[pkgsrc/trunk]: pkgsrc/lang/ghc7 Add comments

[pho <pho%pkgsrc.org@localhost>]

details:   https://anonhg.NetBSD.org/pkgsrc/rev/28d970a91407
branches:  trunk
changeset: 646163:28d970a91407
user:      pho <pho%pkgsrc.org@localhost>
date:      Thu Feb 05 00:38:14 2015 +0000

description:
Add comments

diffstat:

 lang/ghc7/bootstrap.mk |  4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)

diffs (18 lines):

diff -r 108a2e74a337 -r 28d970a91407 lang/ghc7/bootstrap.mk
--- a/lang/ghc7/bootstrap.mk    Thu Feb 05 00:26:34 2015 +0000
+++ b/lang/ghc7/bootstrap.mk    Thu Feb 05 00:38:14 2015 +0000
@@ -1,4 +1,4 @@
-# $NetBSD: bootstrap.mk,v 1.14 2015/02/05 00:26:34 pho Exp $
+# $NetBSD: bootstrap.mk,v 1.15 2015/02/05 00:38:14 pho Exp $
 # -----------------------------------------------------------------------------
 # Select a bindist of bootstrapping compiler based on a per-platform
 # basis.
@@ -98,6 +98,8 @@
 .  endif
 CHECK_BUILTIN.${pkg}:= no
 
+# BOOT_GHC_PKGSRC_DEPS is a list of packages whose pkgsrc version is
+# preferred over native one, either by user or ../../mk/platform
 .  if ${PREFER.${pkg}} == "pkgsrc"
 BOOT_GHC_PKGSRC_DEPS+= ${pkg}
 .  endif