import problems

[John Colvin via D.gnu]

On Tuesday, 13 October 2015 at 10:09:03 UTC, John Colvin wrote:
> Where does the information

sorry, pressed enter by accident.

What is the process by which gdc knows what the default import 
path for object.d is?

Alternatively, what do I have to change to choose my own location 
for gdc to install its imports to and have it automatically use 
that as an import path? I have seen 
https://github.com/Dicebot/Arch-PKGBUILDs/blob/master/gdc/folders.diff and followed that example, but of course changing configure.ac is a pain because then you have to have exactly the right version of autoconf to update configure. Also, I couldn't find the relevant lines to change in gcc/d/Make-lang.in

Currently I tried changing gdc_include_dir in the generated 
configure, which gets everything installed in the right place, 
but gdc doesn't import it (and doesn't show any import paths in 
the error message)