using subdirectories and $BDIR with :rule

Hi,

I am just trying to get an initial demo build working using aap, but I
am having trouble getting the path handling straight in my head.  In
particular I think the 'correct' usage of BDIR is my problem.

Basically I am generating source files from idl, the idl compiler
generates 4 files, the client and server side stubs.  My test aap recipe
is:

INCLUDE+=-Iutil

:program $(BDIR)/p1 : src/one.cpp $(BDIR)/src/util/blahS.cpp

:rule {sourceexists} %S.cpp %.hh %C.cpp %S.hh : %.idl
      :cat $source >! $(BDIR)/$(match)S.cpp 
      :cat $source >! $(BDIR)/$(match)C.cpp 
      :cat $source >! $(BDIR)/$(match).hh 
      :cat $source >! $(BDIR)/$(match)S.hh 


The problem with the above is that the output files are getting put
directly in $BDIR, $match does seem to include the path component. I
figure I can parse the $source to extract the path component and use
that in the output, but it does not seem right.


Am I doing something silly?  I really did not expect to have to put
$BDIR in so many places, but when it was not there the generated stuff
and the program itself got put in the current directory.

Thanks
m@





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