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CMake 3.18 was released on 2020-07-15. It enables using (and/or dropping workarounds) for these features: LTO support, better performance and pkg-config support, `OBJECT` target, `-S`, `-B`, `--verbose`, `--install` on the command-line, lib directory support in interface targets, target_link_options(), LINK_OPTIONS, FetchContent, `list(PREPEND ...)`, unity, Ninja, fixed imported global issues. Ref: https://github.com/curl/curl/discussions/18704 Closes #19902
79 lines
2.5 KiB
Markdown
79 lines
2.5 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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# Items to be removed from future curl releases
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If any of these deprecated features is a cause for concern for you, please
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email the
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[curl-library mailing list](https://lists.haxx.se/listinfo/curl-library)
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as soon as possible and explain to us why this is a problem for you and
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how your use case cannot be satisfied properly using a workaround.
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## Windows XP
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In January 2026, curl drops support for Windows XP and Server 2003. Their
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"mainstream support" ended in 2014, with final updates on May 14, 2019.
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Making the new minimum target Windows version Vista / Server 2008.
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## c-ares 1.16.0
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In March 2026, we drop support for all c-ares versions before 1.16.0.
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## OpenSSL-QUIC
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OpenSSL-QUIC is what we call the curl QUIC backend that uses the OpenSSL QUIC
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stack.
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- It is slower and uses more memory than the alternatives and is only
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experimental in curl.
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- It gets little attention from OpenSSL and we have no expectation of the
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major flaws getting corrected anytime soon.
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- No one has spoken up for keeping it
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- curl users building with vanilla OpenSSL can still use QUIC through the
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means of ngtcp2
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We remove the OpenSSL-QUIC backend in January 2026.
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## RTMP
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RTMP in curl is powered by the 3rd party library librtmp.
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- RTMP is barely used by curl users (2.2% in the 2025 survey)
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- librtmp has no test cases, makes no proper releases and has not had a single
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commit within the last year
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- librtmp parses the URL itself and requires non-compliant URLs for this
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- we have no RTMP tests
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Support for RTMP in libcurl gets removed in April 2026.
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## CMake 3.17 and earlier
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We remove support for CMake <3.18 in April 2026.
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CMake 3.18 was released on 2020-07-15.
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## Past removals
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- axTLS (removed in 7.63.0)
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- Pipelining (removed in 7.65.0)
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- PolarSSL (removed in 7.69.0)
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- NPN (removed in 7.86.0)
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- Support for systems without 64-bit data types (removed in 8.0.0)
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- NSS (removed in 8.3.0)
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- gskit (removed in 8.3.0)
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- MinGW v1 (removed in 8.4.0)
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- NTLM_WB (removed in 8.8.0)
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- space-separated `NOPROXY` patterns (removed in 8.9.0)
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- hyper (removed in 8.12.0)
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- Support for Visual Studio 2005 and older (removed in 8.13.0)
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- Secure Transport (removed in 8.15.0)
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- BearSSL (removed in 8.15.0)
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- msh3 (removed in 8.16.0)
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- winbuild build system (removed in 8.17.0)
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- Windows CE (removed in 8.18.0)
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- Support for Visual Studio 2008 (removed in 8.18.0)
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- OpenSSL 1.1.1 and older (removed in 8.18.0)
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