Liferay Builds with the ECJ Compiler(Tricks for linux).

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Task cannot continue because ECJ is not installed.
ECJ was automatically installed. Please rerun your task.

I suffer for above issue. Finally resolve this in ubuntu.

I don't use Eclipse IDE environment, Ubuntu provides ecj compiler separately:

Step 1: sudo apt-get install ecj

Step 2: If you using ant of Ubuntu (sudo apt-get install ant)
You need to link ecj.jar to its directory(If ecj.jar already in /usr/share/ant/lib/ecj.jar then first remove this):
sudo ln -s /usr/share/java/ecj.jar /usr/share/ant/lib/ecj.jar
 

Enjoy...

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