| CMAKE_<LANG>_COMPILER_FRONTEND_VARIANT |
| -------------------------------------- |
| |
| .. versionadded:: 3.14 |
| |
| Identification string of the compiler frontend variant. |
| |
| Some compilers have multiple, different frontends for accepting command |
| line options. (For example ``Clang`` originally only had a frontend |
| compatible with the ``GNU`` compiler but since its port to Windows |
| (``Clang-Cl``) it now also supports a frontend compatible with ``MSVC``.) |
| When CMake detects such a compiler it sets this |
| variable to what would have been the :variable:`CMAKE_<LANG>_COMPILER_ID` for |
| the compiler whose frontend it resembles. |
| |
| .. note:: |
| In other words, this variable describes what command line options |
| and language extensions the compiler frontend expects. |
| |
| .. versionchanged:: 3.26 |
| This variable is set for ``GNU``, ``MSVC``, and ``AppleClang`` |
| compilers that have only one frontend variant. |
