Languages compiled into an IMPORTED static library.
Set this to the list of languages of source files compiled to produce
a STATIC IMPORTED library (such as “C” or “CXX”). CMake accounts for
these languages when computing how to link a target to the imported
library. For example, when a C executable links to an imported C++
static library CMake chooses the C++ linker to satisfy language
runtime dependencies of the static library.
This property is ignored for targets that are not STATIC libraries.
This property is ignored for non-imported targets.