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Avoid CMake developer warning related to OpenGL/CMP0072

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Newer CMake versions warn if CMake policy CMP0072 is not set. We're
using "legacy mode" since we use FindOpenGL with `OPENGL_LIBRARIES`
and not (yet) the `OpenGL::GL` target.

See https://cmake.org/cmake/help/latest/policy/CMP0072.html
This commit is contained in:
Albrecht Schlosser 2020-09-18 18:07:18 +02:00
parent 360040d0bf
commit caf0bfa81d
1 changed files with 9 additions and 0 deletions
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9
CMakeLists.txt
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@ -28,6 +28,15 @@
# Minimum CMake version required by FLTK 1.4 (06/2020, work in progress)
cmake_minimum_required (VERSION 3.2.3 FATAL_ERROR)
# Use "legacy mode" of FindOpenGL (avoid CMake developer warning)
# Note: we're using FindOpenGL with `OPENGL_LIBRARIES` and not (yet)
# the `OpenGL::GL` target. May be changed in the future.
# See https://cmake.org/cmake/help/latest/policy/CMP0072.html
if (POLICY CMP0072)
cmake_policy (SET CMP0072 OLD)
endif ()
#######################################################################
# define the FLTK project and version
#######################################################################