| SWIFTC | |
| ------ | |
| .. versionadded:: 3.15 | |
| .. include:: ENV_VAR.txt | |
| Preferred executable for compiling ``Swift`` language files. Will only be used by | |
| CMake on the first configuration to determine ``Swift`` compiler, after which the | |
| value for ``SWIFTC`` is stored in the cache as | |
| :variable:`CMAKE_Swift_COMPILER <CMAKE_<LANG>_COMPILER>`. For any configuration run | |
| (including the first), the environment variable will be ignored if the | |
| :variable:`CMAKE_Swift_COMPILER <CMAKE_<LANG>_COMPILER>` variable is defined. | |
| .. note:: | |
| Options that are required to make the compiler work correctly can be included; | |
| they can not be changed. | |
| .. code-block:: console | |
| $ export SWIFTC="custom-compiler --arg1 --arg2" |