I don't know what others think of this, but I find the following
construction ugly and somewhat tedious to edit: 

CONFIGURE_ARGS+=	--something \
			--something-else \
			--and-also-this

I much prefer this: 

CONFIGURE_ARGS+=	--something
CONFIGURE_ARGS+=	--something-else
CONFIGURE_ARGS+=	--and-also-this

Although the former is very often seen in pkgsrc (also with MASTER_SITES
and other variables).  Is there a pkgsrc policy preferring either one over
the other?  If so, could a pkglint check be written for this, suggesting
the use of += instead of escaping newlines?  

	Geert