mjplusplus is a compiler for the MiniJava language, a Java subset. MiniJava code is compiled to 64 bit x86 assembler. It is being developed by a group of students from Karlsruhe Institute of Technology (Group 5).

The code's documentation can be found here: http://djrieger.github.io/mjplusplus/doc/doxygen/html/

Compile by running make or make release in the mjplusplus directory, this will create an mj++ binary. To obtain a debugging version run make debug instead. It is recommended to use the mj++.sh wrapper, especially if you do not have libfirm in your library path or outside of mjplusplus at all.

Run the compiler like this: ./mj++ [--help|--dumplexgraph|--lextest|--parse|--check|--firm|--assembly] [--print-ast] [--suppress-errors] [--keep] [--compile-firm] [--out] FILE If libfirm is not in your library path you can use the mj++.sh wrapper.

Help options:

• -h --help: Print usage and exit
• -D --dumplexgraph: Print automaton of lexer to the given file name and exit (format: GML)

Run options:

• -l --lextest: Only run the lexer
• -s --parse: Stop after syntax analysis
• -c --check: Stop after semantic analysis
• -g --firm: Stop after generating Firm graphs
• -a --assembly: Stop after generating assembler (default output file: input_without_ending.S)

If none of these options is given, generate an executable (default output file: a.out)

Other options:

• -p --print-ast: After parsing, pretty print the abstract syntax tree
• -q --suppress-errors: Do not print error messages
• -k --keep: Keep the assembly file after compiling
• -f --compile-firm: Generate assembler using the Firm backend instead of our own codegen
• -d --dumpfirmgraph: Output the created firm graphs as vcg-files.
• -o --out FILE: Set the output for various commands to FILE

Example: ./mj++ --out foo foo.mj