From bcadfc5420ef1bbbe995e0ad92bc1325c03dd709 Mon Sep 17 00:00:00 2001
From: Daniel Friesel <derf@derf.homelinux.org>
Date: Sun, 9 May 2010 19:05:42 +0200
Subject: Add config.mk & PREFIX/DESTDIR support

---
 Makefile  | 22 +++++++++++-----------
 config.mk |  7 +++++++
 2 files changed, 18 insertions(+), 11 deletions(-)
 create mode 100644 config.mk

diff --git a/Makefile b/Makefile
index 06bf4ff..7867107 100644
--- a/Makefile
+++ b/Makefile
@@ -1,22 +1,22 @@
-CFLAGS = -Wall -Wextra -pedantic -O2
-prefix = /usr/local
+include config.mk
 
 all: bin/host
 
-bin/%: src/%.c
+bin/host: src/host.c
 	mkdir -p bin
-	$(CC) $(CFLAGS) -o $@ $<
+	${CC} ${CFLAGS} -o $@ $<
 
 install: bin/host
-	mkdir -p $(prefix)/bin $(prefix)/share/man/man1
-	cp bin/host $(prefix)/bin/host
-	cp man/1/host $(prefix)/share/man/man1/host.1
-	chmod 755 $(prefix)/bin/host
-	chmod 644 $(prefix)/share/man/man1/host.1
+	@echo installing bin to ${bin_dir} and man to ${man_dir}
+	@mkdir -p ${bin_dir} ${man_dir}/man1
+	@cp bin/host ${bin_dir}/host
+	@cp man/1/host ${man_dir}/man1/host.1
+	@chmod 755 ${bin_dir}/host
+	@chmod 644 ${man_dir}/man1/host.1
 
 uninstall:
-	rm -f $(prefix)/bin/host
-	rm -f $(prefix)/share/man/man1/host.1
+	rm -f ${bin_dir}/host
+	rm -f ${man_dir}/man1/host.1
 
 clean:
 	rm -f bin/host
diff --git a/config.mk b/config.mk
new file mode 100644
index 0000000..cc71072
--- /dev/null
+++ b/config.mk
@@ -0,0 +1,7 @@
+CFLAGS ?= -Wall -Wextra -pedantic -O2
+PREFIX ?= /usr/local
+
+main_dir = ${DESTDIR}${PREFIX}
+
+man_dir = ${main_dir}/share/man
+bin_dir = ${main_dir}/bin
-- 
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