CMP0065ΒΆ
New in version 3.4.
Do not add flags to export symbols from executables without
the ENABLE_EXPORTS target property.
CMake 3.3 and below, for historical reasons, always linked executables
on some platforms with flags like -rdynamic to export symbols from
the executables for use by any plugins they may load via dlopen.
CMake 3.4 and above prefer to do this only for executables that are
explicitly marked with the ENABLE_EXPORTS target property.
The OLD behavior of this policy is to always use the additional link
flags when linking executables regardless of the value of the
ENABLE_EXPORTS target property.
The NEW behavior of this policy is to only use the additional link
flags when linking executables if the ENABLE_EXPORTS target
property is set to True.
This policy was introduced in CMake version 3.4. Unlike most policies,
CMake version 3.19.8 does not warn by default when this policy
is not set and simply uses OLD behavior. See documentation of the
CMAKE_POLICY_WARNING_CMP0065
variable to control the warning.
Note
The OLD behavior of a policy is
deprecated by definition
and may be removed in a future version of CMake.