[Scons-users] Extracting "-I" paths in a complex tree

[andreas.ames at de.transport.bombardier.com]

> I agree, that would be perfect.  I don't know of any such 

> implementation though.

> 

> That said, Scanners are more-or-less pluggable, so if you wrote one

> you could pretty easily plug it in.


I've actually thought about that but I'm stuck with two doubts because of 
my lack of knowledge about SCons internals.  Maybe you (or someone else) 
can help me with this:

1. AFAIK, source scanners are executed *before* the actual build.  In case 
of using compiler outputs for dependency generation this is not possible. 
OTOH, implementing this as a target scanner wouldn't be desirable in this 
case because in my understanding this requires a complete rebuild after 
the initial build as all implicit dependencies will be new on the second 
build.  So, do you know of a simple possibility to 'postpone' the 
execution of a source scanner to combine it with the actual build?

2. To implement such a scanner the output of the compiler must be 
filtered; in the case of gcc it's the stderr that is relevant.  Is there 
any hook available in SCons to filter the build command's output?


TIA,

aa
 
  
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