[unuran] download from LCG instead of bundle builtin and use CMake target

[ferdymercury]

Variant of #21938 but using LCG link

[github-actions]

Test Results

    23 files      23 suites   3d 15h 37m 53s ⏱️
 3 876 tests  3 827 ✅   0 💤 49 ❌
78 546 runs  78 222 ✅ 275 💤 49 ❌

For more details on these failures, see this check.

Results for commit b48ba54.

♻️ This comment has been updated with latest results.

[ferdymercury]

gentle ping @lmoneta

[dpiparo]

thanks for these changes.
The only difference between unuran and other packages now not in source, e.g. lzma, is that it is not installable on linux and mac: indeed unuran is not present in Homebrew. This is not a blocker, but certainly something that introduces a symmetry, requiring always to have an internet connection on mac, because it is not possible to install locally all ROOT dependencies (unuran does not exist in brew)

[ferdymercury]

Yep, libunuran-dev exists on latest ubuntu and unuran-devel exists on alma, but not on homebrew for mac.
Do we know of someone with experience with homebrew that could be willing to give it a try to adding a formula for it so that we can restore symmetry? Maybe @henryiii ?

[ferdymercury]

mac: indeed unuran is not present in Homebrew.

I just proposed a new homebrew formula: Homebrew/homebrew-core#288800

[ferdymercury]

Formula merged! So unuran is now part of homebrew.

[guitargeek]

Thank you very much! This is a strict improvement over shipping the sources in a tar ball.