LibreOffice compilation stop building at ridljar

The build was stop at ridljar module. And the compiler complaining that SSOExceptions.idl was missing. Why this happen? According to the fellow developers, this could happen when the source code is downloaded without making a clean build. In other words, to solve this problem, a clean build is a must whenever the source code were first check out.

Notice that the console output showing javac compile error, invalid jdk 1.7? That one must be solve by issuing following command before build.

Full stack trace of the build