CentOS 6.7 安裝 cloog-ppl-0.15.7-1.2.el6.i686.rpm 失敗

錯誤描述：
[root@centora software]# rpm -ivh cloog-ppl-0.15.7-1.2.el6.i686.rpm
warning: cloog-ppl-0.15.7-1.2.el6.i686.rpm: Header V3 RSA/SHA256 Signature, key ID c105b9de: NOKEY
error: Failed dependencies:
        libppl.so.7 is needed by cloog-ppl-0.15.7-1.2.el6.i686
        libppl_c.so.2 is needed by cloog-ppl-0.15.7-1.2.el6.i686

解決辦法：
[root@centora software]# rpm -ivh mpfr-2.4.1-6.el6.i686.rpm
warning: mpfr-2.4.1-6.el6.i686.rpm: Header V3 RSA/SHA256 Signature, key ID c105b9de: NOKEY
Preparing...                ########################################### [100%]
   1:mpfr                   ########################################### [100%]
[root@centora software]# rpm -ivh ppl-0.10.2-11.el6.i686.rpm
warning: ppl-0.10.2-11.el6.i686.rpm: Header V3 RSA/SHA256 Signature, key ID c105b9de: NOKEY
Preparing...                ########################################### [100%]
   1:ppl                    ########################################### [100%]
[root@centora software]# rpm -ivh cloog-ppl-0.15.7-1.2.el6.i686.rpm
warning: cloog-ppl-0.15.7-1.2.el6.i686.rpm: Header V3 RSA/SHA256 Signature, key ID c105b9de: NOKEY
Preparing...                ########################################### [100%]
   1:cloog-ppl              ########################################### [100%]