CMAKE_<LANG>_COMPILER_FRONTEND_VARIANTΒΆ
New in version 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 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.
Changed in version 3.26: This variable is set for GNU, MSVC, and AppleClang
compilers that have only one frontend variant.