I have this hierarchy on my project:<div><br></div><div>��/</div><div>�� �projectA/</div><div>�� � �build/</div><div>�� � � �<i>jamfile</i></div><div>�� � �win/</div><div>�� � � �<i>a.ccp</i></div><div>�� � �mac/</div><div> �� � � �<i>a.cpp</i></div><div>�� � �<i>some.cpp</i></div><div><i><br></i></div><div>�� �projectB/</div><div>�� � �build/</div><div>�� � � �<i>jamfile</i></div><div>�� � �win/</div><div>�� � � �<i>b.cpp</i></div><div>�� � �mac/</div> <div>�� � � �<i>b.cpp</i></div><div>�� � �<i>some.cpp</i></div><div><i><br></i></div><div>�� �<i>jamroot</i></div><div><br></div><div>I'd like to know, how to write a rule in my <i>jamroot</i> that gets the right specific platform sources ? And I <b>don't</b> want to call this rule in every <i>jamfile</i>.</div> <div><br></div><div>Thank you.</div>