Yen-Chen Chen authored 1 month ago and Pradipta Samanta committed 1 month ago

## What is the bug
1. CMake warning pops up when one uses FetchContent without setting the download extract time stamp or CMake Policy 0135.
2. `libfortran-support` has been made public, but we are still fetching it via ssh.
## How do you fix it
Specify CMake Policy 0135, same as [here in test/fortran](https://gitlab.dkrz.de/icon-libraries/libiconmath/-/blob/main/test/fortran/CMakeLists.txt?ref_type=heads#L13-15

), fetch `libfortran-support` with https.

Merged-by: Pradipta Samanta <samanta@dkrz.de>
Changelog: bugfix