version.md (3429B)
1 --- 2 c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al. 3 SPDX-License-Identifier: curl 4 Long: version 5 Short: V 6 Help: Show version number and quit 7 Category: important curl 8 Added: 4.0 9 Multi: custom 10 See-also: 11 - help 12 - manual 13 Example: 14 - --version 15 --- 16 17 # `--version` 18 19 Display information about curl and the libcurl version it uses. 20 21 The first line includes the full version of curl, libcurl and other 3rd party 22 libraries linked with the executable. 23 24 This line may contain one or more TLS libraries. curl can be built to support 25 more than one TLS library which then makes curl - at start-up - select which 26 particular backend to use for this invocation. 27 28 If curl supports more than one TLS library like this, the ones that are *not* 29 selected by default are listed within parentheses. Thus, if you do not specify 30 which backend to use (with the `CURL_SSL_BACKEND` environment variable) the 31 one listed without parentheses is used. Such builds also have `MultiSSL` set as 32 a feature. 33 34 The second line (starts with `Release-Date:`) shows the release date. 35 36 The third line (starts with `Protocols:`) shows all protocols that libcurl 37 reports to support. 38 39 The fourth line (starts with `Features:`) shows specific features libcurl 40 reports to offer. Available features include: 41 42 ## `alt-svc` 43 Support for the Alt-Svc: header is provided. 44 45 ## `AsynchDNS` 46 This curl uses asynchronous name resolves. Asynchronous name resolves can be 47 done using either the c-ares or the threaded resolver backends. 48 49 ## `brotli` 50 Support for automatic brotli compression over HTTP(S). 51 52 ## `CharConv` 53 curl was built with support for character set conversions (like EBCDIC) 54 55 ## `Debug` 56 This curl uses a libcurl built with Debug. This enables more error-tracking 57 and memory debugging etc. For curl-developers only. 58 59 ## `ECH` 60 ECH support is present. 61 62 ## `gsasl` 63 The built-in SASL authentication includes extensions to support SCRAM because 64 libcurl was built with libgsasl. 65 66 ## `GSS-API` 67 GSS-API is supported. 68 69 ## `HSTS` 70 HSTS support is present. 71 72 ## `HTTP2` 73 HTTP/2 support has been built-in. 74 75 ## `HTTP3` 76 HTTP/3 support has been built-in. 77 78 ## `HTTPS-proxy` 79 This curl is built to support HTTPS proxy. 80 81 ## `IDN` 82 This curl supports IDN - international domain names. 83 84 ## `IPv6` 85 You can use IPv6 with this. 86 87 ## `Kerberos` 88 Kerberos V5 authentication is supported. 89 90 ## `Largefile` 91 This curl supports transfers of large files, files larger than 2GB. 92 93 ## `libz` 94 Automatic decompression (via gzip, deflate) of compressed files over HTTP is 95 supported. 96 97 ## `MultiSSL` 98 This curl supports multiple TLS backends. 99 100 ## `NTLM` 101 NTLM authentication is supported. 102 103 ## `NTLM_WB` 104 NTLM delegation to winbind helper is supported. 105 This feature was removed from curl in 8.8.0. 106 107 ## `PSL` 108 PSL is short for Public Suffix List and means that this curl has been built 109 with knowledge about "public suffixes". 110 111 ## `SPNEGO` 112 SPNEGO authentication is supported. 113 114 ## `SSL` 115 SSL versions of various protocols are supported, such as HTTPS, FTPS, POP3S 116 and so on. 117 118 ## `SSLS-EXPORT` 119 This build supports TLS session export/import, like with the --ssl-sessions. 120 121 ## `SSPI` 122 SSPI is supported. 123 124 ## `TLS-SRP` 125 SRP (Secure Remote Password) authentication is supported for TLS. 126 127 ## `TrackMemory` 128 Debug memory tracking is supported. 129 130 ## `Unicode` 131 Unicode support on Windows. 132 133 ## `UnixSockets` 134 Unix sockets support is provided. 135 136 ## `zstd` 137 Automatic decompression (via zstd) of compressed files over HTTP is supported.