Brought back makefile

makefile

@@ -0,0 +1,37 @@
+CFLAGS += -std=c99 -pedantic -g -D_XOPEN_SOURCE=700
+builddir = bin
+prefix = /usr/local
+exec_prefix = $(prefix)
+bindir = $(exec_prefix)/bin
+mandir = $(prefix)/man
+INSTALLPROGRAM = \install
+
+UTILS = asa basename cat cksum cmp dirname echo expand false head link ln pwd true tty wc
+
+all: $(UTILS)
+
+install-strip: INSTALLPROGRAM = \install -s
+install-strip: install
+
+install: installdirs
+	$(INSTALLPROGRAM) $(builddir)/* $(bindir)
+	$(INSTALLPROGRAM) *.1 $(mandir)
+
+%: %.c bindirs
+	$(CC) $(CFLAGS) -o $(builddir)/$@ $<
+
+installdirs:
+	if [ ! -d "$(bindir)"]; then \
+		mkdir $(bindir); \
+	fi
+
+bindirs:
+	if [ ! -d "$(builddir)" ]; then \
+		mkdir $(builddir); \
+	fi
+
+uninstall:
+	#remove utilities in $(bindir)
+
+clean:
+	-rm -rf $(builddir)