[GiNaC-list] compile_ex with more than two symbols in the expression

Dear all, Is there a way to use "compile_ex" with more than 2 free variables? I am generating several expressions using .diff() and would like to compile them into C functions and attach function pointers. Using the .subs() method is too slow for my code. Unfortunately my expressions contain more than just two symbolic variables. Ideally I would love to have a FUNCP_nP typedef that can accept a list or array of n symbolic variables and use a compile_ex function that accepts an lst of the symbols. I noticed that the FUNCP_CUBA typedef sort of does this, but I am not sure how to access the compiled function. Any help or pointers would be greatly appreciated! Best, Will S.