| CMP0208 |
| ------- |
| |
| .. versionadded:: 4.3 |
| |
| :command:`export(EXPORT)` does not allow empty arguments. |
| |
| In CMake 4.2 and below, the :command:`export(EXPORT)` command silently |
| accepted ``NAMESPACE``, ``FILE`` or ``CXX_MODULES_DIRECTORY`` arguments with |
| empty or missing values. |
| |
| CMake 4.3 and above issue a diagnostic if any of these keywords are present |
| without an associated value, or of the value given to ``FILE`` or |
| ``CXX_MODULES_DIRECTORY`` is empty. (``NAMESPACE`` is allowed to have an empty |
| value, but an empty value must be quoted.) A diagnostic is also issued |
| immediately if the value of ``EXPORT`` is missing or empty. (Previously, this |
| would result in an error at generate-time because no export set whose name is |
| empty can exist.) |
| |
| This policy provides compatibility with projects which may have relied on the |
| previous lack of enforcement. The ``OLD`` behavior for this policy permits |
| these keywords to be present without an accompanying value, or to be given an |
| empty value. The ``NEW`` behavior requires that a value be given, and that |
| the value (except for ``NAMESPACE``) is non-empty. |
| |
| .. |INTRODUCED_IN_CMAKE_VERSION| replace:: 4.3 |
| .. |WARNS_OR_DOES_NOT_WARN| replace:: warns |
| .. include:: include/STANDARD_ADVICE.rst |
| |
| .. include:: include/DEPRECATED.rst |
