1 2.-include <local.sysdir.mk> 3 4# Search for kernel source tree in standard places. 5.if !defined(SYSDIR) 6.for _dir in ${SRCTOP:D${SRCTOP}/sys} \ 7 ${.CURDIR}/../.. ${.CURDIR}/../../.. ${.CURDIR}/../../../.. \ 8 ${.CURDIR}/../../../../.. /sys /usr/src/sys 9.if !defined(SYSDIR) && exists(${_dir}/kern/) && exists(${_dir}/conf/kmod.mk) 10SYSDIR= ${_dir:tA} 11.endif 12.endfor 13.endif 14.if !defined(SYSDIR) || !exists(${SYSDIR}/kern/) || \ 15 !exists(${SYSDIR}/conf/kmod.mk) 16.error Unable to locate the kernel source tree. Set SYSDIR to override. 17.endif 18