Build dependency on cctools?

[Lawrence Velázquez]

I'm currently writing a portfile for re-alpine. I have cctools installed, so re-alpine's configure script picks up cctools' nm and ar, and its build process calls cctools' ar and ranlib.

Is it advisable in this case to declare a build dependency (probably a bin-style one) on cctools? I wouldn't think twice about doing so, except that I can't find any other ports that bother to do this.

vq