.termux/files/usr/share/dex/ecj.jar"],nativeLibraryDirectories=[/system/lib64, /system/lib64]]
        at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:134)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:379)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
        ... 9 more

Steps to reproduce

Just compile following source.

Hello.java

public class Hello {
  public static void main(String[] args) {
    System.out.println("Hellod, on termux!");
  }
}

Expected behavior

Maybe .class file is created. (I never succeeded)

Additional information

$ecj -version
Eclipse Compiler for Java(TM) v20191203-2131, 3.20.0, Copyright IBM Corp 2000, 2015. All rights reserved.

Packages CPU architecture:
aarch64
Subscribed repositories:
# sources.list
deb https://termux.org/packages/ stable main
# science-repo (sources.list.d/science.list)
deb https://dl.bintray.com/grimler/science-packages-24 science stable
# sources.list.d/pointless.list
deb https://its-pointless.github.io/files/24 termux extras
Updatable packages:
All packages up to date
Android version:
9
Kernel build information:
Linux localhost 4.9.112-16982790 #2 SMP PREEMPT Fri Nov 1 17:45:31 KST 2019 aarch64 Android
Device manufacturer:
samsung
Device model:
SM-T720

[ghost]

ECJ version 4.13 and higher seems using Java APIs not available on Android.

Downgraded package is available as ecj version 1:4.12 and is now working fine.

[Harshiv-Patel]

SourceVersion.java doesn't seem to use any external classes other than java.util.xxx , so just including it in the source file from OpenJDK sources would also work, I guess?

[ghost]

@Harshiv-Patel We are not building ECJ from source.