Output file argument not working about oberon-lang

[zaskar9]

I think I never fully introduced that option. At some point, I want to make the command-line interface of oberon-lang as close to clang and gcc (but not msvc 😎) as possible. As part of this change, I'm planning to retire the --filetype option and achieve the same by supporting the following options.

• option -c (compile) will output an object file (*.o or *.obj)
• option -S (assembly) will output an assembly file (*.s)
• option -r (run) will jit and run the input module
• no option will compile and link the file

Option -o will override the default name of the output file and, additionally, --emit-llvm will write a *.bc file in compile mode and a *.ll file in assembly mode.

Thus far the plan. Apart from introducing some of these options, I never implemented this functionality as the compiler currently does not support the full pipeline (including linking). Your fix seems fine for the time being!

[tenko]

Change implemented in pull request #19