Re: Generating new -I's for makedepend

[Dan Kegel <dank at kegel dot com>]

Alex Bennee wrote:
> I'm trying to clean up some cross-compiles on my system that use
> makedepend to generate makefile dependencies. The problem with make
> depend is that it assumes the system include directories are in the
> usual place which of course they are not for cross-compiling.
>
> I thought I could do a hack using gcc's -print-search-dirs but that
> wasn't quite what I wanted. Is there another way or some obscure command
> line parameter I've missed?

You might be able to use something whacky like

$(CDEPEND): $(LOCAL_ARCH_DIR)/%.d: %.c
        $(CC) $(CFLAGS) $< -MM -MG | sed -e 's,^[^:]*:,$@.o $@: ,g' -e 's,\.d\.o,.o,' > $@
-include $(CDEPEND)

The gnu make mailing list archives probably are full of examples of
use of the -MM option.  It's a bit tricky to use, but I think both
Automake and SCons use it (not sure).  If SCons doesn't, it'd be interesting
to see what it does do; maybe it's got its own parser.
- Dan

--
Dan Kegel
http://www.kegel.com
http://counter.li.org/cgi-bin/runscript/display-person.cgi?user=78045


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