From 3b4046adeb0d56edd21144b693044a23ea798680 Mon Sep 17 00:00:00 2001
From: Mattias Andrée <maandree@kth.se>
Date: Thu, 16 Sep 2021 16:07:07 +0200
Subject: Improve makefile
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Signed-off-by: Mattias Andrée <maandree@kth.se>
---
 Makefile  | 18 +++++++++---------
 config.mk |  8 +++++---
 2 files changed, 14 insertions(+), 12 deletions(-)

diff --git a/Makefile b/Makefile
index 835ce98..90595a1 100644
--- a/Makefile
+++ b/Makefile
@@ -3,13 +3,14 @@
 CONFIGFILE = config.mk
 include $(CONFIGFILE)
 
+
 all: alarm
 
-alarm.o: alarm.c
-	$(CC) -c -o $@ alarm.c $(CCFLAGS) $(CPPFLAGS)
+.c.o:
+	$(CC) -c -o $@ $< $(CFLAGS) $(CPPFLAGS)
 
-alarm: alarm.o
-	$(CC) -o $@ alarm.o $(LDFLAGS)
+.o:
+	$(CC) -o $@ $< $(LDFLAGS)
 
 check: alarm
 	./alarm 1 sleep 2 & a=$$! ;\
@@ -19,19 +20,18 @@ check: alarm
 
 install: alarm
 	mkdir -p -- "$(DESTDIR)$(PREFIX)/bin"
-	mkdir -p -- "$(DESTDIR)$(PREFIX)/share/licenses/alarm"
 	mkdir -p -- "$(DESTDIR)$(MANPREFIX)/man1"
 	cp -- alarm "$(DESTDIR)$(PREFIX)/bin/"
-	cp -- LICENSE "$(DESTDIR)$(PREFIX)/share/licenses/alarm/"
 	cp -- alarm.1 "$(DESTDIR)$(MANPREFIX)/man1/"
 
 uninstall:
 	-rm -- "$(DESTDIR)$(PREFIX)/bin/alarm"
-	-rm -- "$(DESTDIR)$(PREFIX)/share/licenses/alarm/LICENSE"
 	-rm -- "$(DESTDIR)$(MANPREFIX)/man1/alarm.1"
-	-rmdir -- "$(DESTDIR)$(PREFIX)/share/licenses/alarm"
 
 clean:
-	-rm -rf -- alarm *.o
+	-rm -rf -- alarm *.o *.su
+
+.SUFFIXES:
+.SUFFIXES: .o .c
 
 .PHONY: all check install uninstall clean
diff --git a/config.mk b/config.mk
index 5f26cd2..aa81003 100644
--- a/config.mk
+++ b/config.mk
@@ -1,6 +1,8 @@
-PREFIX = /usr/local
+PREFIX    = /usr
 MANPREFIX = $(PREFIX)/share/man
 
-CCFLAGS  = -std=c99 -Wall -Wextra -O2
-CPPFLAGS = 
+CC = cc
+
+CPPFLAGS = -D_DEFAULT_SOURCE -D_BSD_SOURCE -D_XOPEN_SOURCE=700
+CFLAGS   = -std=c99 -Wall -O2
 LDFLAGS  = -s
-- 
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