21.5.16: compile error with --with_msw=yes and --with-dragndrop=no

[Dr. Volker Zell]

Hi

when configuring under cygwin with --with_msw=yes and
--with-dragndrop=no I get the below error:

${srcdir}/configure                                    \
    --pdump                                            \
    --srcdir=${srcdir}                                 \
    --prefix=${prefix}                                 \
    --datadir=${datadir}                               \
    --statedir=${statedir}                             \
    --libdir=${libdir}                                 \
    --infodir=${infodir}                               \
    --mandir=${mandir}                                 \
    --package-path=${prefix}/local/share/xemacs/site-packages:${datadir}/xemacs/site-packages:${datadir}/xemacs/xemacs-packages:${datadir}/xemacs/mule-packages \
    --with-mule                                        \
    --with_msw=yes                                     \
    --with-modules=no                                  \
    --with-widgets=motif                               \
    --with-dragndrop=no

    
/usr/src/xemacs-21.5.16/src/event-msw.c: In function `reinit_vars_of_event_mswindows':
/usr/src/xemacs-21.5.16/src/event-msw.c:5167: error: `dde_eval_pending' undeclared (first use in this function)
/usr/src/xemacs-21.5.16/src/event-msw.c:5167: error: (Each undeclared identifier is reported only once
/usr/src/xemacs-21.5.16/src/event-msw.c:5167: error: for each function it appears in.)
make[1]: *** [event-msw.o] Error 1
make[1]: Leaving directory `/usr/src/xemacs-21.5.16/.build/src'
make: *** [src] Error 2

Any hints ?

Ciao
  Volker