New comment by q66 on void-packages repository

https://github.com/void-linux/void-packages/pull/17759#issuecomment-568788965

Comment:
I think this template could use a better refactor. Also, what are the differences between the C and fpc engine?

Some suggestions:

- only add `fpc` in `hostmakedepends` conditionally instead of sed'ing it away
- don't conditionalize the C engine for `ppc*`, instead use it for everything except `x86_64`, as a single `case`, since `fpc` is only available on x86
- for the cflags removal, conditionalize it with some kind of `$_use_c` variable and set `_use_c=yes` when using the C engine