# 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 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. ## Dependencies Issue 210419.1 ## References https://iso-9899.info/wiki/The_Standard C89: https://www.iso.org/standard/17782.html C99: https://www.iso.org/standard/29237.html C11: https://www.iso.org/standard/57853.html C17: https://www.iso.org/standard/74528.html https://dwarfstd.org/languages-v6.html -- Dwarf-discuss mailing list Dwarf-discuss@lists.dwarfstd.org https://lists.dwarfstd.org/mailman/listinfo/dwarf-discuss
