Re: [boost] [release] Boost 1.84.0 Beta 1 Release Candidate 1 is available

Marshall Clow wrote:

On Nov 9, 2023, at 3:28 PM, Peter Dimov via Boost wrote:

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Marshall Clow wrote:

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The libraries were built successfully using C++11/14/17/20/2B.

However, when building for C++03, the following libraries failed to build

* Any * lexical_cast * thread * type_index

These libraries don't support C++03 anymore.

Apparently not everyone has gotten the message. lexical_cast.h is included from boost/graph/graphml.hpp any.h is included from contract.

Here are the files that failed to compile: [...]

I think I remember that libc++ supported some C++11 library features even under C++03, so under a different stdlib there might be even more failures.

Looking at the meta/libraries.json files. Boost.Contract has no language requirement Boost.Graph requires C++03. Boost.ProgramOptions requires C++11 — so why is it getting built? Boost.Thread requires C++11 — so why is it getting built?

meta/libraries.json doesn't affect what is and what isn't getting built. But the first question we need to answer before proceeding is, are we going to even support building under C++03? Not much is going to get built (if anything at all.) Investing effort into making sure everything is good and proper under C++03 doesn't seem to have much return.