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General Description: When analyzing/compiling the get_models-extracted COREGEN Verilog behavioral models, the following warning is issued:
"WARNING[xx]: .../XilinxCoreLib/xxxx.v(xx): Redefinition of macro: true."
Similar warnings against the macros named TRUE, false, and FALSE
The simulator's analyzer is complaining that the Verilog macros "true", "TRUE", "false", and "FALSE" are multply defined in these models. The warning is seen when several Verilog models which have defined the same macro individually are analyzed together through the use of wildcards, using the same analyze command.
The warnings can be ignored since the macro definition in each model consistently sets the macro of the same name to the same value in all the models--that is, "TRUE" and "true" are always set to a value of "1", and "FALSE" and "false" are always set to "0" in all the models that define them. As a result, the redefinition effectively does not change the macro value, so it does not adversely affect the functionality of the models.
To avoid these warnings, you may restrict yourself to referencing one model per analyze command.