• include_regular_expression: Set the regular expression used for dependency checking.
      include_regular_expression(regex_match [regex_complain])

    Set the regular expressions used in dependency checking. Only files matching regex_match will be traced as dependencies. Only files matching regex_complain will generate warnings if they cannot be found (standard header paths are not searched). The defaults are:

      regex_match    = "^.*$" (match everything)
    regex_complain = "^$" (match empty string only)