René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Build failure: undefined reference to VisitUint64Add3WithCarry on Loong64","articleBody":"### Version\n\nv27.0.0-pre\n\n### Platform\n\n```text\nLinux test-loongson-fedora43-loong64-1 7.1.0-0.rc7.260610gacb7500801e9.49.fc43.loongarch64 #1 SMP PREEMPT_DYNAMIC Fri Jun 12 18:09:12 CST 2026 loongarch64 GNU/Linux\n```\n\n### Subsystem\n\nv8\n\n### What steps will reproduce the bug?\n\nBuild Node.js from source on a Loong64 machine:\n./configure --openssl-no-asm\nmake -j16\n\n### How often does it reproduce? Is there a required condition?\n\nIt reproduces 100% of the time when compiling the current main branch on the Loong64 architecture.\n\n### What is the expected behavior? Why is that the expected behavior?\n\nThe compilation and linking process should complete successfully without undefined reference errors.\n\n### What do you see instead?\n\nWe recently ran into a linking error on Loong64 during the Node.js build process: undefined reference to VisitUint64Add3WithCarry in the V8 Turboshaft compiler backend.\nHere is the CI failure log for reference:\nhttps://ci.nodejs.org/job/node-test-commit-loongarch64/nodes=clfs23-64/1168/console\n\nI’ve identified two possible paths forward to resolve the issue:\n\n1. Cherry-pick upstream V8 patches:\nApplying the following two V8 Gerrit CLs to our current V8 tree fixes the linker issue. I have verified this locally, and the build succeeds after applying them:\nhttps://chromium-review.googlesource.com/c/v8/v8/+/8393957\nhttps://chromium-review.googlesource.com/c/v8/v8/+/8416173\n\n2. Upgrade V8 to 15.6.4:\nV8 15.6.4 already includes these changes and compiles successfully on our end.\n\nI was wondering if there are any current plans to upgrade V8 to 15.6.4 in the near future? If a version bump is already planned, that would naturally resolve this problem.\n\nI would love to get your advice on which approach the project prefers—whether I should submit a PR to cherry-pick these two patches, or wait for a V8 minor version bump.\n\nThanks so much for your time and guidance!\n\n### Additional information\n\n_No response_","author":{"url":"https://github.com/Javonne-liu","@type":"Person","name":"Javonne-liu"},"datePublished":"2026-10-10T01:16:15Z","url":"https://github.com/nodejs/node/issues/66633"}