Re: checking for OpenSSL version >= 0.9.8a... FAILED

["Dino Ciuffetti" <dino@xxxxxxxxx>]

./configure --prefix=/usr/local/apache2 --enable-deflate --enable-expires --enable-headers --enable-modules=reallyall --enable-ssl --enable-so --with-mpm=worker --enable-rewrite --with-apr=/usr/local/apr --with-apr-util=/usr/local/apr-util

what are my options to resolve this ?

please try to install the packages build-essential, libexpat1-dev and libssl-dev:
apt install build-essential libexpat1-dev libssl-dev