I don't know if it's a serious issue or only a design bug, but despite of compiling apache with all option required for openssl to be compiled with my own version it still shows that a ssl version conflict is occuring.
here is thee compile cmd:

./configure --prefix=/usr/local/apache2.4 --enable-v4-mapped --enable-pie --enable-authn-anon --enable-authn-alias --enable-isapi --enable-file-cache --enable-cache --enable-disk-cache --enable-mem-cache --enable-dumpio --enable-example --enable-charset-lite --enable-deflate --enable-mime-magic --enable-headers --enable-ident --enable-usertrack --enable-unique-id --enable-proxy --enable-proxy-connect --enable-proxy-http --enable-proxy-balancer --enable-http --enable-dav --enable-vhost-alias --enable-imagemap --enable-rewrite --enable-so --enable-mpms-shared=all --enable-cgi --enable-suexec --enable-remoteip --enable-buffer --enable-nghttp2-staticlib-deps --enable-http2 --enable-proxy-http2 --with-included-apr --with-ssl=/usr/local/openssl-1.0.2 --enable-ssl=static

after restart httpd I go in the log:

[ssl:warn] [pid 3742] AH01882: Init: this version of mod_ssl was compiled against a newer library (OpenSSL 1.0.2n  7 Dec 2017, version currently loaded is OpenSSL 1.0.2m  2 Nov 2017) - may result in undefined or erroneous behavior
[mpm_prefork:notice] [pid 3756] AH00163: Apache/2.4.29 (Unix) OpenSSL/1.0.2m mod_wsgi/4.5.22 Python/2.7 mod_fcgid/2.3.9 mod_perl/2.0.10 Perl/v5.24.3 configured -- resuming normal operations

Am I missing something?

thanks