无法在更新的PHP 7.3上安装mcrypt。RHEL 7.6服务器上的6

我尝试了以下步骤：安装php7时出现问题。2-mcrypt

还有一些其他的方法。

# yum install php-pecl
Loaded plugins: enabled_repos_upload, langpacks, package_upload, product-id, search-disabled-repos, subscription-manager
rhel-7-server-rpms                                                                                                                               | 2.0 kB  00:00:00
(1/2): rhel-7-server-rpms/7Server/x86_64/updateinfo                                                                                              | 3.3 MB  00:00:00
(2/2): rhel-7-server-rpms/7Server/x86_64/primary                                                                                                 |  44 MB  00:00:01
rhel-7-server-rpms                                                                                                                                          26177/26177
No package php-pecl available.
Error: Nothing to do
Uploading Enabled Repositories Report
Loaded plugins: langpacks, product-id, subscription-manager

# yum install libmcrypt-dev libreadline-dev
Loaded plugins: enabled_repos_upload, langpacks, package_upload, product-id, search-disabled-repos, subscription-manager
rhel-7-server-rpms                                                                                                                               | 2.0 kB  00:00:00
No package libmcrypt-dev available.
No package libreadline-dev available.
Error: Nothing to do
Uploading Enabled Repositories Report
Loaded plugins: langpacks, product-id, subscription-manager

# pecl install mcrypt-1.0.1
bash: pecl: command not found...