Falling to build

[John]

This morning all OK in building on openSuSe x86_64 until this happens

  CC       xfns.o
xfns.c: In function ‘Fx_display_monitor_attributes_list’:
xfns.c:5072:30: warning: implicit declaration of function 
‘x_get_net_workarea’; did you mean ‘x_set_undecorated’? 
[-Wimplicit-function-declaration]
  if (i == primary_monitor && x_get_net_workarea (dpyinfo, &workarea_r))
                              ^~~~~~~~~~~~~~~~~~
                              x_set_undecorated
xfns.c:5072:30: warning: nested extern declaration of ‘x_get_net_workarea’ 
[-Wnested-externs]
make -C ../admin/charsets all
make[2]: Entering directory '/home/jpff/GNU/emacs/admin/charsets'
make[2]: Nothing to be done for 'all'.
make[2]: Leaving directory '/home/jpff/GNU/emacs/admin/charsets'
make -C ../admin/unidata charscript.el
make[2]: Entering directory '/home/jpff/GNU/emacs/admin/unidata'
make[2]: Nothing to be done for 'charscript.el'.
make[2]: Leaving directory '/home/jpff/GNU/emacs/admin/unidata'
  CCLD     temacs
/usr/lib64/gcc/x86_64-suse-linux/7/../../../../x86_64-suse-linux/bin/ld: 
xfns.o: in function `Fx_display_monitor_attributes_list':
/home/jpff/GNU/emacs/src/xfns.c:5072: undefined reference to 
`x_get_net_workarea'
collect2: error: ld returned 1 exit status
make[1]: *** [Makefile:651: temacs] Error 1

Should I try a make bootstrap or what?
==John ffitch