GNU bug report logs - #77404
[PATCH 0/1] PETSc compiler optimization: Pass from -O1 to -O3

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Luca Cirrottola <luca.cirrottola <at> inria.fr>
Subject: bug#77404: closed (Close)
Date: Mon, 31 Mar 2025 14:08:05 +0000

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Your bug report

#77404: [PATCH 0/1] PETSc compiler optimization: Pass from -O1 to -O3

which was filed against the guix-patches package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to 77404 <at> debbugs.gnu.org.

-- 
77404: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=77404
GNU Bug Tracking System
Contact help-debbugs <at> gnu.org with problems

[Message part 2 (message/rfc822, inline)]

From: Andreas Enge <andreas <at> enge.fr>
To: 77404-done <at> debbugs.gnu.org
Cc: Luca Cirrottola <luca.cirrottola <at> inria.fr>
Subject: Close
Date: Mon, 31 Mar 2025 16:06:42 +0200

Hello,

thanks for the patch! I have pushed it after adapting the commit message
to our coding standards.

Andreas

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From: Luca Cirrottola <luca.cirrottola <at> inria.fr>
To: guix-patches <at> gnu.org
Cc: Luca Cirrottola <luca.cirrottola <at> inria.fr>
Subject: [PATCH 0/1] PETSc compiler optimization: Pass from -O1 to -O3
Date: Mon, 31 Mar 2025 12:42:17 +0200

Hello Guix,

I have recently noticed that the "petsc" package raises the following warnings during the configuration phase, showing that the compiler only does O1 optimization for now:

=============================================================================================
                         Configuring PETSc to compile on your system
=============================================================================================
=============================================================================================
                                     ***** WARNING *****
  Using default C optimization flags "-g -O". You might consider manually setting optimal
  optimization flags for your system with COPTFLAGS="optimization flags" see
  config/examples/arch-*-opt.py for examples
=============================================================================================
=============================================================================================
                                     ***** WARNING *****
  Using default Cxx optimization flags "-g". You might consider manually setting optimal
  optimization flags for your system with CXXOPTFLAGS="optimization flags" see
  config/examples/arch-*-opt.py for examples
=============================================================================================
=============================================================================================
                                     ***** WARNING *****
  Using default FC optimization flags "-g -O". You might consider manually setting optimal
  optimization flags for your system with FOPTFLAGS="optimization flags" see
  config/examples/arch-*-opt.py for examples
=============================================================================================

So here is a patch that follows the hints and passes the "-g -O3" flags to the COPTFLAGS, CXXOPTFLAGS and FOPTFLAGS variables.
The package builds successfully on my machine. Some tests fail for both the packages "petsc" and "petsc-openmpi", but these were failing already with the "-O1" flag (so maybe this could be the topic of another issue).
I am looking forward for your review.

Cheers,
Luca

Luca Cirrottola (1):
  Activate higher compiler optimization for PETSc.

 gnu/packages/maths.scm | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)


base-commit: 4b97ae180fc13f7e4818cf48519f8a77c22c7797
-- 
2.34.1

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