## Summary of Changes
Add a new package computing the approximate Fréchet distance between two
polylines in dD under Euclidean metric, or decides if the distance is
smaller than a given value.
## Release Management
* Affected package(s): Frechet_distance
* Feature (if any):
[link](https://cgal.geometryfactory.com/CGAL/Members/wiki/Features/Frechet_Distance)
* License and copyright ownership: MPI, GeometryFactory, cnrs(?)
## TODO:
- [x] check branch size (@sloriot)
- [x] Make it work with `Epick_d<Dimension_tag<2>>` @sloriot
## Summary of Changes
`const` variables declared at global scope have internal linkage, and so
if they are declared in a header file, they are replicated in every file
that `#include` the header. They also can't be the target of `using`
declarations that exports the variable into a C++20 module. This change
marks a number of variables with `inline`, which gives these variables
external linkage, allows the linker to unify all of these variables
between different `.o` files, and also allows for their use in C++20
modules.
There is a separate question whether these variables could or should be
`constexpr` instead of just `const`. The difference between `constexpr`
and `const` has no effect on linkage, and so in the spirit of taking one
step at a time, this patch does not address the `constexpr` vs `const`
question.
This patch fixes#8871. Related to
https://github.com/dealii/dealii/issues/18071.
## Release Management
* Affected package(s): 5.6.1
* Issue(s) solved (if any): #8871
* License and copyright ownership: Same license as used throughout CGAL.
It is not clear to me that this is the right thing to do:
- it is done for some classes
- but in some test, a comment mention that it should be uninitialized
(the test works if init to -1 but not to 0).
- Base_time_stamper is doing an init to -2
## Summary of Changes
Update our CMake supported versions to ...3.31. That will suppress the
warnings about `CMP0167` (from CMake 3.30):
```
CMake Warning (dev) at cmake/modules/display-third-party-libs-versions.cmake:37 (find_package):
Policy CMP0167 is not set: The FindBoost module is removed. Run "cmake
--help-policy CMP0167" for policy details. Use the cmake_policy command to
set the policy and suppress this warning.
```
## Release Management
* Affected package(s): all cmake scripts
* License and copyright ownership: maintenance by GF
That will suppress the warnings about `CMP0167` (from CMake 3.30):
```
CMake Warning (dev) at cmake/modules/display-third-party-libs-versions.cmake:37 (find_package):
Policy CMP0167 is not set: The FindBoost module is removed. Run "cmake
--help-policy CMP0167" for policy details. Use the cmake_policy command to
set the policy and suppress this warning.
```
Sebastien Loriot
Laurent Rineau
Andreas Fabri
Wolfgang Bangerth
Mael Rouxel-Labbé
Jane Tournois
Sven Oesau