libxml2-2.9.0安装出问题
make的时候
Making install in .
make[2]: Entering directory `/mnt/hgfs/LinuxShare/libxml2-2.9.0'
CCLD xmllint
./.libs/libxml2.so: undefined reference to `__builtin_clzll'
collect2: ld returned 1 exit status
make[2]: *** [xmllint] Error 1
make[2]: Leaving directory `/mnt/hgfs/LinuxShare/libxml2-2.9.0'
make[1]: *** [install-recursive] Error 1
make[1]: Leaving directory `/mnt/hgfs/LinuxShare/libxml2-2.9.0'
make: *** [install] Error 2

[解决办法]
yum解决libs/libxml2.so。