$NetBSD: patch-Makefile,v 1.1 2015/06/20 19:27:52 ishit Exp $

fix complie error.

--- Makefile.orig	2013-01-09 04:25:03.000000000 +0000
+++ Makefile
@@ -12,7 +12,7 @@ MYCFLAGS = $(patsubst %,-I%/include,$(LI
 MYLDFLAGS = $(patsubst %,-L%/lib,$(LIBPREFIX)) $(OPT) -Wall
 
 THREADS = -lpthread
-LIBADD = $(THREADS) -llzma -larchive
+LIBADD = $(THREADS) -llzma -larchive -lm
 
 CC = gcc
 COMPILE = $(CC) $(MYCFLAGS) $(CFLAGS) -c -o
