DDD build error message using Lesstif V2/Rev 0.89.9

[Andrew Patrzalek]

In trying to build DDD V3.2.1 using Lesstif V2 Rev. 0.89.9 the following
error was returned:

SpinBox.o: In function `CreateSpinBox(_WidgetRec *, char *, Arg *,
unsigned int)':
/ddd-3.2.1/ddd/SpinBox.C:184: undefined reference to `XmCreateSpinBox'
SourceView.o: In function
`SourceView::update_properties_panel(BreakpointPropertiesInfo *)':
/ddd-3.2.1/ddd/SourceView.C:5787: undefined reference to
`xmSpinBoxWidgetClass'
collect2: ld returned 1 exit status
make[1]: *** [ddd-3.2.1-i486-pc-linux-gnu] Error 1
make: *** [all] Error 1

I have the generic Lesstif install but cannot find the referenced code
for
XmCreateSpinBox or xmSpinBoxWidgetClass.

I am obviously missing something.  If what I perceive is happening, how
do I locate the needed sources.

Thanks