build.log — DF-5793 (guest, cc 8.3)

$ cc -O2 -o /home/maxx/dup_directed /tmp/dup_directed.c -lpthread && \
  cc -O2 -o /home/maxx/dup_reserved  /tmp/dup_reserved.c  -lpthread
BUILD-OK
(clean builds; earlier iterations of the rigs had userland accounting bugs
documented in VERDICT.md — dup2 return value, source-fd placement)