consistently use system toolchain in EasyBuild easyconfigs

[boegel]

(created using eb --new-pr)

We were sticking to use the dummy toolchain, which is essentially a deprecated alias for system, to facilitate updating from EasyBuild 3.x (which does not know about the system toolchain yet) to EasyBuild 4.x .

The latest EasyBuild User Survey shows that only a very small minority (~2%) is still using EasyBuild 3.x, so the time has come to clean this up...

closes #10404

[boegel]

@boegelbot please test @ generoso
EB_ARGS="EasyBuild-4.0.0.eb EasyBuild-4.0.1.eb EasyBuild-4.1.0.eb EasyBuild-4.1.1.eb EasyBuild-4.1.2.eb EasyBuild-4.2.0.eb EasyBuild-4.2.1.eb EasyBuild-4.2.2.eb EasyBuild-4.3.0.eb EasyBuild-4.3.1.eb EasyBuild-4.3.2.eb EasyBuild-4.3.3.eb EasyBuild-4.3.4.eb EasyBuild-4.4.0.eb EasyBuild-4.4.1.eb EasyBuild-4.4.2.eb EasyBuild-4.5.0.eb EasyBuild-4.5.1.eb EasyBuild-4.5.2.eb EasyBuild-4.5.3.eb"

[boegelbot]

@boegel: Request for testing this PR well received on login1

PR test command 'EB_PR=15126 EB_ARGS="EasyBuild-4.0.0.eb EasyBuild-4.0.1.eb EasyBuild-4.1.0.eb EasyBuild-4.1.1.eb EasyBuild-4.1.2.eb EasyBuild-4.2.0.eb EasyBuild-4.2.1.eb EasyBuild-4.2.2.eb EasyBuild-4.3.0.eb EasyBuild-4.3.1.eb EasyBuild-4.3.2.eb EasyBuild-4.3.3.eb EasyBuild-4.3.4.eb EasyBuild-4.4.0.eb EasyBuild-4.4.1.eb EasyBuild-4.4.2.eb EasyBuild-4.5.0.eb EasyBuild-4.5.1.eb EasyBuild-4.5.2.eb EasyBuild-4.5.3.eb" /opt/software/slurm/bin/sbatch --job-name test_PR_15126 --ntasks=4 ~/boegelbot/eb_from_pr_upload_generoso.sh' executed!

• exit code: 0
• output:

Submitted batch job 8274

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).

[branfosj]

We should cleanup the dummy toolchain check in the testsuite: https://github.com/easybuilders/easybuild-easyconfigs/blob/develop/test/easyconfigs/easyconfigs.py#L1216 to remove the exception for these easyconfigs.

[boegel]

@branfosj Good point, fixed in 2b0d51441d691dab9d9726e9896f3fa9de0922a4

[boegelbot]

Test report by @boegelbot
SUCCESS
Build succeeded for 20 out of 20 (20 easyconfigs in total)
cns1 - Linux Rocky Linux 8.5, x86_64, Intel(R) Xeon(R) CPU E5-2667 v3 @ 3.20GHz (haswell), Python 3.6.8
See https://gist.github.com/b8f053f42a196a1aa3b2a763e4da36ff for a full test report.

[boegel]

Test report by @boegel
SUCCESS
Build succeeded for 21 out of 21 (21 easyconfigs in total)
node2671.swalot.os - Linux CentOS Linux 7.9.2009, x86_64, Intel(R) Xeon(R) CPU E5-2660 v3 @ 2.60GHz (haswell), Python 2.7.5
See https://gist.github.com/e7a8b4557033b39d66f131a7b2d5983a for a full test report.

[branfosj]

lgtm

[branfosj]

Going in, thanks @boegel!