Add LLVM toolchain support for Boost

[Zeldhoron]

edit: requires:

• Implementing a new LLVM based toolchain easybuild-framework#4914

[Thyre]

Test with LLVM toolchain built on top of 2025b

---

Test report by @Thyre

Overview of tested easyconfigs (in order)

• SUCCESS Boost-1.88.0-llvm-compilers-20.1.8.eb

Build succeeded for 1 out of 1 (total: 8 mins 39 secs) (1 easyconfigs in total)
ZAM054 - Linux Zorin OS 18, x86_64, 12th Gen Intel(R) Core(TM) i7-1260P (skylake), 1 x NVIDIA NVIDIA GeForce MX550, 580.95.05, Python 3.12.3
See https://gist.github.com/Thyre/f87529c5a5e8f2d2e16f94ea31cef68d for a full test report.

[boegel]

Test report by @boegel

Overview of tested easyconfigs (in order)

• SUCCESS Boost-1.81.0-GCC-12.2.0.eb
• SUCCESS Boost-1.88.0-GCC-14.3.0.eb

Build succeeded for 2 out of 2 (total: 16 mins 9 secs) (2 easyconfigs in total)
node4228.shinx.os - Linux RHEL 9.6, x86_64, AMD EPYC 9654 96-Core Processor (zen4), Python 3.9.21
See https://gist.github.com/boegel/c8bfe78e312ea9421de9a144ee55557b for a full test report.

[boegel]

lgtm

[boegel]

@boegelbot please test @ jsc-zen3
EB_ARGS="--installpath /tmp/$USER/pr3855 Boost-1.82.0-GCC-12.3.0.eb Boost-1.88.0-intel-compilers-2025.2.0.eb"

[boegelbot]

@boegel: Request for testing this PR well received on jsczen3l1.int.jsc-zen3.fz-juelich.de

PR test command 'if [[ develop != 'develop' ]]; then EB_BRANCH=develop ./easybuild_develop.sh 2> /dev/null 1>&2; EB_PREFIX=/home/boegelbot/easybuild/develop source init_env_easybuild_develop.sh; fi; EB_PR=3855 EB_ARGS="--installpath /tmp/$USER/pr3855 Boost-1.82.0-GCC-12.3.0.eb Boost-1.88.0-intel-compilers-2025.2.0.eb" EB_CONTAINER= EB_REPO=easybuild-easyblocks EB_BRANCH=develop /opt/software/slurm/bin/sbatch --job-name test_PR_3855 --ntasks=8 ~/boegelbot/eb_from_pr_upload_jsc-zen3.sh' executed!

• exit code: 0
• output:

Submitted batch job 9024

Test results coming soon (I hope)...

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Message to humans: this is just bookkeeping information for me,
it is of no use to you (unless you think I have a bug, which I don't).

[boegelbot]

Test report by @boegelbot

Overview of tested easyconfigs (in order)

• SUCCESS Boost-1.82.0-GCC-12.3.0.eb
• SUCCESS Boost-1.88.0-intel-compilers-2025.2.0.eb

Build succeeded for 2 out of 2 (total: 18 mins 37 secs) (2 easyconfigs in total)
jsczen3c3.int.jsc-zen3.fz-juelich.de - Linux Rocky Linux 9.6, x86_64, AMD EPYC-Milan Processor (zen3), Python 3.9.21
See https://gist.github.com/boegelbot/7df37239d95498607570a6a5c19b2814 for a full test report.