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I've built ddd from ddd-3.3.9.tar.gz, and had a couple of problems. I
had to add "#include <stdio.h>" in stdclass.C. And for execution had to
"cp -r vsllib ddd" while in directory ddd-3.3.9. This appears to have
some of the same problems as the gentoo build, but at least it only took
one <cntrl-c> to track down one bug in my code. The hour glass is
always visible when the mouse in the the source file however. My CPU
monitor does not indicate any cost associated with this. I could also
note that the configure needed the option
"--enable-builtin-app-defaults" for successful execution.