CMP0090ΒΆ
New in version 3.15.
export(PACKAGE)
does not populate package registry by default.
In CMake 3.14 and below the export(PACKAGE)
command populated the
user package registry by default and users needed to set the
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 export(PACKAGE)
does
nothing unless an explicit 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 export(PACKAGE)
command
to populate the user package registry unless
CMAKE_EXPORT_NO_PACKAGE_REGISTRY
is enabled.
The NEW
behavior is for export(PACKAGE)
command to do nothing
unless the CMAKE_EXPORT_PACKAGE_REGISTRY
is enabled.
This policy was introduced in CMake version 3.15. Use the
cmake_policy()
command to set it to OLD
or NEW
explicitly.
Unlike most policies, CMake version 3.27.9 does not warn
when this policy is not set and simply uses OLD
behavior.
Note
The OLD
behavior of a policy is
deprecated by definition
and may be removed in a future version of CMake.