motivation
In the installation steps of upgrading openssh → → configuration command
./configure --prefix=/usr/local/openssh/ --sysconfdir=/etc/ssh --with-md5-passwords --with-pam --with-zlib --with-openssl-includes=/usr --with-privsep-path=/var/lib/sshd
An error was reported
configure: error: PAM headers not found
Solution
yum -y install pam-devel