Add PREFIX and DESTDIR to Makefile

Makefile

@@ -6,6 +6,7 @@ NAME = pacaur
 VERSION = 4.7.10
 PREFIX ?= /usr/local
 
+
 # default target
 all: doc
 
@@ -18,13 +19,13 @@ doc:
 #install pacaur
 install:
 	@echo "Install $(NAME)..."
-	@install -D -m644 ./config "/etc/xdg/pacaur/config"
-	@install -D -m755 ./pacaur "/usr/bin/$(NAME)"
-	@install -D -m644 ./bash.completion "/usr/share/bash-completion/completions/$(NAME)"
-	@install -D -m644 ./zsh.completion "/usr/share/zsh/site-functions/_pacaur"
-	@install -D -m644 ./pacaur.8 "/usr/share/man/man8/pacaur.8"
-	@install -D -m644 ./LICENSE "/usr/share/licenses/pacaur/LICENSE"
+	@install -D -m644 ./config "$(DESTDIR)/etc/xdg/pacaur/config"
+	@install -D -m755 ./pacaur "$(DESTDIR)$(PREFIX)/bin/$(NAME)"
+	@install -D -m644 ./bash.completion "$(DESTDIR)$(PREFIX)/share/bash-completion/completions/$(NAME)"
+	@install -D -m644 ./zsh.completion "$(DESTDIR)$(PREFIX)/share/zsh/site-functions/_pacaur"
+	@install -D -m644 ./pacaur.8 "$(DESTDIR)$(PREFIX)/share/man/man8/pacaur.8"
+	@install -D -m644 ./LICENSE "$(DESTDIR)$(PREFIX)/share/licenses/pacaur/LICENSE"
 	@for i in {ca,da,de,es,fi,fr,hu,it,ja,nb,nl,pl,pt,ru,sk,sl,sr,sr@latin,tr,zh_CN}; do \
-		mkdir -p "/usr/share/locale/$$i/LC_MESSAGES/"; \
-		msgfmt ./po/$$i.po -o "/usr/share/locale/$$i/LC_MESSAGES/pacaur.mo"; \
+		mkdir -p "$(DESTDIR)$(PREFIX)/share/locale/$$i/LC_MESSAGES/"; \
+		msgfmt ./po/$$i.po -o "$(DESTDIR)$(PREFIX)/share/locale/$$i/LC_MESSAGES/pacaur.mo"; \
 	done