Help/envvar/SWIFTC.rst
.. versionadded:: 3.15
.. include:: include/ENV_VAR.rst
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"