Symbol: EXTRAFONT
usr/src/cmd/troff/troff.d/t10.c
126
filebase = setbrk(dev.filesize + 2*EXTRAFONT); /* enough room for whole file */
usr/src/cmd/troff/troff.d/t10.c
147
fontbase[0]->nwfont = EXTRAFONT - dev.nchtab - (128-32) - sizeof (struct Font);