Systems and methods for generating a macro substitution command to substitute a single function for a given symbolic name are described. An example method may include a processor analyzing a plurality of build configuration files that describe parameters for building a plurality of source code files. The processor determines whether a single function is declared in the plurality of build configuration files for a given symbolic name. The processor, upon determining that a single function is declared, generates a macro substitution command to substitute an identifier of the single function for the given symbolic name.