updating Makefile for new source code

Hi:
I've been hacking some updates to the source code and, up to now, the original Makefile has worked for me as long as I was only modifying existing files.
I finally needed to take the plunge, though, and create brand new .c and .h files in their own directories and make is not cooperating.

I have a single new directory, emc2-dev/src/c3pr, containing c3pr.h, c3pr.c, and a Submakefile which looks like this:

I updated the SUBDIRS, HEADERS, and EXTRA_CFLAGS sections in src/Makefile and I'm running it as: "make --debug=v" to see what it's doing.
When I run make, I can see that:
- it does, indeed, invoke c3pr/Submakefile
- it generates src/depends/c3pr/c3pr.d, which looks reasonable
- it copies c3pr.h to emc2-dev/include
- it dies with 'no rule to make target...' as noted in the commented portion of the Submakefile above. Why do other Submakefiles not need to spell out the .c => .o rule?

Also, I do '#include "c3pr.h"' in emc/nml_intf/emc_nml.hh and when make gets that far, this partial listing shows how make gives up:

Considering target file `../tcl/emc.so'.
Considering target file `objects/emc/usr_intf/emcsh.o'.
Pruning file `emc/usr_intf/emcsh.cc'.
Pruning file `emc/usr_intf/emcsh.cc'.
Pruning file `/usr/include/tcl8.5/tcl.h'.
Pruning file `/usr/include/tcl8.5/tclDecls.h'.
Pruning file `/usr/include/tcl8.5/tclPlatDecls.h'.
Pruning file `/usr/include/tcl8.5/tk.h'.
Pruning file `/usr/include/tcl8.5/tkDecls.h'.
Pruning file `libnml/rcs/rcs.hh'.
Pruning file `libnml/nml/nml_type.hh'.
Pruning file `libnml/posemath/posemath.h'.
Pruning file `emc/nml_intf/emc.hh'.
Pruning file `config.h'.
Pruning file `emc/nml_intf/emcglb.h'.
Pruning file `emc/motion/emcmotcfg.h'.
Pruning file `emc/nml_intf/motion_types.h'.
Pruning file `emc/nml_intf/emc_nml.hh'.
Pruning file `emc/nml_intf/emc.hh'.
Pruning file `libnml/nml/cmd_msg.hh'.
Pruning file `libnml/nml/nml.hh'.
Pruning file `libnml/cms/cms_user.hh'.
Pruning file `libnml/nml/nml_type.hh'.
Pruning file `libnml/nml/nmlmsg.hh'.
Pruning file `libnml/nml/stat_msg.hh'.
Pruning file `emc/nml_intf/emcpos.h'.
Pruning file `emc/nml_intf/canon.hh'.
Pruning file `emc/nml_intf/emctool.h'.
Pruning file `emc/rs274ngc/rs274ngc.hh'.
Pruning file `emc/nml_intf/canon.hh'.
Pruning file `c3pr.h'.
Finished prerequisites of target file `objects/emc/usr_intf/emcsh.o'.
Giving up on target file `objects/emc/usr_intf/emcsh.o'.

I assume the problem is that the 'pruning c3pr' line ought to include a path to it, but I cannot figure out how to supply it without spelling it out in the #include line itself. Again, no other #include lines seem to need to do so.

Can anyone shed some light on this for me?
Thanks,
Reid

I did:
make depclean
and I am back to tracking down 'real' problems.

Man, oh man, that Makefile is a piece of work!

Thanks,
Reid