$ cc -Wall -O2 -o ~/poc5004/pll_harness ~/poc5004/pll_harness.c
(no diagnostics)
BUILD_OK

$ cc -g -O0 -o pll_harness_g pll_harness.c
(no diagnostics; used for the gdb line-level attribution in gdb_lines.txt)
BUILD_OK

(guest: DragonFly dfbsd 6.5-DEVELOPMENT #0: Thu Jul  2 06:02:54 UTC 2026 x86_64, base cc/gcc)