--- /dev/null
+--- a/C/7zip/Compress/LZMA_Lib/makefile
++++ b/C/7zip/Compress/LZMA_Lib/makefile
+@@ -2,7 +2,7 @@ PROG = liblzma.a
+ CXX = g++ -O3 -Wall
+ AR = ar
+ RM = rm -f
+-CFLAGS = -c -I ../../../
++CFLAGS += -c -I ../../../
+
+ OBJS = \
+ ZLib.o \