If a file in your project has properties that differ from the ones set in the project's properties, the file properties take precedence over the project's properties but not over any directives specified in Additional directives that have an IDE equivalent. This might result in receiving unexpected build issues at build time.
To help work around such issues, Enterprise Developer you to convert any directives specified in Additional directives to their project's properties equivalents. With the Check Additional Directives for project properties option checked, when you open a solution Enterprise Developer reviews all directives specified as Additional directives for the projects in the solution. If there are directives that have IDE equivalents, you receive an Update Project Properties dialog box that recommends converting those directives to project's properties.
Specify the maximum number of CPUs to use for parallel compilation. The number is automatically set to the number of CPUs of your computer.
To enable parallel compilation for a native project, check Multi-processor compilation on the COBOL page in the project's properties.