=== genassym.o + assym.s regen (pristine, kern.post.mk rules, VKERNEL64 build tree) ===
cc -c -O2 -pipe -Wall -Wredundant-decls -Wnested-externs -Wstrict-prototypes -Wmissing-prototypes -Wpointer-arith -Wcast-qual -Wold-style-definition -Wmissing-include-dirs -Wno-pointer-sign -Winit-self -Wundef -Wno-unused-but-set-variable -std=gnu11 -g -nostdinc -I. -Iinclude -I../.. -I../../../include -I/usr/src/sys/compile/VKERNEL64 -I../../dev/acpica -I../../contrib/dev/acpica/source/include -I../../dev/netif/ath/ath_hal -I../../contrib/dev/ath/ath_hal -I../../dev/drm/include -I../../dev/drm/include/drm -I../../dev/drm/include/uapi -I../../dev/drm/amd/include -D_KERNEL -DHAVE_KERNEL_OPTION_HEADERS -include opt_global.h -Wold-style-declaration -ffreestanding -D_KERNEL_VIRTUAL -fno-stack-protector -fno-strict-aliasing -fno-strict-overflow -fno-omit-frame-pointer -mno-mmx -mno-sse -msoft-float -mno-fp-ret-in-387 -mindirect-branch=thunk-inline -fcommon  -Werror ../../platform/vkernel64/x86_64/genassym.c
sh ../../kern/genassym.sh genassym.o > assym.s
cc -c -x assembler-with-cpp -DLOCORE -O2 -pipe -Wall -Wredundant-decls -Wnested-externs -Wstrict-prototypes -Wmissing-prototypes -Wpointer-arith -Wcast-qual -Wold-style-definition -Wmissing-include-dirs -Wno-pointer-sign -Winit-self -Wundef -Wno-unused-but-set-variable -std=gnu11 -g -nostdinc -I. -Iinclude -I../.. -I../../../include -I/usr/src/sys/compile/VKERNEL64 -I../../dev/acpica -I../../contrib/dev/acpica/source/include -I../../dev/netif/ath/ath_hal -I../../contrib/dev/ath/ath_hal -I../../dev/drm/include -I../../dev/drm/include/drm -I../../dev/drm/include/uapi -I../../dev/drm/amd/include -D_KERNEL -DHAVE_KERNEL_OPTION_HEADERS -include opt_global.h -Wold-style-declaration -fno-common -ffreestanding -D_KERNEL_VIRTUAL -fno-stack-protector -fno-strict-aliasing -fno-strict-overflow -fno-omit-frame-pointer -mno-mmx -mno-sse -msoft-float -mno-fp-ret-in-387 -mindirect-branch=thunk-inline ../../platform/vkernel64/x86_64/global.s -Werror

=== independent checker TU build (exact genassym CFLAGS, -Werror relaxed for harness) ===