@Override
	public String getExecutableFormat() {
		String format = null;
		try {
			Options pl = getOptions(PROGRAM_INFO);
			format = pl.getString(EXECUTABLE_FORMAT, (String) null);
		}
		catch (Exception e) {
			// handled below
		}
		return format == null ? UNKNOWN : format;
	}
Initialize program compiler specification.
During a language upgrade this will provide a temporary spec until setLanguage is complete.
@throws CompilerSpecNotFoundException if the compiler spec cannot be found
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/database/ProgramDB.java