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After this patch curl requires targeting Vista or newer, and a toolchain with Vista support. Supported MSVC compilers (VS2010+) all support Vista: - VS2012+ target Win8 (or later) by default. - VS2010 targets Win7 by default. Supported mingw-w64 versions (v3+) all support Vista: - mingw-w64 v9+ target Win10 by default. - mingw-w64 v8 and older target Server 2003 (~XP) by default. After this patch it may be necessary to override the default Windows target version to Vista (or newer) via: autotools: `CPPFLAGS=-D_WIN32_WINNT=0x0600` cmake: `-DCURL_TARGET_WINDOWS_VERSION=0x0600` - mingw-w64 v6+ allow changing the default at toolchain build-time. Notes: - For non-MSVC, non-mingw-w64 toolchains, `if_nametoindex` needs to be allowlisted in `curl_setup.h`, if they do support it. Fixes #17985 (discussion) Closes #18009
65 lines
2.2 KiB
Markdown
65 lines
2.2 KiB
Markdown
<!--
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Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
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SPDX-License-Identifier: curl
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-->
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# curl internals
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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 and build tools.
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## Portability
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We write curl and libcurl to compile with C89 compilers on 32-bit and up
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machines. Most of libcurl assumes more or less POSIX compliance but that is
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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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## Dependencies
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We aim to support these or later versions.
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- brotli 1.0.0 (2017-09-21)
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- c-ares 1.6.0 (2008-12-09)
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- GnuTLS 3.6.5 (2018-12-01)
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- libidn2 2.0.0 (2017-03-29)
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- LibreSSL 2.9.1 (2019-04-22)
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- libssh 0.9.0 (2019-06-28)
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- libssh2 1.9.0 (2019-06-20)
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- mbedTLS 3.2.0 (2022-07-11)
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- MIT Kerberos 1.3 (2003-07-31)
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- nghttp2 1.15.0 (2016-09-25)
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- OpenLDAP 2.0 (2000-08-01)
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- OpenSSL 3.0.0 (2021-09-07)
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- Windows Vista 6.0 (2006-11-08 - 2012-04-10)
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- wolfSSL 3.4.6 (2017-09-22)
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- zlib 1.2.5.2 (2011-12-11)
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- zstd 1.0 (2016-08-31)
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## Build tools
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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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- cmake 3.7 (2016-11-11)
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- GNU autoconf 2.59 (2003-11-06)
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- GNU automake 1.7 (2002-09-25)
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- GNU libtool 1.4.2 (2001-09-11)
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- GNU m4 1.4 (2007-09-21)
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- mingw-w64 3.0 (2013-09-20)
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- perl 5.8 (2002-07-19), on Windows: 5.22 (2015-06-01)
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- Visual Studio 2010 10.0 (2010-04-12 - 2020-07-14)
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## Library Symbols
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All symbols used internally in libcurl must use a `Curl_` prefix if they are
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used in more than a single file. Single-file symbols must be made static.
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Public ("exported") symbols must use a `curl_` prefix. Public API functions
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are marked with `CURL_EXTERN` in the public header files so that all others
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can be hidden on platforms where this is possible.
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