1# $FreeBSD$ 2 3# Search for kernel source tree in standard places. 4.if !defined(SYSDIR) 5.for _dir in ${SRCTOP:D${SRCTOP}/sys} \ 6 ${.CURDIR}/../.. ${.CURDIR}/../../.. ${.CURDIR}/../../../.. \ 7 ${.CURDIR}/../../../../.. /sys /usr/src/sys 8.if !defined(SYSDIR) && exists(${_dir}/kern/) && exists(${_dir}/conf/kmod.mk) 9SYSDIR= ${_dir:tA} 10.endif 11.endfor 12.endif 13.if !defined(SYSDIR) || !exists(${SYSDIR}/kern/) || \ 14 !exists(${SYSDIR}/conf/kmod.mk) 15.error Unable to locate the kernel source tree. Set SYSDIR to override. 16.endif 17