Legacy Document

Important: The information in this document is obsolete and should not be used for new development.

Inside Macintosh: Mac OS Runtime Architectures /: Chapter 3 - Programming for the CFM-Based Runtime Architecture / Import Library Techniques

Use No Version Numbers and No Weak Symbols
Choosing not to use any version numbers or weak symbols when developing import libraries provides rudimentary compatibility checking with no effort on the developer's part. That is, if a required symbol is not found, then the program preparation fails.

Note
Choosing no version numbers means that all three version numbers are set to zero.