From 947a7e332908dcba1c7e523fbdc927d39ee6adb1 Mon Sep 17 00:00:00 2001
From: Hans Ulrich Niedermann <hun@n-dimensional.de>
Date: Tue, 19 Nov 2013 23:40:50 +0100
Subject: [PATCH] Make build/install more user and packaging friendly

Make the build and install more user and packaging friendly
by introducing the following features in the Makefile:

  * Honor the $(CFLAGS) set when calling make.

  * Prefix all install locations with $(DESTDIR) for
    easy package building.

  * Use GNU Makefile conventions for defining installation
    directories. This means $(bindir) and $(man1dir)
    instead of the former $(INSTALL_DIR) and $(MAN_DIR).

  * Use install(1) for installing files and directories
    so that permissions can be set properly.

  * Stop "make clean" failing when it has nothing to do.

  * Add 'uninstall' make target.

  * Make 'install' target build executable if necessary.
---
 Makefile | 40 +++++++++++++++++++++++++++++-----------
 1 file changed, 29 insertions(+), 11 deletions(-)

diff --git a/Makefile b/Makefile
index 0f4f810..942a7a5 100644
--- a/Makefile
+++ b/Makefile
@@ -1,19 +1,37 @@
 CC=gcc
 FLAGS=-Wall -O2
+
+INSTALL=install
+
 EXEC_NAME=beep
-INSTALL_DIR=/usr/bin
 MAN_FILE=beep.1.gz
-MAN_DIR=/usr/share/man/man1
 
-default : beep
+# Use GNU makefile conventions for directory names with one notable
+# exception: prefix is not /usr/local in order to keep the default
+# installation location for beep.
+prefix=/usr
+exec_prefix=$(prefix)
+bindir=$(exec_prefix)/bin
+datarootdir=$(prefix)/share
+mandir=$(datarootdir)/man
+man1dir=$(mandir)/man1
+
+.PHONY: all
+all: $(EXEC_NAME)
+
+.PHONY: clean
+clean:
+	rm -f $(EXEC_NAME)
 
-clean :
-	rm ${EXEC_NAME}
+$(EXEC_NAME): beep.c
+	$(CC) $(FLAGS) $(CFLAGS) -o $(EXEC_NAME) beep.c
 
-beep : beep.c
-	${CC} ${FLAGS} -o ${EXEC_NAME} beep.c
+install: all
+	$(INSTALL) -m 0755 -d           $(DESTDIR)$(bindir)
+	$(INSTALL) -m 0755 $(EXEC_NAME) $(DESTDIR)$(bindir)/
+	$(INSTALL) -m 0755 -d           $(DESTDIR)$(man1dir)
+	$(INSTALL) -m 0644 $(MAN_FILE)  $(DESTDIR)$(man1dir)/
 
-install :
-	cp ${EXEC_NAME} ${INSTALL_DIR}
-	# rm -f /usr/man/man1/beep.1.bz2
-	cp ${MAN_FILE} ${MAN_DIR}
+uninstall:
+	rm -f $(DESTDIR)$(bindir)/$(EXEC_NAME)
+	rm -f $(DESTDIR)$(man1dir)/$(MAN_FILE)
-- 
2.7.5