on my 2.99.12 the 2.99.14 kernel does not compile:

cc -ffreestanding -march=pentium4 -O2 -Werror -Wall -Wno-main -Wno-format-zero-length -Wpointer-arith -Wmissing-prototypes -Wstrict-prototypes -Wno-sign-compare -fno-zero-initialized-in-bss -Di386 -I. -I../../../../arch -I../../../.. -nostdinc -DACPICA_PEDANTIC -DMAXUSERS=8 -D_KERNEL -D_KERNEL_OPT -I../../../../dist/ipf -c ../../../../dist/ipf/netinet/ip_nat.c
../../../../dist/ipf/netinet/ip_nat.c: In function `fr_nat_ioctl':
../../../../dist/ipf/netinet/ip_nat.c:656: error: structure has no member named `in_v'
../../../../dist/ipf/netinet/ip_nat.c:657: error: structure has no member named `in_v'
../../../../dist/ipf/netinet/ip_nat.c: In function `fr_checknatout':
../../../../dist/ipf/netinet/ip_nat.c:3572: error: structure has no member named `in_v'
../../../../dist/ipf/netinet/ip_nat.c: In function `fr_checknatin':
../../../../dist/ipf/netinet/ip_nat.c:3854: error: structure has no member named `in_v'
*** Error code 1