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+The Computational Geometry Algorithms Library (CGAL) provides
+efficient and reliable geometric algorithms in the form of a C++
+library. CGAL is used in various areas needing geometric computation,
+such as computer graphics, scientific visualization, computer aided
+design and modelling, geographic information systems, molecular
+biology, medical imaging, robotics and motion planning, mesh generation
+and numerical methods.
+
+Since version 5.0, GGAL is a header-only library and does not need to
+be compiled. This package contains a version greater than 4.x, required
+by some packages (for example SFCGAL version 1.4.x). It conflicts with
+versions earlier than 5.0, hence CGAL5 is an alternative that cannot
+coexist with the package CGAL also available in this repository.
+
+Packages that depend on CGAL may be incompatible with CGAL5 and vice
+versa. Please make sure which package you really need, depending on the
+software installed or to be installed on your system.