You need to apply the patch-for-ctm to src/usr.sbin/ctm, and then do
"make depend && make && make install".

First Patch: Seems to work just fine.
v02: The only difference with the first patch is better diagnostics.
v03: Fixes bugs introduced in v02.

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To do:
1.  Some of the options for CTM are non-operational when svn-ctm's are being
applied.  Currently these just quietly have no effect.  But attempting these
options should trigger an error message.
2.  The error messages when popen fails in ctm_pass?.c should be changed to
match the error messages in ctm.c, and use "warn."

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Other patches:

The patch for mkctm is so you can see how the new svn-ctm's are generated.
To do: the temporary file in DoSvn should be created in the same directory as
the log file.  And mkCTM should be modified to delete any old temporary files.
These files can get as big as 5GB, and could be too big for some file systems.

The patch for ctm_smail has been in effect for some time, and was the result of
one user complaining that his mail system mangled emailed CTM deltas whose line
length was too long.