I've committed some changes to the minimum versions of software needed to build Qpid Proton from the 0.40 release onwards.
This is partly motivated by PROTON-2810 which requires us to build the C++ bits as at least C++ 14 to be able to use Open Telemetry. But also partly just keeping up with the ever changing versions of software in recent releases of our supported platforms: The new minimum versions are: C/C++ compiler - C code is compiled as C99, and C++ code is compiled as C++ 17. - GCC minimum supported is now gcc 9 - MS Visual Studio minimum supported is now Visual Studio 16 (2019) Python - version 3.9 CMake - version 3.16 I don't think that this should cause issues for anyone using reasonably recent build platforms, but if somebody finds a problem please let me know/raise an issue in the bug database. Thanks Andrew
