The GNU “solution”

• Combine the core libraries (GNU Classpath) with GCJ

• GCJ is part of GCC (GNU Compiler Collection)

  • C, C++, Java, Fortran, Ada, ...

• GCJ is a radical traditional compiler for the java language

  • Compile and link .java source files to binaries, .o or .so.
  • Compile and link .class or .jar byte code files to binary.

• Traditional to byte code compiler

  • Compile .java source files to .class byte code (gcj -C).

• Traditional byte code interpreter

  • Interpret .class or .jar byte code files (gij)