Bulding latest DMD and associated projects from github master

[Jonathan M Davis]

On Monday, November 19, 2012 02:17:54 Rob T wrote:
> On Monday, 19 November 2012 at 01:06:25 UTC, Alex Rønne Petersen
> 
> wrote:
> > It's a good idea to append "DMD=../dmd/src/dmd" to the druntime
> > and phobos make commands.
> 
> OK but the "why" is much more important than the "how", so can
> you please explain to me why this is a good idea?

So that it uses the dmd that you just built instead of the one in your path. 
If you have separately instealled dmd, then it's to build using the wrong dmd 
unless you explicitly tell it which one use. On my system, dmd is symlinked to 
the one that I built, so the only time that I have to provide DMD= is when 
running dmd's test suite (since it requires it for some reason), but I don't 
run that very often. If you're outright installing it somewhere though, then 
you'll need DMD=path.

- Jonathan M Davis