Design library contents

A design library is a directory that serves as a repository for compiled design units. The design units contained in a design library consist of VHDL entities, packages, architectures, and configurations; and Verilog modules and UDPs (user defined primitives). The design units are classified as follows:

• Primary design units
  Consist of entities, package declarations, configuration declarations, modules, and UDPs. Primary design units within a given library must have unique names.
• Secondary design units
  Consist of architecture bodies and package bodies. Secondary design units are associated with a primary design unit. Architectures by the same name can exist if they are associated with different entities.

Design unit information

The information stored for each design unit in a design library is:

• retargetable, executable code
• debugging information
• dependency information

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