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👷 Run the Mac LLVM job on macOS 26 - #127
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On macOS 14/15, LLVM 22+ programs link against llvm-toolchain's bundled libc++, which conflicts with the system libc++ that the ASan runtime uses. macOS 26 uses only the system libc++, so ASan keeps working in CI. Rename the job to mac_os_x_llvm so future runner bumps don't change the check name.
This was referenced Oct 15, 2026
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On macOS 14/15, llvm-toolchain links LLVM 22/23 programs against its bundled libc++, but the ASan runtime links against the system libc++. Two libc++ copies in one test process make ASan abort at exit. This broke libhal/v5's
macos-15job (see libhal/libhal-cmake-util#60 for the local-machine side).On macOS 26 the toolchain uses only the system libc++, so ASan works. This moves the Mac LLVM job to
macos-26and renames it frommac_os_x_15_llvmtomac_os_x_llvm, so future runner bumps don't change the check name.Heads-up for required checks: the new check name is
<caller> / mac_os_x_llvm / 🐉 LLVM 🍎 Mac ARM64. libhal'smainruleset still requiresmac_os_x_latest_llvm(stale since #124) and🐉 LLVM Arm Cortex M(split into M0-M7 / M23-M85 in #126).