ISPC

.. versionadded:: 3.19

.. include:: include/ENV_VAR.rst

Preferred executable for compiling ISPC language files. Will only be used by CMake on the first configuration to determine ISPC compiler, after which the value for ISPC is stored in the cache as :variable:CMAKE_ISPC_COMPILER <CMAKE_<LANG>_COMPILER>. For any configuration run (including the first), the environment variable will be ignored if the :variable:CMAKE_ISPC_COMPILER <CMAKE_<LANG>_COMPILER> variable is defined.