kernel/Makefile gave capsules/v4/sys/map-64.f18 and map-32.f18 one rule with
two plain targets -- in GNU make, two rules sharing a recipe. Under -j both
ran at once: two make -C v4 sysmap built and ran the same v4/build/mkmap-<w>
side by side (Build run 255's RASPI job: "mkmap-32: Permission denied").
Now one grouped target (&:, GNU make 4.3+, as here and in the CI image).
Seen to fail first: the two targets with -j8, mkmap removed each time, 12
runs -- 6 failed ("Text file busy", "Permission denied"). After: 0 of 12.
Both sets of runs in logs/20261112-152711/race-185/. The map files are unchanged.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_017RzZgrf7V7Zk2iczBXDRbm