> On Apr 24, 2024, at 2:49 PM, Jakub Jelinek <ja...@redhat.com> wrote: > > On Wed, Apr 24, 2024 at 02:25:37PM -0700, Adrian Prantl via Dwarf-discuss > wrote: >> # C standard release dates for DW_AT_language_version, clarify semantics >> >> ## Background >> >> The list of languages at https://dwarfstd.org/languages-v6.html does not >> list release dates for the ISO C standard. Producers need to know what >> version numbers they should produce though. I scanned the ISO website for >> appropriate dates to use. >> >> ## Proposed Changes >> >> Augment the table of language encodings to add >> C (K&R and ISO) DW_LNAME_C 0x0003 0 YYYYMM >> >> K&R 000000 >> C89 198912 >> C99 199912 >> C11 201112 >> C17 201806 (sic!) >> C2x >201806 > > That is not correct. > C99 199901 > C11 201112 > C17 201710 > C23 202311
Thanks for correcting these! Do you happen to have a link to the source you used to look these up? > > C89 with ammendment 1 would be > 199409 > C89 likely that 198912 indeed. > > As for C++, the above page is missing > C++23 202302 >> >> Add the following non-normative wording: >> >> To convert a version number to a specific release, it is good practice to >> treat the YYYMM version numbers listed in this document as the maximum >> version that is interpreted as belonging to a specific release. > >> This way consumers can emit version numbers for unreleased upcoming >> specifications, by using, e.g., the date the compiler was built. > > That is not a good suggestion. > If a compiler supports some part of e.g. C23 but not everything, it should > be something larger than 201710 but smaller than 202311, even when the date > the compiler was built could be 202404 or later. > GCC and Clang up to 17 used e.g. 202000 for C23 partial implementations, > GCC still does, Clang 18+ now uses 202311. That is what I had in mind, but I didn't think about a compiler built after a standard was released. Do you have a suggestion for a better wording to capture that nuance? thanks, Adrian > > Jakub -- Dwarf-discuss mailing list Dwarf-discuss@lists.dwarfstd.org https://lists.dwarfstd.org/mailman/listinfo/dwarf-discuss
