The latter can't be found anywhere in source or system headers.
NEXTLFLAGS = -lsys_s
NEXTMASTER = GLOBALCFLAGS="$(NEXTCFLAGS)" GLOBALLFLAGS="$(NEXTLFLAGS)"
-LINUXCFLAGS = -g -Wall -W -Wno-unused -Dlint -D__USE_BSD -D__USE_BSD_SIGNAL -DLISTENMAXCONN=5 -DRel4
+LINUXCFLAGS = -g -Wall -W -Wno-unused -D__USE_BSD -DLISTENMAXCONN=5 -DRel4
LINUXLFLAGS =
LINUXMASTER = GLOBALCFLAGS="$(LINUXCFLAGS)" GLOBALLFLAGS="$(LINUXLFLAGS)" CLIENTLIBS=-lncurses
-LINUXPTHCFLAGS = -g -Wall -W -Wno-unused -Dlint -D_EMPTH_POSIX=1 -U_EMPTH_LWP -D__USE_BSD -D__USE_BSD_SIGNAL -DLISTENMAXCONN=5 -DRel4
+LINUXPTHCFLAGS = -g -Wall -W -Wno-unused -D_EMPTH_POSIX=1 -U_EMPTH_LWP -D__USE_BSD -DLISTENMAXCONN=5 -DRel4
LINUXPTHLFLAGS = -lpthread
LINUXPTHMASTER = GLOBALCFLAGS="$(LINUXPTHCFLAGS)" GLOBALLFLAGS="$(LINUXPTHLFLAGS)" CLIENTLIBS=-lncurses