FindVTK: Drop this ancient compatibility module
The FindVTK module only existed to help find_package(VTK) calls work in old projects written to use "USE_VTK_FILE" instead of "VTK_USE_FILE". Drop it to allow find_package(VTK) calls to search for VTKConfig.cmake directly.
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.. cmake-module:: ../../Modules/FindVTK.cmake
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FindVTK
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-------
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This module no longer exists.
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This module existed in versions of CMake prior to 3.1, but became
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only a thin wrapper around ``find_package(VTK NO_MODULE)`` to
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provide compatibility for projects using long-outdated conventions.
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Now ``find_package(VTK)`` will search for ``VTKConfig.cmake``
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directly.
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#.rst:
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# FindVTK
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# -------
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#
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# Find a VTK installation or build tree.
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#
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# The following variables are set if VTK is found. If VTK is not found,
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# VTK_FOUND is set to false.
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#
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# ::
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#
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# VTK_FOUND - Set to true when VTK is found.
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#
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# The following cache entries must be set by the user to locate VTK:
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#
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# ::
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#
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# VTK_DIR - The directory containing VTKConfig.cmake.
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# This is either the root of the build tree,
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# or the lib/vtk directory. This is the
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# only cache entry.
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#
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# The following variables are set for backward compatibility and should
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# not be used in new code:
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#
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# ::
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#
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# USE_VTK_FILE - The full path to the UseVTK.cmake file.
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# This is provided for backward
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# compatibility. Use VTK_USE_FILE
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# instead.
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#=============================================================================
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# Copyright 2001-2014 Kitware, Inc.
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#
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# Distributed under the OSI-approved BSD License (the "License");
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# see accompanying file Copyright.txt for details.
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#
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# This software is distributed WITHOUT ANY WARRANTY; without even the
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# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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# See the License for more information.
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#=============================================================================
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# (To distribute this file outside of CMake, substitute the full
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# License text for the above reference.)
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# Use the Config mode of the find_package() command to find VTKConfig.
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# If this succeeds (possibly because VTK_DIR is already set), the
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# command will have already loaded VTKConfig.cmake and set VTK_FOUND.
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if(NOT VTK_FOUND)
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set(_VTK_REQUIRED "")
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if(VTK_FIND_REQUIRED)
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set(_VTK_REQUIRED REQUIRED)
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endif()
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set(_VTK_QUIET "")
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if(VTK_FIND_QUIETLY)
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set(_VTK_QUIET QUIET)
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endif()
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find_package(VTK ${_VTK_REQUIRED} ${_VTK_QUIET} NO_MODULE)
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unset(_VTK_REQUIRED)
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unset(_VTK_QUIET)
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endif()
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if(VTK_FOUND)
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# Set USE_VTK_FILE for backward-compatibility.
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set(USE_VTK_FILE ${VTK_USE_FILE})
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endif()
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