Use 'rm -f' for make clean.

mk/hdr.mk

@@ -63,10 +63,10 @@ all:
 	rm -f ${MAN}/man1/$<
 
 .O.clean:
-	rm $< || true 2>/dev/null
-	rm $*.o || true 2>/dev/null
+	rm -f $< || true 2>/dev/null
+	rm -f $*.o || true 2>/dev/null
 .o.clean:
-	rm $< || true 2>/dev/null
+	rm -f $< || true 2>/dev/null
 
 printinstall:
 mkdirs:

mk/lib.mk

@@ -10,7 +10,7 @@ depend: ${OBJ:=.depend}
 
 libclean:
 	for i in ${LIB} ${OFILES}; do \
-		rm $$i; \
+		rm -f $$i; \
 	done 2>/dev/null || true
 
 printinstall:

mk/many.mk

@@ -12,7 +12,7 @@ printinstall:
 
 manyclean:
 	for i in ${TARG:=.o} ${TARG:=.O} ${OFILES}; do \
-		rm $$i; \
+		rm -f $$i; \
 	done 2>/dev/null || true
 
 include ${ROOT}/mk/common.mk

mk/one.mk

@@ -14,7 +14,7 @@ printinstall:
 
 oneclean:
 	for i in ${PROG} ${OFILES}; do \
-		rm $$i; \
+		rm -f $$i; \
 	done 2>/dev/null || true
 
 ${OFILES}: ${HFILES}