DWARF Version 6 Language and Version Codes
Note: The information on this page is part of the Draft of DWARF
Version 6. As an exception, the DW_AT_language_name (0x90) and
DW_AT_language_version (0x91) attributes, plus the DW_LNAME
constants listed on this page, are fixed (as are the default lower bounds
and version schemes). They may be used by DWARF Version 5 producers when
emitting a CU DIE. Such producers must still also emit a
DW_AT_language attribute as listed in
DWARF Language Codes.
Issue 210419.1
introduced a way to specify languages and versions separately,
and will be adopted for DWARF Version 6.
As described in the proposal, each supported language has a specified
value for DW_AT_language_name and each version of that language has a
unique DW_AT_language_version.
Issue 210514.1 introduced two additional version schemes.
New language codes may be added by submitting a request. See the Public Comment page.
Language Codes
| Language | Language Code (DW_AT_language_name) |
Value | Default Lower Bound | Version Scheme |
|---|---|---|---|---|
| ISO Ada | DW_LNAME_Ada |
0x0001 | 1 | YYYY |
| BLISS | DW_LNAME_BLISS |
0x0002 | 0 | |
| C (K&R and ISO) | DW_LNAME_C |
0x0003 | 0 | YYYYMM |
| ISO C++ | DW_LNAME_C_plus_plus |
0x0004 | 0 | YYYYMM |
| ISO Cobol | DW_LNAME_Cobol |
0x0005 | 1 | YYYY |
| Crystal | DW_LNAME_Crystal |
0x0006 | 0 | |
| D | DW_LNAME_D |
0x0007 | 0 | |
| Dylan | DW_LNAME_Dylan |
0x0008 | 0 | |
| ISO Fortran | DW_LNAME_Fortran |
0x0009 | 1 | YYYY |
| Go | DW_LNAME_Go |
0x000a | 0 | |
| Haskell | DW_LNAME_Haskell |
0x000b | 0 | |
| Java | DW_LNAME_Java |
0x000c | 0 | |
| Julia | DW_LNAME_Julia |
0x000d | 1 | |
| Kotlin | DW_LNAME_Kotlin |
0x000e | 0 | |
| Modula 2 | DW_LNAME_Modula2 |
0x000f | 1 | |
| Modula 3 | DW_LNAME_Modula3 |
0x0010 | 1 | |
| Objective C | DW_LNAME_ObjC |
0x0011 | 0 | YYYYMM |
| Objective C++ | DW_LNAME_ObjC_plus_plus |
0x0012 | 0 | YYYYMM |
| OCaml | DW_LNAME_OCaml |
0x0013 | 0 | |
| OpenCL C | DW_LNAME_OpenCL_C |
0x0014 | 0 | |
| ISO Pascal | DW_LNAME_Pascal |
0x0015 | 1 | YYYY |
| ANSI PL/I | DW_LNAME_PLI |
0x0016 | 1 | |
| Python | DW_LNAME_Python |
0x0017 | 0 | |
| RenderScript Kernel Language | DW_LNAME_RenderScript |
0x0018 | 0 | |
| Rust | DW_LNAME_Rust |
0x0019 | 0 | |
| Swift | DW_LNAME_Swift |
0x001a | 0 | VVMM |
| Unified Parallel C (UPC) | DW_LNAME_UPC |
0x001b | 0 | |
| Zig | DW_LNAME_Zig |
0x001c | 0 | |
| Assembly | DW_LNAME_Assembly |
0x001d | 0 | |
| C# | DW_LNAME_C_sharp |
0x001e | 0 | |
| Mojo | DW_LNAME_Mojo |
0x001f | 0 | |
| OpenGL Shading Language | DW_LNAME_GLSL |
0x0020 | 0 | VVMMPP |
| OpenGL ES Shading Language | DW_LNAME_GLSL_ES |
0x0021 | 0 | VVMMPP |
| High Level Shading Language | DW_LNAME_HLSL |
0x0022 | 0 | YYYY |
| OpenCL C++ | DW_LNAME_OpenCL_CPP |
0x0023 | 0 | VVMM |
| C++ for OpenCL | DW_LNAME_CPP_for_OpenCL |
0x0024 | 0 | VVMM |
| SYCL | DW_LNAME_SYCL |
0x0025 | 0 | YYYYRR |
| Ruby | DW_LNAME_Ruby |
0x0026 | 0 | VVMMPP |
| Move | DW_LNAME_Move |
0x0027 | 0 | YYYYMM |
| Hylo | DW_LNAME_Hylo |
0x0028 | 0 | |
| HIP | DW_LNAME_HIP |
0x0029 | 0 | |
| Odin | DW_LNAME_Odin |
0x002a | 0 | YYYYMM |
| P4 | DW_LNAME_P4 |
0x002b | 0 | VVMMPP |
| Metal | DW_LNAME_Metal |
0x002c | 0 | VVMMPP |
| V | DW_LNAME_V |
0x002d | 0 | VVMMPP |
| Algol 68 | DW_LNAME_Algol68 |
0x002e | 1 | YYYY |
Version Schemes
The version schemes listed above are explained in the following table.
The value of DW_AT_language_version is an integer value composed
from decimal values.
| Scheme | Encoding |
|---|---|
| YYYY | Year (YYYY) in which the language standard was ratified or released |
| YYYYMM | Year (YYYY) × 100 + month (MM) (e.g., 201703 for a standard ratified in March 2017) |
| YYYYRR | Year (YYYY) × 100 + revision number (RR) (e.g., 202007 for year 2020 revision 7) |
| VVMM | Major version number (VV) × 100 + minor version number (MM) (e.g., 306 for version 3.6) |
| VVMMPP | Major version number (VV) × 10,000 + minor version number (MM) × 100 + patch number (PP) (e.g., 30607 for version 3.6.7) |
Version Codes
Language version codes are supplied here for informative purposes only, and are not an official part of the DWARF specification. To add version codes for additional languages, please send a request via the Public Comment page.
Version codes (DW_AT_language_version) for C:
| C Version | DW_AT_language_version |
|---|---|
| K&R | 000000 |
| C89 | 198912 |
| C99 | 199901 |
| C11 | 201112 |
| C17 | 201710 |
| C23 | 202311 |
Version codes (DW_AT_language_version) for ISO C++:
| C++ Version | DW_AT_language_version |
|---|---|
| C++98 | 199711 |
| C++11 | 201103 |
| C++14 | 201402 |
| C++17 | 201703 |
| C++20 | 202002 |
| C++23 | 202302 |
