OpenSSL_version_num() returns the version number.
-The macro OPENSSL_VERSION_AT_LEAST(major,minor) can be used at compile
-time test if the current version is at least as new as the version provided.
-The arguments major, minor and fix correspond to the version information
-as given above.
-
OpenSSL_version() returns different strings depending on B<t>:
=over 4