CXX_MODULE_STDΒΆ
New in version 3.30.
CXX_MODULE_STD
is a boolean specifying whether the target may use
import std;
its C++ sources or not.
Note
This setting is meaningful only when experimental support for import
std;
has been enabled by the CMAKE_EXPERIMENTAL_CXX_IMPORT_STD
gate.
When this property is explicitly set to ON
, CMake will add a dependency to
a target which provides the C++ standard library's modules for the C++
standard applied to the target. This target is only applicable within the
current build and will not appear in the exported interfaces of the targets.
When consumed, these targets will be reapplied as necessary.
This property's value is not relevant for targets which disable scanning (see
CXX_SCAN_FOR_MODULES
). Additionally, this property only applies to
targets utilizing C++23 (cxx_std_23
) or newer.
The property supports
generator expressions
, however
expressions that depend upon the configuration, the consuming target, or the
linker language are not allowed. Whether a target uses import std
should
not depend upon such things as it is a static property of the target's source
code.
Targets which are exported with C++ module sources will have this property's resolved value exported.