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enhance custom easyblocks for SCOTCH & MUMPS to add lfoss toolchain support#4069

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hattom:scotch_llvm
Apr 8, 2026
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enhance custom easyblocks for SCOTCH & MUMPS to add lfoss toolchain support#4069
boegel merged 2 commits intoeasybuilders:developfrom
hattom:scotch_llvm

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@hattom hattom commented Feb 18, 2026

SCOTCH's Easyblock had two sections which explicitly depended on the toolchain:
The first was for the name of the Makefile:

if intel:
 ...
elif GCC:
 ...
else:
 raise ...

The other was for the restrict keyword:

if GCC:
  ...
else
  ...

For both cases, add LLVM to the GCC behaviour, and modify the syntax to match in both cases (compiler order, raise if else, define a comp_fam variable)

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hattom commented Feb 18, 2026 •
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A generalization to support also NVHPC is left as a future exercise, but would presumably follow exactly the same pattern.

@hattom hattom changed the title SCOTCH: update easyblock for LLVM toolchain Update to easyblocks to add lfoss toolchain support [SCOTCH/MUMPS] Feb 18, 2026
@hattom hattom mentioned this pull request Feb 18, 2026
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hattom commented Feb 18, 2026

btw -- I'm working my way through to get PETSc building. These are the problems that I've found so far, but I'm not finished yet (building python etc is taking a very long time).

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Micket commented Mar 21, 2026

ci stuck

@Micket Micket closed this Mar 21, 2026
@Micket Micket reopened this Mar 21, 2026
@boegel boegel changed the title Update to easyblocks to add lfoss toolchain support [SCOTCH/MUMPS] enhance custom easyblocks for SCOTCH & MUMPS to add lfoss toolchain support Mar 25, 2026
@boegel boegel added this to the next release (5.2.2?) milestone Mar 25, 2026
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boegel commented Apr 8, 2026

Test report by @boegel

Overview of tested easyconfigs (in order)

  • SUCCESS MUMPS-5.8.1-foss-2025b-metis.eb

  • SUCCESS SCOTCH-7.0.4-iimpi-2023b.eb

  • SUCCESS SCOTCH-7.0.8-gompi-2025a.eb

Build succeeded for 3 out of 3 (total: 7 mins 18 secs) (3 easyconfigs in total)
node4401.skiddo.os - Linux RHEL 9.6, x86_64, AMD EPYC 9755 128-Core Processor (zen5), Python 3.9.21
See https://gist.github.com/boegel/ac770b21d202e4c0da59b2e28bb91764 for a full test report.

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boegel approved these changes Apr 8, 2026
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lgtm

@boegel boegel merged commit 9a640a3 into easybuilders:develop Apr 8, 2026
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