wget https://www.eecis.udel.edu/~ntp/ntp_spool/ntp4/ntp-4.2/ntp-4.2.8p15.tar.gz

mkdir /tmp/ntp

service ntp stop #关闭ntp服务，如果没有开启可以跳过

mv /usr/sbin/ntp* /tmp/ntp

tar xvf ntp4/ntp-4.2/ntp-4.2.8p15.tar.gz
cd ntp-4.2.8p15

vim include/ntp_syscall.h.patch #输入以下内容

--- ntp-4.2.4p7/include/ntp_syscall.h

+++ ntp-4.2.4p7/include/ntp_syscall.h

@@ -14,5+14,13 @@

#include

#endif

+#if defined(ADJ_NANO) && !defined(MOD_NANO)

+#define MOD_NANO ADJ_NANO

+#endif

+

+#if defined(ADJ_TAI) && !defined(MOD_TAI)

+#define MOD_TAI ADJ_TAI

+#endif

+

#ifndefNTP_SYSCALLS_LIBC

#ifdefNTP_SYSCALLS_STD

# cd include

# patch -p0 < ntp_syscall.h.patch

patch file to:ntp_syscall.h

# cd ..

# make && make install

cd include
patch -p1 < ntp_syscall.h.patch
#然后点击回车

cd ..
./configure --prefix=/usr/local/ntp --enable-all-clocks --enable-parse-clocks --enable-clockctl

make
make install
cp /usr/local/ntp/bin/ntp* /usr/sbin/

#注意检查ntp.conf的配置
chkconfig ntp on
service ntp start
service ntp status
ntpd --version