- only search for Boost if extra Boost components are required,
- do not test `Boost_FOUND` (because Boost is `REQUIRED` in
`find_package`),
- use Boost imported targets instead of variable (compatibility with
Boost-1.70 CMake config mode)
As CGAL is `REQUIRED` in `find_package`, no test of `CGAL_FOUND` can
be done, if `CGAL_FOUND` is not `TRUE`, then CMake stops with a hard
error at the line `find_package(CGAL REQUIRED ...)`.
Rationale: cgal_create_CMakeLists and related scripts used to not
consider files ending on anything else than .cpp or .C as C++ sources.
This patch allows for the list of extensions considered as C++ source
files as stated in the g++ man page.
Taucs, Lapack and Blas supports are no longer tested
Approved by the Release Manager
Tested in CGAL-4.5-Ic-97
Conflicts:
Polyhedron/demo/Polyhedron/CMakeLists.txt
removed almost all occurenced (missing UseFiles). While
doing so, some CMakeLists.txt could also be simplified. In fact
many more CMakeLists.txt can be simplified, in one of two ways:
1) add external libs to CGAL_3RD_PARTY_LIBRARIES and
2) call cgal_create_single_source_program