Hello,

We are considering dropping support for Visual Studio 2013 and Visual Studio 2015 from Mbed TLS 3.6 onwards. This would make Mbed TLS 3.6 require Visual Studio 2017 or newer. (Mbed TLS 2.28 LTS is not affected.)

Per the Visual Studio product lifecycle https://learn.microsoft.com/en-us/visualstudio/productinfo/vs-servicing#older-versions-of-visual-studio, VS 2013 and 2015 are currently on extended support, but their support will end during the lifetime of Mbed TLS 3.6 LTS.

Our reasons are:

* We prefer not to support products that are not supported upstream, such as VS 2013 and 2015 will be during the lifetime of 3.6 LTS. * Older versions of Visual Studio tend to require workarounds due to their incomplete support for C99, and we would like to reduce those. We may drop support for older versions of MinGW as well for this reason. * The development branch of Mbed TLS is currently triggering an internal compiler error in VS 2015 https://github.com/Mbed-TLS/mbedtls/issues/8735.

If you want to keep support for VS 2013 and 2015 in Mbed TLS 3.6, please let us know as soon as possible and tell us why it's important. Assistance with the internal compiler error would be appreciated.

Best regards,