| Value | Meaning |
|---|---|
| ipv61 | IPv6-enabled |
| kerberos42 | kerberos auth is supported |
| ssl4 | SSL options are present |
| libz8 | libz features are present |
| ntlm16 | NTLM auth is supported |
| gssnegotiate32 | Negotiate auth support |
| dbg64 | built with debug capabilities |
| asynchdns128 | asynchronous dns resolves |
| spnego256 | SPNEGO auth |
| largefile512 | supports files bigger than 2GB |
| idn1024 | International Domain Names support |
| sspi2048 | SSPI is supported |
| conv4096 | character conversions supported |
| curldebug8192 | debug memory tracking supported |
| tlsauth_srp16_384 | TLS-SRP auth is supported |