CMP0009ΒΆ
FILE GLOB_RECURSE calls should not follow symlinks by default.
In CMake 2.6.1 and below, file(GLOB_RECURSE) calls would follow
through symlinks, sometimes coming up with unexpectedly large result sets
because of symlinks to top level directories that contain hundreds of
thousands of files.
This policy determines whether or not to follow symlinks encountered
during a file(GLOB_RECURSE) call. The OLD behavior for this
policy is to follow the symlinks. The NEW behavior for this policy is not
to follow the symlinks by default, but only if FOLLOW_SYMLINKS is given
as an additional argument to the FILE command.
This policy was introduced in CMake version 2.6.2.
It may be set by cmake_policy() or cmake_minimum_required().
If it is not set, CMake warns, and uses OLD behavior.
Note
The OLD behavior of a policy is
deprecated by definition
and may be removed in a future version of CMake.