deps/v8/highway fails to build on ppc64el

[kapouer]

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/

[richardlau]

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.

[richardlau]

@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.

[kapouer]

@richardlau verifying...

[kapouer]

It builds.

[richardlau]

Opened #61008.

[juanarbol]

@santigimeno what?

[richardlau]

Fix is included in Node.js 25.5.0 and 24.14.0.