2022-02-17 12:49:05 +03:00
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# curl internals
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2000-05-22 21:35:35 +04:00
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2022-02-17 12:49:05 +03:00
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The canonical libcurl internals documentation is now in the [everything
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curl](https://everything.curl.dev/internals) book. This file lists supported
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versions of libs, tools and operating systems.
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2015-06-10 00:57:22 +03:00
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2022-02-17 12:49:05 +03:00
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## Portability
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2008-06-13 01:03:16 +04:00
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2021-11-26 10:46:59 +03:00
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We write curl and libcurl to compile with C89 compilers. On 32-bit and up
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2021-10-31 18:34:44 +03:00
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machines. Most of libcurl assumes more or less POSIX compliance but that is
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2008-06-13 01:03:16 +04:00
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not a requirement.
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We write libcurl to build and work with lots of third party tools, and we
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want it to remain functional and buildable with these and later versions
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(older versions may still work but is not what we work hard to maintain):
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2022-02-17 12:49:05 +03:00
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## Dependencies
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We aim to support these or later versions.
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2015-06-10 00:57:22 +03:00
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- OpenSSL 0.9.7
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2020-04-20 23:23:48 +03:00
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- GnuTLS 3.1.10
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2015-06-10 00:57:22 +03:00
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- zlib 1.1.4
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2020-10-22 13:29:21 +03:00
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- libssh2 1.0
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2021-09-06 17:00:52 +03:00
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- c-ares 1.16.0
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2017-11-14 14:47:04 +03:00
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- libidn2 2.0.0
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2019-06-02 17:55:05 +03:00
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- wolfSSL 2.0.0
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2015-06-10 00:57:22 +03:00
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- openldap 2.0
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- MIT Kerberos 1.2.4
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- GSKit V5R3M0
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- NSS 3.14.x
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- Heimdal ?
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2020-02-21 13:30:05 +03:00
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- nghttp2 1.12.0
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2020-08-30 13:21:53 +03:00
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- WinSock 2.2 (on Windows 95+ and Windows CE .NET 4.1+)
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2015-06-10 00:57:22 +03:00
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2022-02-17 12:49:05 +03:00
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## Operating Systems
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2008-06-13 01:03:16 +04:00
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On systems where configure runs, we aim at working on them all - if they have
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2022-02-17 12:49:05 +03:00
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a suitable C compiler. On systems that do not run configure, we strive to
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keep curl running correctly on:
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2008-06-13 01:03:16 +04:00
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2015-06-10 00:57:22 +03:00
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- Windows 98
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- AS/400 V5R3M0
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- Symbian 9.1
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- Windows CE ?
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- TPF ?
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2022-02-17 12:49:05 +03:00
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## Build tools
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2008-06-13 01:03:16 +04:00
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2008-06-13 01:16:00 +04:00
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When writing code (mostly for generating stuff included in release tarballs)
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we use a few "build tools" and we make sure that we remain functional with
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these versions:
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2015-06-10 00:57:22 +03:00
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- GNU Libtool 1.4.2
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- GNU Autoconf 2.57
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- GNU Automake 1.7
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- GNU M4 1.4
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- perl 5.004
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- roffit 0.5
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2019-05-17 01:11:27 +03:00
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- groff ? (any version that supports `groff -Tps -man [in] [out]`)
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