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Diffstat (limited to 'Help/policy/CMP0090.rst')
| -rw-r--r-- | Help/policy/CMP0090.rst | 27 |
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diff --git a/Help/policy/CMP0090.rst b/Help/policy/CMP0090.rst new file mode 100644 index 0000000..720c17c --- /dev/null +++ b/Help/policy/CMP0090.rst @@ -0,0 +1,27 @@ +CMP0090 +------- + +:command:`export(PACKAGE)` does not populate package registry by default. + +In CMake 3.14 and below the :command:`export(PACKAGE)` command populated the +user package registry by default and users needed to set the +:variable:`CMAKE_EXPORT_NO_PACKAGE_REGISTRY` to disable it, e.g. in automated +build and packaging environments. Since the user package registry is stored +outside the build tree, this side effect should not be enabled by default. +Therefore CMake 3.15 and above prefer that :command:`export(PACKAGE)` does +nothing unless an explicit :variable:`CMAKE_EXPORT_PACKAGE_REGISTRY` variable +is set to enable it. This policy provides compatibility with projects that +have not been updated. + +The ``OLD`` behavior for this policy is for :command:`export(PACKAGE)` command +to populate the user package registry unless +:variable:`CMAKE_EXPORT_NO_PACKAGE_REGISTRY` is enabled. +The ``NEW`` behavior is for :command:`export(PACKAGE)` command to do nothing +unless the :variable:`CMAKE_EXPORT_PACKAGE_REGISTRY` is enabled. + +This policy was introduced in CMake version 3.15. Use the +:command:`cmake_policy` command to set it to ``OLD`` or ``NEW`` explicitly. +Unlike most policies, CMake version |release| does *not* warn +when this policy is not set and simply uses ``OLD`` behavior. + +.. include:: DEPRECATED.txt |