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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"`main` fails to compile with gcc 15","articleBody":"Attempting to build the `main` branch with gcc 15 (tested on Fedora 42 and Ubuntu 25.10 (container)) fails to compile with\n```console\ncc1plus: error: attribute 'target' argument 'avx10.2-512' is unknown\n```\n\nThis appears to have started after the V8 14.2 update -- possibly highway (which is version sniffing the compiler)? https://github.com/nodejs/node/blob/72c0fdf125314145e6ddef3543965ee63227542f/deps/v8/third_party/highway/src/hwy/detect_targets.h#L197-L206\n\nSwitching to `clang` (on Fedora, clang 20.1.8) or gcc 14 (Ubuntu) succeeds without the error (both of which would cause `HWY_BROKEN_AVX10_2` to be defined according to the above snippet).\n\n```console\n$ gcc --version\ngcc (GCC) 15.2.1 20250808 (Red Hat 15.2.1-1)\nCopyright (C) 2025 Free Software Foundation, Inc.\nThis is free software; see the source for copying conditions.  There is NO\nwarranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n$\n```\n\n```console\n$ gcc --version\ngcc (Ubuntu 15.2.0-4ubuntu4) 15.2.0\nCopyright (C) 2025 Free Software Foundation, Inc.\nThis is free software; see the source for copying conditions.  There is NO\nwarranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n$\n```","author":{"url":"https://github.com/richardlau","@type":"Person","name":"richardlau"},"datePublished":"2025-11-03T12:15:38.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":3},"url":"https://github.com/60566/node/issues/60566"}