Working around gcc6-aux dependency on Linux

[Mayuresh <mayuresh%acm.org@localhost>]

I am trying to build cad/ghdl on Void Linux, as the binary distribution's
package has some issues on Void.

This leads to dependencies gcc10-aux -> gcc6-aux. The latter is not
available for Linux.

I am sure, may Linux-pkgsrc users would have faced such situation. What is
a typical workaround for this?

-- 
Mayuresh