File: CMP0049.rst

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CMP0049
-------

.. |REMOVED_IN_CMAKE_VERSION| replace:: 4.0
.. include:: include/REMOVED_PROLOGUE.rst

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.

.. |INTRODUCED_IN_CMAKE_VERSION| replace:: 3.0
.. |WARNED_OR_DID_NOT_WARN| replace:: warned
.. include:: include/REMOVED_EPILOGUE.rst