install, uninstall and version

modified makefile to be abled to install and uninstall, also installing puts
the correct version in the man page.
All credits go to suckless :^)

hkd.1

@@ -1,4 +1,4 @@
-.TH HKD 1 "JULY 2020" "Alessandro Mauri"
+.TH HKD\-VERSION 1 "JULY 2020" "Alessandro Mauri"
 
 .SH NAME
 hkd \- simple HotKey Daemon

makefile

@@ -1,12 +1,25 @@
 CC = gcc
 CFLAGS = -Wall -Werror -pedantic --std=c99 -O2
+VERSION = 0.1
+PREFIX = /usr/local
+MANPREFIX = ${PREFIX}/share/man
 
-hkd: hkd.o
+hkd: hkd.c
 
 debug:
 	gcc $(CFLAGS) -g hkd.c -o hkd_debug
 
-hkd.o: hkd.c
+install: hkd
+	mkdir -p ${DESTDIR}${PREFIX}/bin
+	cp -f hkd ${DESTDIR}${PREFIX}/bin
+	chmod 755 ${DESTDIR}${PREFIX}/bin/hkd
+	mkdir -p ${DESTDIR}${MANPREFIX}/man1
+	sed "s/VERSION/${VERSION}/g" < hkd.1 > ${DESTDIR}${MANPREFIX}/man1/hkd.1
+	chmod 644 ${DESTDIR}${MANPREFIX}/man1/hkd.1
+
+uninstall:
+	rm -f ${DESTDIR}${PREFIX}/bin/hkd\
+		${DESTDIR}${MANPREFIX}/man1/hkd.1
 
 clean:
-	rm *.o hkd hkd_debug 2> /dev/null
+	rm -f *.o hkd hkd_debug