Hangs on windows after "include"

[Cesar Crusius]

Here's the problem: In some point at our Makefile infastructure we have

-include $(deps)

and the usual dependency make rule

$(objdir)/%.d: $(root)/$(srcdir)/%.cpp
        @$(make-dir)
        @rm -f $@
        $(make-dep)

Here's the problem: on Windows (and on Windows only), in some cases make hangs 
after the last dependency is generated. The exact point of hanging I don't 
know, but the CPU is idle after that and make sits there doing nothing 
(running 3.80 here). Interrupting the build and starting again (with 
dependencies already generated) results in no more hangs, so I assume it has 
to do with the interplay of dependency making and the include statement. Any 
clues?

For reference, $(make-dep) expands to

make-dep = $(SHELL) -ec \
'makedepend $(includes) -o$(objext) -f- $< 2>/dev/null | \
sed '\''s%^.*:%$(@:%.d=%$(objext)) $@: %g'\'' > $@'

for Windows builds, which runs unxutils (http://unxutils.sourceforge.net/).

Any help would be appreciated.

- Cesar