where can we find SIGF_SC and SIGF_HANDLER declaration?

itojun

itojun[starfruit:~/NetBSD/src/sys/arch/i386/compile/STARFRUIT] make
making sure the compat library is up to date...
`libcompat.a' is up to date.
making sure the kern library is up to date...
`libkern.o' is up to date.
sh ../../../../conf/newvers.sh
cc  -ffreestanding -g -O2 -Werror -Wall -Wno-main -Wno-format-zero-length -Wpointer-arith -Wmissing-prototypes -Wstrict-prototypes -Wno-uninitialized  -Di386 -I.  -I../../../../arch -I../../../.. -nostdinc -DLKM -DDIAGNOSTIC -DMAXUSERS=32 -D_KERNEL -D_KERNEL_OPT  -c vers.c
ld -T ../../../../arch/i386/conf/kern.ldscript -Ttext c0100000 -e start -X -o netbsd ${SYSTEM_OBJ} vers.o
ibcs2_sigcode.o: In function `ibcs2_sigcode':
ibcs2_sigcode.o(.text+0x3): undefined reference to `SIGF_HANDLER'
ibcs2_sigcode.o(.text+0xa): undefined reference to `SIGF_SC'
*** Error code 1

Stop.