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FindFLTK, FindFLTK2: Update documentation
- Modules documentation updated and syced. - Added examples section. - Mentioned FLTK upstream package configuration file that is also taken into account when calling the find_package(FLTK). - Briefly mentioned the fltk_wrap_ui() command. - Added note for FindFLTK2 that it is for the obsolete 2.x branch that wasn't released and FindFLTK should be used instead. Issue: #15728
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Peter Kokot
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FindFLTK
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--------
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Find the Fast Light Toolkit (FLTK) library
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Finds the Fast Light Toolkit (FLTK), a cross-platform toolkit for GUI
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development.
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Input Variables
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^^^^^^^^^^^^^^^
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FLTK uses CMake-based build system and provides a package configuration file for
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projects to find it. As of its 1.4.0 version it also provides
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:ref:`Imported Targets` that encapsulate usage requirements. For example,
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``fltk::fltk``, which can be linked to project targets where FLTK is needed.
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This module takes that into account and first attempts to find FLTK in
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*config mode*. If the configuration file is not available, it falls back to
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*module mode* and searches standard locations. See also to the official FLTK
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documentation for more information, how to use FLTK with CMake.
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By default this module will search for all of the FLTK components and
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add them to the ``FLTK_LIBRARIES`` variable. You can limit the components
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which get placed in ``FLTK_LIBRARIES`` by defining one or more of the
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following three options:
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``FLTK_SKIP_OPENGL``
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Set to true to disable searching for the FLTK GL library
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``FLTK_SKIP_FORMS``
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Set to true to disable searching for the FLTK Forms library
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``FLTK_SKIP_IMAGES``
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Set to true to disable searching for the FLTK Images library
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FLTK is composed also by a binary tool. You can set the following option:
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``FLTK_SKIP_FLUID``
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Set to true to not look for the FLUID binary
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.. versionadded:: 3.11
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Debug and Release library variants are found separately and use
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per-configuration variables.
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Result Variables
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^^^^^^^^^^^^^^^^
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The following variables will be defined:
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This module defines the following variables:
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``FLTK_FOUND``
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True if all components not skipped were found
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``FLTK_INCLUDE_DIR``
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Path to the include directory for FLTK header files
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Boolean indicating whether FLTK is found.
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``FLTK_LIBRARIES``
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List of the FLTK libraries found
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``FLTK_FLUID_EXECUTABLE``
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Path to the FLUID binary tool
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Libraries needed to link against to use FLTK.
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``FLTK_WRAP_UI``
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True if FLUID is found, used to enable the FLTK_WRAP_UI command
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Boolean indicating whether the ``fluid`` executable is found. This variable
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is available only if FLTK is found in *module mode* and can be used, for
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example, to conditionally invoke the :command:`fltk_wrap_ui` command if it is
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needed and available.
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Cache Variables
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^^^^^^^^^^^^^^^
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The following cache variables are also available to set or use:
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``FLTK_FLUID_EXECUTABLE``
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The path to the ``fluid`` binary tool.
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``FLTK_INCLUDE_DIR``
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The include directory containing header files needed to use FLTK.
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``FLTK_BASE_LIBRARY_RELEASE``
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The FLTK base library (optimized)
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.. versionadded:: 3.11
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The path to the release (optimized) FLTK base library.
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``FLTK_BASE_LIBRARY_DEBUG``
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The FLTK base library (debug)
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.. versionadded:: 3.11
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The path to the debug FLTK base library.
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``FLTK_GL_LIBRARY_RELEASE``
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The FLTK GL library (optimized)
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.. versionadded:: 3.11
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The path to the release (optimized) FLTK GL library.
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``FLTK_GL_LIBRARY_DEBUG``
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The FLTK GL library (debug)
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.. versionadded:: 3.11
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The path to the debug FLTK GL library.
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``FLTK_FORMS_LIBRARY_RELEASE``
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The FLTK Forms library (optimized)
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.. versionadded:: 3.11
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The path to the release (optimized) FLTK Forms library.
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``FLTK_FORMS_LIBRARY_DEBUG``
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The FLTK Forms library (debug)
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.. versionadded:: 3.11
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The path to the debug FLTK Forms library.
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``FLTK_IMAGES_LIBRARY_RELEASE``
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The FLTK Images protobuf library (optimized)
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.. versionadded:: 3.11
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The path to the release (optimized) FLTK Images protobuf library.
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``FLTK_IMAGES_LIBRARY_DEBUG``
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The FLTK Images library (debug)
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.. versionadded:: 3.11
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.. versionadded:: 3.11
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Debug and Release variants are found separately and use per-configuration
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variables.
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The path to the debug FLTK Images library.
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Input Variables
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^^^^^^^^^^^^^^^
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By default, this module searches for all FLTK libraries and its ``fluid``
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executable. The following variables can be set before calling
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``find_package(FLTK)`` to indicate which elements are optional for a successful
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configuration:
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``FLTK_SKIP_FLUID``
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Set to boolean true to mark the ``fluid`` executable as optional.
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``FLTK_SKIP_FORMS``
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Set to boolean true to mark the FLTK Forms library as optional; it will
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therefore not be included in the ``FLTK_LIBRARIES`` result variable.
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``FLTK_SKIP_IMAGES``
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Set to boolean true to mark the FLTK Image library as optional; it will
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therefore not be included in the ``FLTK_LIBRARIES`` result variable.
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``FLTK_SKIP_OPENGL``
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Set to boolean true to mark the FLTK OpenGL library as optional; it will
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therefore not be included in the ``FLTK_LIBRARIES`` result variable.
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Examples
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^^^^^^^^
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Finding FLTK and conditionally creating a ``fltk::fltk`` imported interface
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target, if it is not provided by the upstream FLTK package. Imported target can
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then be linked to a project target:
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.. code-block:: cmake
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find_package(FLTK)
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if(FLTK_FOUND AND NOT TARGET fltk::fltk)
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add_library(fltk::fltk INTERFACE IMPORTED)
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set_target_properties(
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fltk::fltk
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PROPERTIES
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INTERFACE_INCLUDE_DIRECTORIES "${FLTK_INCLUDE_DIR}"
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INTERFACE_LINK_LIBRARIES "${FLTK_LIBRARIES}"
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)
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endif()
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target_link_libraries(project_target PRIVATE fltk::fltk)
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#]=======================================================================]
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if(NOT FLTK_SKIP_OPENGL)
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@ -5,25 +5,66 @@
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FindFLTK2
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---------
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Find the native FLTK 2.0 includes and library
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.. note::
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The following settings are defined
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This module is specifically for FLTK version 2.x. The 2.0 series was
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originally a development branch intended as the next major version of FLTK.
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However, it never reached stable release status, and active development has
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shifted back to the FLTK 1.x branch. For finding FLTK, including stable and
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modern versions, use the :module:`FindFLTK` module instead.
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::
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Finds the Fast Light Toolkit (FLTK) version 2.x, a cross-platform toolkit for
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GUI development.
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FLTK2_FLUID_EXECUTABLE, where to find the Fluid tool
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FLTK2_WRAP_UI, This enables the FLTK2_WRAP_UI command
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FLTK2_INCLUDE_DIR, where to find include files
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FLTK2_LIBRARIES, list of fltk2 libraries
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FLTK2_FOUND, Don't use FLTK2 if false.
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Result Variables
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^^^^^^^^^^^^^^^^
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The following settings should not be used in general.
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This module defines the following variables:
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::
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``FLTK2_FOUND``
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Boolean indicating whether FLTK 2.x is found.
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FLTK2_BASE_LIBRARY = the full path to fltk2.lib
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FLTK2_GL_LIBRARY = the full path to fltk2_gl.lib
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FLTK2_IMAGES_LIBRARY = the full path to fltk2_images.lib
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``FLTK2_LIBRARIES``
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Libraries needed to link against to use FLTK 2.x.
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``FLTK2_WRAP_UI``
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Boolean indicating whether the ``fluid2`` executable is found. This variable
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can be used, for example, to conditionally invoke the :command:`fltk_wrap_ui`
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command if it is needed and available.
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Cache Variables
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^^^^^^^^^^^^^^^
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The following cache variables may also be set:
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``FLTK2_FLUID_EXECUTABLE``
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The path to the ``fluid2`` binary tool.
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``FLTK2_INCLUDE_DIR``
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The directory containing header files needed to use FLTK 2.x.
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``FLTK2_BASE_LIBRARY``
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The path to the FLTK 2.x library (``fltk2``).
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``FLTK2_GL_LIBRARY``
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The path to the FLTK 2.x OpenGL compatibility library (``fltk2_gl``).
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``FLTK2_IMAGES_LIBRARY``
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The path to the FLTK 2.x Images library (``fltk2_images``).
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Examples
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^^^^^^^^
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Finding FLTK version 2:
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.. code-block:: cmake
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find_package(FLTK2)
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See Also
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^^^^^^^^
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* The :module:`FindFLTK` module to find FLTK in a version-agnostic way.
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#]=======================================================================]
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set (FLTK2_DIR $ENV{FLTK2_DIR} )
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