Embedding tag name in files

I use the following behaviour with CVS, and was wondering how I can
achieve it with subversion.

With CVS, I embed $Name$ in the source somewhere, e.g. as

static char *version = "$Name";

Now when I release the code, I tag the repository

cvs rtag VX_Y project

Then when I do 'cvs export -r VX_Y project' to get the source tree from
which the tarball is created, the $Name$ string is replaced by VX_Y.
Inside the program, I can process this to report the program version to
service the --version switch etc.

I can't see an obvious way to do the equivalent in subversion. How do
people embed released s/w versions inside the program source? (Other
than the obvious hand editing a file, committing that then forking the
tagged version of the trunk - I'd like to avoid this kind of thing.)

Cheers

-- 
Richard P. Curnow | Free software fundamentalist
Weston-super-Mare | 
United Kingdom    | http://www.rc0.org.uk/
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