Enable languages (CXX/C/OBJC/OBJCXX/Fortran/etc)
Enables support for the named languages in CMake. This is the same as
project() command but does not create any of the extra
variables that are created by the project command.
Supported languages are
CXX (i.e. C++),
CSharp (i.e. C#),
OBJC (i.e. Objective-C),
OBJCXX (i.e. Objective-C++),
New in version 3.8: Added
New in version 3.15: Added
New in version 3.16: Added
New in version 3.18: Added
New in version 3.21: Added
New in version 3.26: Added
ASM, list it last so that CMake can check whether
compilers for other languages like
C work for assembly too.
This command must be called in file scope, not in a function call. Furthermore, it must be called in the highest directory common to all targets using the named language directly for compiling sources or indirectly through link dependencies. It is simplest to enable all needed languages in the top-level directory of a project.
OPTIONAL keyword is a placeholder for future implementation and
does not currently work. Instead you can use the
module to verify support before enabling.