GNU bug report logs - #60082
openblas FTBFS in KVM with default CPU

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Tril <tril <at> metapipe.net>
To: bug-guix <at> gnu.org
Subject: openblas FTBFS in KVM with default CPU
Date: Wed, 14 Dec 2022 09:24:35 -0800

FTBFS = "Fails To Build From Source"

guix package --no-substitutes -i openblas

resulted in the error below on Guix System running on a KVM in Proxmox
VE using the default CPU called "kvm64".

---
OPENBLAS_NUM_THREADS=1 OMP_NUM_THREADS=1 ./sblat3 < ./sblat3.dat

Program received signal SIGILL: Illegal instruction.

Backtrace for this error:
#0  0x7ffff7d2fc1a
#1  0x7ffff7d2ee45
#2  0x7ffff7a2209f
#3  0x186ac04
bash: line 1: 25848 Illegal instruction     OPENBLAS_NUM_THREADS=1 OMP_NUM_THREADS=1 ./sblat3 < ./sblat3.dat

make[1]: *** [Makefile:167: level3] Error 132
---

I shutdown the VM and changed the CPU type to "host" (which provides the full
instruction set of my CPU to the VM) and was able to build successfully
using the same command.

openblas                0.3.20          out     /gnu/store/xghpgl3fnr603z16vg7hldmpxygriqm2-openblas-0.3.20

Message #12 received at 60082-done <at> debbugs.gnu.org (full text, mbox):

From: Maxim Cournoyer <maxim.cournoyer <at> gmail.com>
To: Tril <tril <at> metapipe.net>
Cc: 60082-done <at> debbugs.gnu.org
Subject: Re: bug#60082: openblas FTBFS in KVM with default CPU
Date: Sat, 09 Mar 2024 20:02:33 -0500

Hi,

<tril <at> metapipe.net> writes:

> FTBFS = "Fails To Build From Source"
>
> guix package --no-substitutes -i openblas
>
> resulted in the error below on Guix System running on a KVM in Proxmox
> VE using the default CPU called "kvm64".
>
> ---
> OPENBLAS_NUM_THREADS=1 OMP_NUM_THREADS=1 ./sblat3 < ./sblat3.dat
>
> Program received signal SIGILL: Illegal instruction.
>
> Backtrace for this error:
> #0  0x7ffff7d2fc1a
> #1  0x7ffff7d2ee45
> #2  0x7ffff7a2209f
> #3  0x186ac04
> bash: line 1: 25848 Illegal instruction OPENBLAS_NUM_THREADS=1
> OMP_NUM_THREADS=1 ./sblat3 < ./sblat3.dat
>
> make[1]: *** [Makefile:167: level3] Error 132
> ---
>
> I shutdown the VM and changed the CPU type to "host" (which provides the full
> instruction set of my CPU to the VM) and was able to build successfully
> using the same command.
>
> openblas 0.3.20 out
> /gnu/store/xghpgl3fnr603z16vg7hldmpxygriqm2-openblas-0.3.20

Thanks for the report.  That's probably due to some limitation in QEMU.
It'd be best to report it there -- it's outside of the scope of Guix,
although you could offer a Guix-based reproducer in your upstream
report.

Closing.

-- 
Thanks,
Maxim

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