CORE_INCS="$UNIX_INCS"
CORE_DEPS="$UNIX_DEPS $FREEBSD_DEPS"
CORE_SRCS="$UNIX_SRCS $FREEBSD_SRCS"

PIPE="-pipe"


# __FreeBSD_version is the best way to determine whether
# some capability exists and is safe to use

version=`grep "#define __FreeBSD_version" /usr/include/osreldate.h \
         | sed -e 's/^.* \(.*\)$/\1/'`


# setproctitle() in libutil

if [ \( $version -ge 500000 -a $version -lt 500012 \) \
     -o $version -lt 410002 ]
then
    echo " + setproctitle() in libutil"

    CORE_LIBS="$CORE_LIBS -lutil"
fi

# sendfile

if [ $version -gt 300007 ]; then
    echo " + using sendfile()"

    have=HAVE_SENDFILE . auto/have
    CORE_SRCS="$CORE_SRCS $FREEBSD_SENDFILE_SRCS"
fi


# kqueue

if [ \( $version -lt 500000 -a $version -ge 410000 \) \
     -o $version -ge 500011 ]
then
    echo " + using kqueue"

    have=HAVE_KQUEUE . auto/have
    have=HAVE_CLEAR_EVENT . auto/have
    EVENT_MODULES="$EVENT_MODULES $KQUEUE_MODULE"
    CORE_SRCS="$CORE_SRCS $KQUEUE_SRCS"
    EVENT_FOUND=YES
fi


# kqueue's NOTE_LAWAT

if [ \( $version -lt 500000 -a $version -ge 430000 \) \
     -o $version -ge 500018 ]
then
    echo " + using kqueue's NOTE_LOWAT"
    have=HAVE_LOWAT_EVENT . auto/have
fi


if [ $USE_THREADS = "rfork" ]; then

    echo " + using rfork()"

    # kqueue's EVFILT_SIGNAL is safe

    if [ $version -gt 460101 ]; then
        echo " + kqueue's EVFILT_SIGNAL is safe"
        have=HAVE_SAFE_EVFILT_SIGNAL . auto/have
    else
        echo "$0: error: the kqueue's EVFILT_SIGNAL is unsafe on this"
        echo "FreeBSD version, so --with-threads=rfork could not be used"
        echo

        exit 1
    fi
fi


if [ $EVENT_AIO = YES ]; then
    have=HAVE_AIO . auto/have
    EVENT_MODULES="$EVENT_MODULES $AIO_MODULE"
    CORE_SRCS="$CORE_SRCS $AIO_SRCS"
else
    have=HAVE_AIO . auto/nohave
fi