Question

Suppose I have a top level file that I pass to my compiler that has:

`include "my_defines.sv"
`include "my_component.sv"

Inside “my_component.sv” file, I am using some defines from “my_defines.sv”, like this:

my_variable = `CONSTANT_FROM_MY_DEFINES;

The question is the following: do I need to have `include "my_defines.sv" inside “my_component.sv”? Perhaps this requirement is compiler-specific?

Answer 1

It is dependent upon the order in which your source files are compiled. Because you are referring specifically todefine macros, which are global, it is required that the macro definitions are compiled before the macro is used. In your case, you do not need to include “my_defines.sv” inside “my_component.sv” since “my_defines.sv” was already compiled in your top file.