| Ryan Prichard | 7aea7e9 | 2022-01-13 17:30:17 -0800 | [diff] [blame] | 1 | enable_language |
| 2 | --------------- |
| 3 | Enable a language (CXX/C/OBJC/OBJCXX/Fortran/etc) |
| 4 | |
| 5 | .. code-block:: cmake |
| 6 | |
| 7 | enable_language(<lang> [OPTIONAL] ) |
| 8 | |
| 9 | Enables support for the named language in CMake. This is |
| 10 | the same as the :command:`project` command but does not create any of the extra |
| 11 | variables that are created by the project command. Example languages |
| 12 | are ``CXX``, ``C``, ``CUDA``, ``OBJC``, ``OBJCXX``, ``Fortran``, |
| 13 | ``HIP``, ``ISPC``, and ``ASM``. |
| 14 | |
| 15 | .. versionadded:: 3.8 |
| 16 | Added ``CUDA`` support. |
| 17 | |
| 18 | .. versionadded:: 3.16 |
| 19 | Added ``OBJC`` and ``OBJCXX`` support. |
| 20 | |
| 21 | .. versionadded:: 3.18 |
| 22 | Added ``ISPC`` support. |
| 23 | |
| 24 | .. versionadded:: 3.21 |
| 25 | Added ``HIP`` support. |
| 26 | |
| 27 | If enabling ``ASM``, enable it last so that CMake can check whether |
| 28 | compilers for other languages like ``C`` work for assembly too. |
| 29 | |
| 30 | This command must be called in file scope, not in a function call. |
| 31 | Furthermore, it must be called in the highest directory common to all |
| 32 | targets using the named language directly for compiling sources or |
| 33 | indirectly through link dependencies. It is simplest to enable all |
| 34 | needed languages in the top-level directory of a project. |
| 35 | |
| 36 | The ``OPTIONAL`` keyword is a placeholder for future implementation and |
| 37 | does not currently work. Instead you can use the :module:`CheckLanguage` |
| 38 | module to verify support before enabling. |