deps/v8/highway fails to build on ppc64el

Version

24.11.1

Platform

6.17.10+deb14-amd64
debian 14/sid

Subsystem

v8

What steps will reproduce the bug?

Build on ppc64el

How often does it reproduce? Is there a required condition?

Always

What is the expected behavior? Why is that the expected behavior?

To build on that architecture. Nodejs has a long history of being perfectly buildable on ppc64el on debian.

What do you see instead?

In file included from ../deps/v8/third_party/highway/src/hwy/highway.h:586,
                 from ../deps/v8/third_party/highway/src/hwy/per_target.cc:28,
                 from ../deps/v8/third_party/highway/src/hwy/foreach_target.h:266,
                 from ../deps/v8/third_party/highway/src/hwy/per_target.cc:27:
../deps/v8/third_party/highway/src/hwy/ops/ppc_vsx-inl.h: In function ‘hwy::N_PPC9::VFromD<D> hwy::N_PPC9::PromoteTo(D, VFromD<typename D::Rebind<float> >)’:
../deps/v8/third_party/highway/src/hwy/ops/ppc_vsx-inl.h:3713:33: error: there are no arguments to ‘__builtin_vsx_xvcvspsxds’ that depend on a template parameter, so a declaration of ‘__builtin_vsx_xvcvspsxds’ must be available [-Wtemplate-body]
 3713 |   return VFromD<decltype(di64)>{__builtin_vsx_xvcvspsxds(raw_v)};

Additional information

Full build available here: https://debusine.debian.net/debian/developers/artifact/2863118/

FWIW v24.x builds are okay on our CI with gcc 12: https://ci.nodejs.org/job/node-test-commit-plinux/61713/
Could easily be a gcc 15 incompatibility -- I already had to backport an upstream highway fix for main on x64 for gcc 15.

@kapouer

@kapouer I think this is google/highway#2443, fixed by google/highway#2445.
Is that something you can verify? If it fixes then I'm open to floating another patch on highway for Node.js.

@richardlau

@richardlau verifying...

It builds.

Opened #61008.

deps: V8: cherry-pick highway@dcc0ca1cd42

@santigimeno

@santigimeno what?

Fix is included in Node.js 25.5.0 and 24.14.0.

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deps/v8/highway fails to build on ppc64el #60992

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Subsystem

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How often does it reproduce? Is there a required condition?

What is the expected behavior? Why is that the expected behavior?

What do you see instead?

Additional information

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deps/v8/highway fails to build on ppc64el #60992

Description

Version

Platform

Subsystem

What steps will reproduce the bug?

How often does it reproduce? Is there a required condition?

What is the expected behavior? Why is that the expected behavior?

What do you see instead?

Additional information

Activity

richardlau commented on Dec 8, 2025

richardlau commented on Dec 8, 2025

kapouer commented on Dec 8, 2025

kapouer commented on Dec 9, 2025

richardlau commented on Dec 9, 2025

juanarbol commented on Mar 18, 2026

richardlau commented on Mar 23, 2026

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