gbe_fork/cmake/share/cmake-3.27/Help/policy/CMP0049.rst

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CMP0049
-------
Do not expand variables in target source entries.
CMake 2.8.12 and lower performed an extra layer of variable expansion
when evaluating source file names::
set(a_source foo.c)
add_executable(foo \${a_source})
.. note: no cmake highlighting since this syntax is deprecated
This was undocumented behavior.
The ``OLD`` behavior for this policy is to expand such variables when processing
the target sources. The ``NEW`` behavior for this policy is to issue an error
if such variables need to be expanded.
This policy was introduced in CMake version 3.0.
CMake version |release| warns when the policy is not set and uses
``OLD`` behavior. Use the :command:`cmake_policy` command to set
it to ``OLD`` or ``NEW`` explicitly.
.. include:: DEPRECATED.txt