当我们在 Amazon Linux ElasticBeanstalk 实例中安装 ClamAV 时，yum install clamav虽然实例中存在库，但它安装时不支持 PCRE。
LibClamAV Warning: cli_loadldb: logical signature for Win.Trojan.ssid18332-1
uses PCREs but support is disabled, skipping
LibClamAV Warning: cli_loadldb: logical signature for Win.Ransomware.Locky-4
uses PCREs but support is disabled, skipping
LibClamAV Warning: cli_loadldb: logical signature for Html.Exploit.CVE_2016_0184-1
uses PCREs but support is disabled, skipping
但是机器上安装了 PCRE：
# yum install pcre
...
Package pcre-8.21-7.7.amzn1.x86_64 already installed and latest version
Nothing to do
扫描也非常慢。
如何强制 ClamAV 使用/识别 Elastic Beanstalk 机器中安装的 PCRE 库？
谢谢！