makefile: add a Makefile for installing/uninstalling system wide.

Makefile

@@ -0,0 +1,23 @@
+# potcasse – podcast self hosting made easy
+# See the LICENSE file for copyright and license details.
+.POSIX:
+
+VERSION = 0.1
+
+BIN    = potcasse
+PREFIX = /usr
+BINDIR = ${PREFIX}/bin
+
+all:
+
+install: 
+	@echo installing executable to "${DESTDIR}${PREFIX}/bin"
+	@mkdir -p "${DESTDIR}${BINDIR}"
+	@cp -f "${BIN}" "${DESTDIR}${BINDIR}/${BIN}"
+	@chmod 555 "${DESTDIR}${BINDIR}/${BIN}"
+
+uninstall:
+	@echo removing executable file from "${DESTDIR}${PREFIX}/bin"
+	@rm -f "${DESTDIR}${BINDIR}/${BIN}"
+
+.PHONY: all install uninstall clean