用ubuntu编译源码出错！！！

我在用make services编译时，报如下错误
host Executable: aapt (out/host/linux-x86/obj/EXECUTABLES/aapt_intermediates/aapt)
/usr/bin/ld: cannot find -lz
/usr/bin/ld: cannot find -lz
collect2: ld returned 1 exit status
make: *** [out/host/linux-x86/obj/EXECUTABLES/aapt_intermediates/aapt] 错误 1我用了网上说的方法如下还是不行，怎么解决？解决方法：修改./framework/base/tools/aapt/Android.mk文件
LOCAL_LDLIBS := -lz
ifeq ($(HOST_OS),linux)
-LOCAL_LDLIBS += -lrt
+LOCAL_LDLIBS += -lrt -lpthread
endif
ifeq ($(HOST_OS),windows)