Added 'install' target for Makefile

Makefile

@@ -2,20 +2,39 @@ CC=gcc
 CFLAGS=
 LIB_FILE = libeasysock.so
 
-all: easysock.o
+.PHONY: all
+all: $(LIB_FILE)
+
+
+$(LIB_FILE): easysock.o
 	$(CC) $(CFLAGS) -shared easysock.o -o $(LIB_FILE)
 
 easysock.o: easysock.c easysock.h
 	$(CC) $(CFLAGS) -fpic -c easysock.c -o easysock.o
 
+.PHONY: allwarn
 allwarn: CFLAGS+=-Wall -Wextra -pedantic
 allwarn: $(LIB_FILE)
 
+
+.PHONY: debug
 debug: CFLAGS+=-g
 debug: $(LIB_FILE)
-	
+
+.PHONY: static	
 static:
 
-install:
 
 
+
+ifndef PREFIX
+	PREFIX := /usr/local
+endif
+
+.PHONY: install
+install: $(LIB_FILE)
+	install -d $(DESTDIR)$(PREFIX)/lib
+	install -m 755 $(LIB_FILE) $(DESTDIR)$(PREFIX)/lib
+	
+	install -d $(DESTDIR)$(PREFIX)/include
+	install -m 644 easysock.h $(DESTDIR)$(PREFIX)/include