https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97869
Bug ID: 97869 Summary: <version> defines __cpp_lib_span even when <span> doesn't provide an implementation Product: gcc Version: 11.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: libstdc++ Assignee: unassigned at gcc dot gnu.org Reporter: rs2740 at gmail dot com Target Milestone: --- <version> defines __cpp_lib_span if __cplusplus > 201703L and _GLIBCXX_HOSTED, but <span> only provides a definition of std::span when __cpp_lib_concepts is defined.