Boolean specifying whether compiler specific extensions are requested.
This property specifies whether compiler specific extensions should be
used. For some compilers, this results in adding a flag such
-std=gnu11 instead of
-std=c11 to the compile line. This
ON by default. The basic C standard level is
controlled by the
C_STANDARD target property.
cmake-compile-features(7) manual for information on
compile features and a list of supported compilers.
This property is initialized by the value of
CMAKE_C_EXTENSIONS variable if it is set when a target