(Slightly OT) including svn revision in config.h

[Jim Lynch]

I'd really like to be able to include the svn revision number somewhere 
I can reference it from my program so I know which source revision is 
running on a specific binary, in case I don't record that somewhere.  
Before I moved to the gnu configuration setup I had a target in my 
makefile that changed a header slightly and did a svn ci.  The header 
included the $id$ tag that svn populated with versioning info. 

Two problems with that, if I did an svn ci rather than the make svnci, 
the file didn't get updated.  The other problem is I haven't figured out 
how to add another target and associated code to the Makefile.am. 

Does anyone have a suggestion as to how I can automatically keep the svn 
revision number in a config file somewhere?

Thanks.
Jim.