Ugh, I forgot Ghostscript probably gets built for the SDK. (We're not pulling it into the base image yet. But we might soon.) Unfortunately ghostscript doesn't build well in parallel for some people, so Gentoo disabled parallel build, plus it runs some really slow hand-rolled tools instead of basic tools like 'echo'... all in all, it's really ugly. But I'm debugging it right now, since an 8 minute build time seems completely unacceptable.

Anyway, we shouldn't pull in Ghostscript for the SDK (ideadtea pulls in CUPS for stupid reasons, but it doesn't actually need GS...). I'll upload a CL very shortly.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromiumos/overlays/chromiumos-overlay/+/5e5da7a58e847b0233d8b03e08f3dd740b05bc36

commit 5e5da7a58e847b0233d8b03e08f3dd740b05bc36
Author: Brian Norris <briannorris@chromium.org>
Date: Thu Jun 16 02:34:55 2016

sdk: don't pull in ghostscript

We're pulling CUPS into the SDK (b/c icedtea is silly...). But that
doesn't mean we need to pull in Ghostscript too; plus, Ghostscript
currently builds really slow, since it isn't using parallel make at the
moment.

Use the new USE=postscript flag to disable ghostscript-based filters and
remove the dependency.

BUG= chromium:620545 
TEST=trybots

Change-Id: Iae54dc4b786877f175cf1a806fb496d206d2cb33
Signed-off-by: Brian Norris <briannorris@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/353190
Reviewed-by: Aviv Keshet <akeshet@chromium.org>

[modify] https://crrev.com/5e5da7a58e847b0233d8b03e08f3dd740b05bc36/profiles/targets/sdk/package.use

I verified we're no longer pulling in ghostscript for the SDK, and that the emerge was taking around 8 to 10 minutes sometimes (yikes!). Should be fixed.

Feel free to reopen and/or reassign if there are other slowness issues to investigate.

Closing... please feel free to reopen if its not fixed.