Undefined reference in mfe.cxx

In mfe.cxx line 422:

/mnt/gm26221data/pioneer/packages/midas/lib/libmfe.a(mfe.cxx.o): In function register_equipment()': /mnt/gm26221data/pioneer/packages/midas/src/mfe.cxx:422: undefined reference to equipment_common_overwrite'
collect2: error: ld returned 1 exit status
make: *** [Makefile:175: frontend] Error 1

adding:
// Declare and initialize the equipment_common_overwrite variable BOOL equipment_common_overwrite = TRUE;