Add build information to binary
[root@test ~]# nginx -V nginx version: nginx/1.12.2 built by gcc 4.8.5 20150623 (Red Hat 4.8.5-36) (GCC) built with OpenSSL 1.0.2k-fips 26 Jan 2017 TLS SNI support enabled configure arguments: --prefix=/usr/share/nginx --sbin-path=/usr/sbin/nginx etc....
As tor versions up rapidly stable repos sometimes host legacy versions of tor.
Some people like me tend to just compile it ourselves and replace the binary, to enjoy the benefit of packaging and to follow up on new versions.
It would be nice to add build informations, such as gcc version, library versions and configure arguments. That way people like me can replicate exactly what the package managers are doing.