If any of these deprecated features is a cause for concern for you, please email the curl-library mailing list as soon as possible and explain to us why this is a problem for you and how your use case cannot be satisfied properly using a workaround.
Nothing is currently scheduled to be removed.
The msh3 backed for QUIC and HTTP/3 was introduced in April 2022 but has never been made to work properly. It has seen no visible traction or developer activity from the msh3 main author (or anyone else seemingly interested) in two years. As a non-functional backend, it only adds friction and “weight” to the development and maintenance.
Meanwhile, we have a fully working backend in the ngtcp2 one and we have two fully working backends in OpenSSL-QUIC and quiche well on their way of ending their experimental status in a future.
We remove msh3 support from the curl source tree in July 2025.
curl drops support for the winbuild build method after September 2025.
We recommend migrating to CMake. See the migration guide in docs/INSTALL-CMAKE.md.
Windows CE “mainstream support” ended on October 9, 2018, and “Extended Support” ended on October 10, 2023.
curl drops all support in November 2025.
curl drops support for getting built with Microsoft Visual Studio 2008 in November 2025.
The only reason we kept support for this version is for Windows CE - and we intend to remove support for that Operating System in this time frame as well. Bumping the minimum to VS2010. VS2008 is a pain to support.
Previous discussion and details: https://github.com/curl/curl/discussions/15972
NOPROXY patterns (removed in 8.9.0)