devel/imake and clang

[Edgar Fuß <ef%math.uni-bonn.de@localhost>]

On my machine (OS X 10.6.8 with clang 1.7) configuring devel/imake fails,
because this Makefile fragment:
	CPPFLAGS+=		-DRAWCPP=\"${PREFIX}/bin/tradcpp\"
leads to an implicit
	#define RAWCPP \"/usr/pkg/bin/tradcpp\"
with clang.
It helps to change that Makefile line to:
	CPPFLAGS+=		-DRAWCPP='"${PREFIX}/bin/tradcpp"'
but I'm not sure whether that's the right thing to do for all compilers and 
all Versions of auto*.