CMP0192ΒΆ
Added in version 4.1.
GNUInstallDirs uses absolute SYSCONFDIR, LOCALSTATEDIR,
and RUNSTATEDIR in special prefixes.
The GNUInstallDirs module documents
special cases
for SYSCONFDIR, LOCALSTATEDIR, and RUNSTATEDIR.
When CMAKE_INSTALL_PREFIX is a special prefix, e.g., /usr,
the absolute paths for these directories may be outside the prefix, e.g.,
/etc, /var, and /var/run.
In CMake 4.0 and below, the default values for the CMAKE_INSTALL_<dir>
variables, for <dir> equal to SYSCONFDIR, LOCALSTATEDIR, and
RUNSTATEDIR, always used relative paths (etc, var, var/run),
and the special cases were implemented only when computing absolute paths
for the CMAKE_INSTALL_FULL_<dir> variables.
CMake 4.1 and above prefer to default CMAKE_INSTALL_<dir> variables to
absolute paths, for <dir> equal to SYSCONFDIR, LOCALSTATEDIR,
and RUNSTATEDIR, when CMAKE_INSTALL_PREFIX is a special
prefix. This policy provides compatibility for projects that have not
been updated to expect this behavior.
The OLD behavior for this policy is to default CMAKE_INSTALL_<dir>
variables to relative paths. The NEW behavior for this policy is to
default CMAKE_INSTALL_<dir> variables to absolute paths, for <dir>
equal to SYSCONFDIR, LOCALSTATEDIR, and RUNSTATEDIR, when
CMAKE_INSTALL_PREFIX is a special prefix.
This policy takes effect at the first call of include(GNUInstallDirs).
Subsequent calls of include(GNUInstallDirs) reuse cached
CMAKE_INSTALL_<dir> values from the first call.
This policy was introduced in CMake version 4.1.
It may be set by cmake_policy() or cmake_minimum_required().
If it is not set, CMake does not warn, 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.