gEDA: Building PCB barfs, but now in a different place

[sdb-at-NOSPAMcloud9_dot_net (Stuart Brorson)]

DJ, Dan, Harry --

I nuked my old PCB source dir, and re-downloaded the latest stuff from
SourceForge CVS.  I did the folowing: 

sh autogen.sh --prefix=/usr/local/geda
make

Now I make it by the old .dep problem where the build died, but I have
a new error while building the docs:

cd "$am__cwd"; \
if /bin/sh /usr/local/src/pcb/missing --run makeinfo   -I . \
 -o pcb.info pcb.texi; \
then \
  rc=0; \
  cd .; \
else \
  rc=$?; \
  cd . && \
  $restore $backupdir/* `echo "./pcb.info" | sed 's|[^/]*$||'`; \
fi; \
rm -rf $backupdir; \
exit $rc
pcb.texi:4240: @image file `pad.txt' (for text) unreadable: No such
file or directory.
makeinfo: Removing output file `pcb.info' due to errors; use --force
to preserve.
make[3]: *** [pcb.info] Error 1
make[3]: Leaving directory `/usr/local/src/pcb/doc'


A quick glance around revealed that pad.txt was indeed not present,
and it is not built anywhere either.  

Any ideas?  Maybe it's a ghost of a former version which needs to be
banished using yet another old-build-target exorcism?

Stuart