Missing dependencies in building-LDC instructions

[Joakim via digitalmars-d-ldc]

On Thursday, 22 October 2015 at 23:12:03 UTC, Joseph Rushton 
Wakeling wrote:
> The wiki page description of how to build LDC:
> http://wiki.dlang.org/Building_LDC_from_source
>
> ... seems to be missing a couple of dependencies, namely zlib 
> and libedit (required for -lz and -ledit).  The LLVM version 
> constraints are also probably a little outdated.
>
> Happy to tweak the page myself at some point, but thought I'd 
> raise it here first in case someone wants to offer some input.

zlib comes with phobos, so it isn't listed, as that list only 
consists of external dependencies.  I don't know about libedit, 
where is it actually used?