Updated Makefile for use DESTDIR, PREFIX and SYSCONFDIR

And adapted debian packaging.

Makefile

@@ -8,6 +8,19 @@ JOBS:=$(shell nproc)
 # stalls the parallelist waiting to compile the Pre Compiled Headers.
 CMAKE_EXTRA_ARGS := -DCMAKE_CXX_COMPILER=${CXX} -DENABLE_PCH=OFF
 
+# the final directory after proper install of normal files
+ifeq ($(PREFIX),)
+    PREFIX := /usr/local
+endif
+# the final directory after proper install of configuration files
+ifeq ($(SYSCONFDIR),)
+    SYSCONFDIR := /usr/local/etc
+endif
+# the intermediate directory needed by the package manager
+ifeq ($(DESTDIR),)
+    DESTDIR := ""
+endif
+
 
 .PHONY: help
 help:
@@ -121,45 +134,42 @@ deb:
 
 	dpkg-buildpackage --no-sign
 
-ifneq ($(DESTDIR),)
-    PREFIX := $(DESTDIR)
-endif
-ifeq ($(PREFIX),)
-    PREFIX := /usr/local
-endif
 .PHONY: install
 
 install: install-rtpmidid install-librtpmidid0 install-librtpmidid0-dev
 
+USR=$(DESTDIR)$(PREFIX)
+ETC=$(DESTDIR)$(SYSCONFDIR)
+
 install-rtpmidid: build man
-	mkdir -p $(PREFIX)/bin/
-	cp build/src/rtpmidid $(PREFIX)/bin/
+	mkdir -p $(USR)/bin/
+	cp build/src/rtpmidid $(USR)/bin/
 	cd cli && make compile
-	cp build/rtpmidid-cli $(PREFIX)/bin/rtpmidid-cli
-	mkdir -p $(PREFIX)/etc/systemd/system/
-	cp debian/rtpmidid.service $(PREFIX)/etc/systemd/system/
-	mkdir -p $(PREFIX)/etc/rtpmidid/
-	cp default.ini $(PREFIX)/etc/rtpmidid/
-	mkdir -p $(PREFIX)/share/doc/rtpmidid/
-	cp README.md $(PREFIX)/share/doc/rtpmidid/
-	cp LICENSE-daemon.txt $(PREFIX)/share/doc/rtpmidid/LICENSE.txt
-	mkdir -p $(PREFIX)/share/man/man1/
-	cp build/man/rtpmidid.1 $(PREFIX)/share/man/man1/
-	cp build/man/rtpmidid-cli.1 $(PREFIX)/share/man/man1/
+	cp build/rtpmidid-cli $(USR)/bin/rtpmidid-cli
+	mkdir -p $(ETC)/systemd/system/
+	cp debian/rtpmidid.service $(ETC)/systemd/system/
+	mkdir -p $(ETC)/rtpmidid/
+	cp default.ini $(ETC)/rtpmidid/
+	mkdir -p $(USR)/share/doc/rtpmidid/
+	cp README.md $(USR)/share/doc/rtpmidid/
+	cp LICENSE-daemon.txt $(USR)/share/doc/rtpmidid/LICENSE.txt
+	mkdir -p $(USR)/share/man/man1/
+	cp build/man/rtpmidid.1 $(USR)/share/man/man1/
+	cp build/man/rtpmidid-cli.1 $(USR)/share/man/man1/
 
 install-librtpmidid0: build
-	mkdir -p $(PREFIX)/lib/
-	cp -a build/lib/lib*so* $(PREFIX)/lib/
-	mkdir -p $(PREFIX)/share/doc/librtpmidid0/
-	cp README.md $(PREFIX)/share/doc/librtpmidid0/
-	cp README.librtpmidid.md $(PREFIX)/share/doc/librtpmidid0/
-	cp LICENSE-lib.txt $(PREFIX)/share/doc/librtpmidid0/LICENSE.txt
+	mkdir -p $(USR)/lib/
+	cp -a build/lib/lib*so* $(USR)/lib/
+	mkdir -p $(USR)/share/doc/librtpmidid0/
+	cp README.md $(USR)/share/doc/librtpmidid0/
+	cp README.librtpmidid.md $(USR)/share/doc/librtpmidid0/
+	cp LICENSE-lib.txt $(USR)/share/doc/librtpmidid0/LICENSE.txt
 
 install-librtpmidid0-dev: build
-	mkdir -p $(PREFIX)/lib/ $(PREFIX)/include/
-	cp -a build/lib/lib*.a $(PREFIX)/lib/
-	cp -a include/rtpmidid $(PREFIX)/include/
-	mkdir -p $(PREFIX)/share/doc/librtpmidid0-dev/
-	cp README.md $(PREFIX)/share/doc/librtpmidid0-dev/
-	cp README.librtpmidid.md $(PREFIX)/share/doc/librtpmidid0-dev/
-	cp LICENSE-lib.txt $(PREFIX)/share/doc/librtpmidid0-dev/LICENSE.txt
+	mkdir -p $(USR)/lib/ $(USR)/include/
+	cp -a build/lib/lib*.a $(USR)/lib/
+	cp -a include/rtpmidid $(USR)/include/
+	mkdir -p $(USR)/share/doc/librtpmidid0-dev/
+	cp README.md $(USR)/share/doc/librtpmidid0-dev/
+	cp README.librtpmidid.md $(USR)/share/doc/librtpmidid0-dev/
+	cp LICENSE-lib.txt $(USR)/share/doc/librtpmidid0-dev/LICENSE.txt

debian/rules

@@ -22,13 +22,13 @@ override_dh_auto_build:
 override_dh_auto_install:
 
 override_dh_install:
-	make install-rtpmidid PREFIX=debian/rtpmidid/usr
+	make install-rtpmidid DESTDIR=debian/rtpmidid/ SYSCONFDIR=etc PREFIX=usr
 
 	# We shouldn't ship service file in /etc/systemd/system
 	rm -rf debian/rtpmidid/etc/systemd
 
-	make install-librtpmidid0 PREFIX=debian/librtpmidid0/usr
-	make install-librtpmidid0-dev PREFIX=debian/librtpmidid0-dev/usr
+	make install-librtpmidid0 DESTDIR=debian/librtpmidid0/ SYSCONFDIR=etc PREFIX=usr
+	make install-librtpmidid0-dev DESTDIR=debian/librtpmidid0-dev/ SYSCONFDIR=etc PREFIX=usr
 
 	# Move the unversioned symlink into the -dev package.
 	mv debian/librtpmidid0/usr/lib/*so debian/librtpmidid0-dev/usr/lib