当尝试安装maxscale 时，它会询问libpcre。如何在 Linux上安装libpcre？
rpm -ivh maxscale-1.4.3-1.rhel.7.x86_64.rpm
warning: maxscale-1.4.3-1.rhel.7.x86_64.rpm: Header V4 RSA/SHA1 Signature, key ID 8167ee24: NOKEY
error: Failed dependencies:
libpcre.so.1()(64bit) is needed by maxscale-1.4.3-1.x86_64