nfs的时间问题，影响编译

[root@okk dpdk]# rm -rf x86_64-native-linuxapp-gcc/
[root@okk dpdk]# A=`date +%s` ; B=`expr $A + `; echo $A ;date -s @"$B"  

Wed Mar   :: CST
[root@okk dpdk]# make config T=$RTE_TARGET O=$RTE_TARGET
make[]: Warning: File `/root/src/thirdparty/dpdk/dpdk-16.04/x86_64-native-linuxapp-gcc/.config' has modification time 0.74 s in the future
make[]: Warning: File `/root/src/thirdparty/dpdk/dpdk-16.04/x86_64-native-linuxapp-gcc/.depdirs' has modification time 0.66 s in the future
make[]: Warning: File `/root/src/thirdparty/dpdk/dpdk-16.04/x86_64-native-linuxapp-gcc/.config' has modification time 0.5 s in the future
make[]: warning:  Clock skew detected.  Your build may be incomplete.
make[]: Warning: File `/root/src/thirdparty/dpdk/dpdk-16.04/x86_64-native-linuxapp-gcc/.depdirs' has modification time 0.41 s in the future
make[]: Warning: File `/root/src/thirdparty/dpdk/dpdk-16.04/x86_64-native-linuxapp-gcc/.config' has modification time 0.24 s in the future
make[]: warning:  Clock skew detected.  Your build may be incomplete.
make[]: Warning: File `/root/src/thirdparty/dpdk/dpdk-16.04/x86_64-native-linuxapp-gcc/.depdirs' has modification time 0.15 s in the future
make[]: warning:  Clock skew detected.  Your build may be incomplete.
make[]: warning:  Clock skew detected.  Your build may be incomplete.
make[]: warning:  Clock skew detected.  Your build may be incomplete.
make[]: Warning: File `/root/src/thirdparty/dpdk/dpdk-16.04/x86_64-native-linuxapp-gcc/.depdirs' has modification time 0.65 s in the future
make[]: Warning: File `/root/src/thirdparty/dpdk/dpdk-16.04/x86_64-native-linuxapp-gcc/.depdirs' has modification time 0.51 s in the future
make[]: warning:  Clock skew detected.  Your build may be incomplete.
make[]: Warning: File `/root/src/thirdparty/dpdk/dpdk-16.04/x86_64-native-linuxapp-gcc/.depdirs' has modification time 0.66 s in the future
make[]: warning:  Clock skew detected.  Your build may be incomplete.
make[]: warning:  Clock skew detected.  Your build may be incomplete.
make[]: Warning: File `/root/src/thirdparty/dpdk/dpdk-16.04/x86_64-native-linuxapp-gcc/.depdirs' has modification time 0.66 s in the future
make[]: warning:  Clock skew detected.  Your build may be incomplete.
make[]: warning:  Clock skew detected.  Your build may be incomplete.
Configuration done
[root@okk dpdk]# A=`date +%s` ; B=`expr $A + `; echo $A ;date -s @"$B" 

Wed Mar   :: CST