On Wed, 15 Mar 2023 at 22:14, Ben Beasley <c...@musicinmybrain.net> wrote:
> Thank you for prompting me to look at this more closely. A quick > investigation reveals: > > “Abseil libraries require C++14 as the current minimum standard. When > compiled with C++17 (either because it is the compiler's default or > explicitly requested), then Abseil requires C++17.” > > > https://github.com/abseil/abseil-cpp/blob/20230125.1/CMake/AbseilHelpers.cmake#L291 > > The abseil-cpp package in Fedora has been compiled as C++17 for some > time—at first explicitly, but this would also now be the default if the > spec file did not configure a particular standard—so it seems dependent > packages already technically needed C++17, and it is mere happenstance that > this particular release is revealing incompatibilities. > I'm not sure if that's true, see my other email which crossed with yours. In the previous release absl::string_view would work for both C++14 and C++17, because USE_STD_STRING_VIEW was defined to 2, so adapted to the headers that included it. In the new release it is hardcoded to only work for C++17. That seems like a new change in the new version, not something that was already present.
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