On Friday, 10 November 2023 00:11:11 PST Marc Mutz via Development wrote: > On 09.11.23 16:28, Thiago Macieira wrote: > > But if the symbols are globally visible (ELF visibility STV_DEFAULT) > > That counts as "exported", doesn't it?
Yes. > Which leaves us with: > - MSVC doesn't export anything by default; inline functions are, > however, exported when the surrounding class is wholly exported > - on all other platforms, all functions are by default "exported", but > we emulate MSVC on those platforms by changing the default visibility to > hidden, incl. for inline functions > > And my previous questions: > > - do our BC guarantees exist at all in the absence of > `-fvisibility=hidden -fvisibility-inlines-hidden`? Yes, we have to, because we don't control how the user's library is being compiled. > - does making the Qt and std::ordering types BC with each other not > solve the problem in this case, too? It does. We should really do that for Qt 7.0. The problem is that QPartialOrdering::Unordered has been in our ABI since 6.1 and we can't change that any more. -- Thiago Macieira - thiago.macieira (AT) intel.com Cloud Software Architect - Intel DCAI Cloud Engineering
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