moved source files in sub dirs for chapters; split Makefile for chapter10 & chapter11 sources

21st_century_c/chapter10/Makefile

@@ -0,0 +1,22 @@
+CFLAGS = -Wall -O3 --std=c11
+
+
+boxes : boxes.c
+	$(CC) $(CFLAGS) $@.c -o $@
+
+show_tree : process_dir.h process_dir.c show_tree.c
+	$(CC) $(CFLAGS) process_dir.c $@.c -o $@
+
+
+.PHONY : all
+all : boxes show_tree
+
+.PHONY : check
+check : *.h *.c
+	cppcheck --enable=warning --enable=style *.c
+
+.PHONY : clean
+clean :
+	rm -f boxes
+	rm -f show_tree
+	rm -rf *.dSYM