--- Makefile.orig	2020-11-07 11:15:40 UTC
+++ Makefile
@@ -1,22 +1,14 @@
 #	@(#)Makefile	8.1 (Berkeley) 6/6/93
 # $FreeBSD: head/usr.bin/calendar/Makefile 367051 2020-10-26 03:26:18Z imp $
 
-.include <src.opts.mk>
-
 PROG=	calendar
-SRCS=	calendar.c locale.c events.c dates.c parsedata.c io.c day.c \
-	ostern.c paskha.c pom.c sunpos.c
-LIBADD=	m util
 
-.if ${MK_ICONV} == "yes"
-CFLAGS+=	-DWITH_ICONV
-.endif
+OBJS=	calendar.o locale.o events.o dates.o parsedata.o io.o day.o \
+	ostern.o paskha.o pom.o sunpos.o
 
-FILESGROUPS+=	CALS
-CALS=	calendars/calendar.freebsd
-CALSDIR=	${SHAREDIR}/calendar
+LDFLAGS=	-lm -lutil
 
-HAS_TESTS=
-SUBDIR.${MK_TESTS}+= tests
+all:		${PROG}
 
-.include <bsd.prog.mk>
+${PROG}:	${OBJS}
+		${CC} ${OBJS} ${LDFLAGS} -o ${PROG}