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D front-end changes: - Import dmd v2.098.1-beta.1. - Default extern(C++) compatibility to C++17. Druntime changes: - Import druntime v2.098.1-beta.1. - Fix definition of stat_t on MIPS64 (PR103604) Phobos changes: - Import phobos v2.098.1-beta.1. gcc/d/ChangeLog: * d-lang.cc (d_init_options): Set default -fextern-std= to C++17. * dmd/MERGE: Merge upstream dmd 93108bb9e. * gdc.texi (Runtime Options): Document the default for -fextern-std=. libphobos/ChangeLog: PR d/103604 * configure: Regenerate. * configure.ac (libtool_VERSION): Update to 3:0:0. * libdruntime/MERGE: Merge upstream druntime 6364e010. * src/MERGE: Merge upstream phobos 575b67a9b. * testsuite/libphobos.traits/all_satisfy.d: New test. * testsuite/libphobos.traits/traits.exp: New test.