<LANG>_EXTENSIONSΒΆ
The variations are:
These properties specify whether compiler-specific extensions are requested.
These properties are initialized by the value of the
CMAKE_<LANG>_EXTENSIONS variable if it is set when a target is
created and otherwise by the value of
CMAKE_<LANG>_EXTENSIONS_DEFAULT (see CMP0128).
For supported CMake versions see the respective pages.
To control language standard versions see <LANG>_STANDARD.
See the cmake-compile-features(7) manual for information on
compile features and a list of supported compilers.