From: Theo Buehler <tb@theobuehler.org>
Subject: Re: Numpy segfaults on amd64
To: Stuart Cassoff <exokoide@yahoo.ca>
Cc: Stuart Henderson <stu@spacehopper.org>, Daniel Dickman <didickman@gmail.com>, OpenBSD Ports <ports@openbsd.org>
Date: Fri, 16 Jan 2026 23:23:02 +0100

> CPU Optimization Options
>   baseline:
>     Requested : min
>     Enabled   : X86_V2
>   dispatch:
>     Requested : max
>     Enabled   : X86_V3 X86_V4 AVX512_ICL AVX512_SPR

With the below diff I get this:

CPU Optimization Options
  baseline:
    Requested : none
    Enabled   :
  dispatch:
    Requested : max
    Enabled   : X86_V2 X86_V3 X86_V4 AVX512_ICL AVX512_SPR

If it works, I think it is what we want. This is now unmaintained and
may break at some point, but for now I guess it's the best we can do:
keep the old boxes working, newer hardware gets to use the fancy code.

https://github.com/numpy/numpy/blob/729d61c84d087dccf17e4ef960391227aaa0c5b3/doc/source/reference/simd/build-options.rst#targeting-older-cpus

Index: Makefile
===================================================================
RCS file: /cvs/ports/math/py-numpy/Makefile,v
diff -u -p -r1.96 Makefile
--- Makefile	12 Jan 2026 05:39:02 -0000	1.96
+++ Makefile	16 Jan 2026 22:16:39 -0000
@@ -4,6 +4,8 @@ MODPY_DISTV=	2.4.1
 DISTNAME=	numpy-${MODPY_DISTV}
 PKGNAME=	py-${DISTNAME}
 
+REVISION=	0
+
 CATEGORIES=	math devel
 
 HOMEPAGE=	https://numpy.org/
@@ -78,6 +80,9 @@ pre-build:
 # https://github.com/numpy/numpy/issues/20799
 .if ${MACHINE_ARCH} == i386
 	sed -i '/^option.*disable-optim/ s/false/true/' ${WRKSRC}/meson.options
+.endif
+.if ${MACHINE_ARCH} == amd64
+MODPY_PYBUILD_ARGS += -Csetup-args=-Dcpu-baseline="none"
 .endif
 
 do-test: