Source: gcc-15 Version: 15.2.0-10 highway fails to build on arm64. After discussing the issue with upstream, it seems to be solely found in Debian/gcc-15/arm64. Ref: * https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123011 Quote: [...] Andrew Pinski 2025-12-04 20:45:34 UTC Looks to work on the trunk testing GCC 15.2.0 release. [...]