Added as Issue 240424.2 <https://dwarfstd.org/issues/240424.2.html>, with Jakub's corrections.
-cary On Wed, Apr 24, 2024 at 2:50 PM Jakub Jelinek via Dwarf-discuss < dwarf-discuss@lists.dwarfstd.org> 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 > > 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. > > Jakub > > -- > Dwarf-discuss mailing list > Dwarf-discuss@lists.dwarfstd.org > https://lists.dwarfstd.org/mailman/listinfo/dwarf-discuss >
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