--- Makefile.orig	2013-09-16 12:15:40.000000000 +0800
+++ Makefile	2014-05-15 23:43:23.541980613 +0800
@@ -3,17 +3,9 @@ BSDCONV_PATH?=${PREFIX}
 CFLAGS+=-Wall -DPREFIX='"${PREFIX}"' -DBSDCONV_PATH='"${BSDCONV_PATH}"'
 SHLIBVER=11
 
-UNAME_S=$(shell uname -s)
-ifeq (${UNAME_S}, Darwin)
-SHLIBNAME=libbsdconv.so
-else
 SHLIBNAME=libbsdconv.so.${SHLIBVER}
-endif
 
 LIBS?=
-ifeq (${UNAME_S}, Linux)
-LIBS+=-ldl
-endif
 
 TODO_CODECS_BASIC=
 TODO_CODECS_BASIC+=from/00
@@ -174,12 +166,12 @@ builddir:
 	mkdir -p build/share/bsdconv/to
 
 installdir:
-	mkdir -p ${PREFIX}/bin
-	mkdir -p ${PREFIX}/lib
-	mkdir -p ${PREFIX}/include
-	mkdir -p ${PREFIX}/share/bsdconv/from
-	mkdir -p ${PREFIX}/share/bsdconv/inter
-	mkdir -p ${PREFIX}/share/bsdconv/to
+	mkdir -p ${DESTDIR}${PREFIX}/bin
+	mkdir -p ${DESTDIR}${PREFIX}/lib
+	mkdir -p ${DESTDIR}${PREFIX}/include
+	mkdir -p ${DESTDIR}${PREFIX}/share/bsdconv/from
+	mkdir -p ${DESTDIR}${PREFIX}/share/bsdconv/inter
+	mkdir -p ${DESTDIR}${PREFIX}/share/bsdconv/to
 
 libbsdconv: builddir src/libbsdconv.c src/bsdconv.h
 	$(CC) ${CFLAGS} src/libbsdconv.c -fPIC -shared -o build/lib/${SHLIBNAME} ${LIBS}
@@ -238,41 +230,41 @@ clean:
 install: installdir install_main install_basic install_chinese install_ebcdic
 
 install_main:
-	install -m 555 build/bin/bsdconv ${PREFIX}/bin
-	install -m 555 build/bin/bsdconv-man ${PREFIX}/bin
-	install -m 555 build/bin/bsdconv-mktable ${PREFIX}/bin
-	install -m 555 build/bin/bsdconv-completion ${PREFIX}/bin
-	install -m 444 build/include/bsdconv.h ${PREFIX}/include
-	install -m 444 build/lib/${SHLIBNAME} ${PREFIX}/lib
-	install -m 444 build/share/bsdconv/from/alias ${PREFIX}/share/bsdconv/from/alias
-	install -m 444 build/share/bsdconv/inter/alias ${PREFIX}/share/bsdconv/inter/alias
-	install -m 444 build/share/bsdconv/to/alias ${PREFIX}/share/bsdconv/to/alias
+	install -m 555 build/bin/bsdconv ${DESTDIR}${PREFIX}/bin
+	install -m 555 build/bin/bsdconv-man ${DESTDIR}${PREFIX}/bin
+	install -m 555 build/bin/bsdconv-mktable ${DESTDIR}${PREFIX}/bin
+	install -m 555 build/bin/bsdconv-completion ${DESTDIR}${PREFIX}/bin
+	install -m 444 build/include/bsdconv.h ${DESTDIR}${PREFIX}/include
+	install -m 444 build/lib/${SHLIBNAME} ${DESTDIR}${PREFIX}/lib
+	install -m 444 build/share/bsdconv/from/alias ${DESTDIR}${PREFIX}/share/bsdconv/from/alias
+	install -m 444 build/share/bsdconv/inter/alias ${DESTDIR}${PREFIX}/share/bsdconv/inter/alias
+	install -m 444 build/share/bsdconv/to/alias ${DESTDIR}${PREFIX}/share/bsdconv/to/alias
 	if [ ${SHLIBNAME} != libbsdconv.so ]; then \
-		ln -sf libbsdconv.so.${SHLIBVER} ${PREFIX}/lib/libbsdconv.so ; \
+		ln -sf libbsdconv.so.${SHLIBVER} ${DESTDIR}${PREFIX}/lib/libbsdconv.so ; \
 	fi
 
 install_doc:
-	install -m 555 build/bin/bsdconv-man ${PREFIX}/bin
+	install -m 555 build/bin/bsdconv-man ${DESTDIR}${PREFIX}/bin
 
 install_basic:
 	for item in ${TODO_CODECS_BASIC} ; do \
-		install -m 444 build/share/bsdconv/$${item} ${PREFIX}/share/bsdconv/$${item} ; \
-		if [ -e build/share/bsdconv/$${item}.man ]; then install -m 444 build/share/bsdconv/$${item}.man ${PREFIX}/share/bsdconv/$${item}.man ; fi ; \
-		if [ -e build/share/bsdconv/$${item}.so ]; then install -m 444 build/share/bsdconv/$${item}.so ${PREFIX}/share/bsdconv/$${item}.so ; fi ; \
+		install -m 444 build/share/bsdconv/$${item} ${DESTDIR}${PREFIX}/share/bsdconv/$${item} ; \
+		if [ -e build/share/bsdconv/$${item}.man ]; then install -m 444 build/share/bsdconv/$${item}.man ${DESTDIR}${PREFIX}/share/bsdconv/$${item}.man ; fi ; \
+		if [ -e build/share/bsdconv/$${item}.so ]; then install -m 444 build/share/bsdconv/$${item}.so ${DESTDIR}${PREFIX}/share/bsdconv/$${item}.so ; fi ; \
 	done
 
 install_chinese:
 	for item in ${TODO_CODECS_CHINESE} ; do \
-		install -m 444 build/share/bsdconv/$${item} ${PREFIX}/share/bsdconv/$${item} ; \
-		if [ -e build/share/bsdconv/$${item}.man ]; then install -m 444 build/share/bsdconv/$${item}.man ${PREFIX}/share/bsdconv/$${item}.man ; fi ; \
-		if [ -e build/share/bsdconv/$${item}.so ]; then install -m 444 build/share/bsdconv/$${item}.so ${PREFIX}/share/bsdconv/$${item}.so ; fi ; \
+		install -m 444 build/share/bsdconv/$${item} ${DESTDIR}${PREFIX}/share/bsdconv/$${item} ; \
+		if [ -e build/share/bsdconv/$${item}.man ]; then install -m 444 build/share/bsdconv/$${item}.man ${DESTDIR}${PREFIX}/share/bsdconv/$${item}.man ; fi ; \
+		if [ -e build/share/bsdconv/$${item}.so ]; then install -m 444 build/share/bsdconv/$${item}.so ${DESTDIR}${PREFIX}/share/bsdconv/$${item}.so ; fi ; \
 	done
 
 install_ebcdic:
 	for item in ${TODO_CODECS_EBCDIC} ; do \
-		install -m 444 build/share/bsdconv/$${item} ${PREFIX}/share/bsdconv/$${item} ; \
-		if [ -e build/share/bsdconv/$${item}.man ]; then install -m 444 build/share/bsdconv/$${item}.man ${PREFIX}/share/bsdconv/$${item}.man ; fi ; \
-		if [ -e build/share/bsdconv/$${item}.so ]; then install -m 444 build/share/bsdconv/$${item}.so ${PREFIX}/share/bsdconv/$${item}.so ; fi ; \
+		install -m 444 build/share/bsdconv/$${item} ${DESTDIR}${PREFIX}/share/bsdconv/$${item} ; \
+		if [ -e build/share/bsdconv/$${item}.man ]; then install -m 444 build/share/bsdconv/$${item}.man ${DESTDIR}${PREFIX}/share/bsdconv/$${item}.man ; fi ; \
+		if [ -e build/share/bsdconv/$${item}.so ]; then install -m 444 build/share/bsdconv/$${item}.so ${DESTDIR}${PREFIX}/share/bsdconv/$${item}.so ; fi ; \
 	done
 
 plist: