#line directive and -D option

[Hiroki Kaminaga]

From: Jan Engelhardt <jengelh@medozas.de>
...
> >If you don't want the prefix, don't append the prefix.
> 
> Well sometimes that just is not possible; for example when
> you do an out-of-srcdir build in an autotools project, aka:
> 
> 	mkdir obj
> 	cd obj
> 	../configure
> 
> then the compiler will be invoked with lots of ../${filename}.c.
> That's why I use basename.

Some part of prefix is needed if there is a same filename in different
direcotry, so I wanted to strip top N prefix, not all dirname. However,
I think this is more of a build environment issue, and if there were any
convenient gcc functionlarity, I wanted to use it.


Best Regards,
(Hiroki Kaminaga)
t
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