gudev error

checking for xsltproc... /usr/bin/xsltproc
checking for library containing clock_gettime... none required
checking for BLKID... yes
checking for KMOD... yes
checking for /usr/share/pci.ids... yes
checking for /usr/share/hwdata/pci.ids... no
checking for /usr/share/misc/pci.ids... no
checking for USBUTILS... yes
checking for USB database location... /usr/share/usb.ids
checking for PCI database location... /usr/share/pci.ids
Package systemd was not found in the pkg-config search path.
Perhaps you should add the directory containing `systemd.pc'
to the PKG_CONFIG_PATH environment variable
No package 'systemd' found
checking for GLIB... yes
checking for INTROSPECTION... yes
checking for gperf... /usr/bin/gperf
checking linux/input.h usability... yes
checking linux/input.h presence... yes
checking for linux/input.h... yes
configure: creating ./config.status
config.status: creating Makefile
config.status: creating src/docs/Makefile
config.status: creating src/docs/version.xml
config.status: creating src/gudev/docs/Makefile
config.status: creating src/gudev/docs/version.xml
config.status: creating config.h
config.status: executing depfiles commands
config.status: executing libtool commands

        udev 182
        ========

        prefix:                  /usr
        rootprefix:              /usr
        sysconfdir:              /etc
        bindir:                  ${exec_prefix}/bin
        libdir:                  ${exec_prefix}/lib
        rootlibdir:              ${exec_prefix}/lib
        libexecdir:              ${exec_prefix}/libexec
        datarootdir:             ${prefix}/share
        mandir:                  /usr/man
        includedir:              ${prefix}/include
        include_prefix:          /usr/include
        systemdsystemunitdir:
        firmware path:           \"/usr/lib/firmware/updates/\", \"/usr/lib/firmware/\"
        usb.ids:                 /usr/share/usb.ids
        pci.ids:                 /usr/share/pci.ids

        compiler:                gcc
        cflags:                  -O2 -march=atom -pipe
        ldflags:
        xsltproc:                /usr/bin/xsltproc
        gperf:                   /usr/bin/gperf

        logging:                 yes
        debug:                   no
        selinux:                 no

        man pages                yes
        gudev:                   yes
        gintrospection:          yes
        keymap:                  yes
        mtd_probe:               yes
        rule_generator:          no
        floppy:                  no

+ make
  GEN    src/gudev/gudevmarshal.h
  GEN    src/gudev/gudevmarshal.c
  GEN    src/gudev/gudevenumtypes.c
  GEN    src/keymap/keys.txt
  GEN    src/keymap/keys-from-name.gperf
  GEN    src/keymap/keys-from-name.h
  GEN    src/keymap/keys-to-name.h
make --no-print-directory all-recursive
Making all in .
  CC     src/libudev.lo
  CC     src/libudev-list.lo
  CC     src/libudev-util.lo
  CC     src/libudev-device.lo
  CC     src/libudev-enumerate.lo
  CC     src/libudev-monitor.lo
  CC     src/libudev-queue.lo
  CCLD   libudev.la
  CC     src/gudev/libgudev_1_0_la-gudevclient.lo
  CC     src/gudev/libgudev_1_0_la-gudevdevice.lo
  CC     src/gudev/libgudev_1_0_la-gudevenumerator.lo
  CC     src/gudev/libgudev_1_0_la-gudevmarshal.lo
  CC     src/gudev/libgudev_1_0_la-gudevenumtypes.lo
  CCLD   libgudev-1.0.la
  CC     src/libudev-util-private.lo
  CC     src/libudev-device-private.lo
  CC     src/libudev-queue-private.lo
  CCLD   libudev-private.la
  CC     src/udevadm-udev-event.o
  CC     src/udevadm-udev-watch.o
  CC     src/udevadm-udev-node.o
  CC     src/udevadm-udev-rules.o
  CC     src/udevadm-udev-ctrl.o
  CC     src/udevadm-udev-builtin.o
  CC     src/udevadm-udev-builtin-blkid.o
  CC     src/udevadm-udev-builtin-firmware.o
  CC     src/udevadm-udev-builtin-hwdb.o
  CC     src/udevadm-udev-builtin-input_id.o
  CC     src/udevadm-udev-builtin-kmod.o
  CC     src/udevadm-udev-builtin-path_id.o
  CC     src/udevadm-udev-builtin-usb_id.o
  CC     src/udevadm-udevadm.o
  CC     src/udevadm-udevadm-info.o
  CC     src/udevadm-udevadm-control.o
  CC     src/udevadm-udevadm-monitor.o
  CC     src/udevadm-udevadm-settle.o
  CC     src/udevadm-udevadm-trigger.o
  CC     src/udevadm-udevadm-test.o
  CC     src/udevadm-udevadm-test-builtin.o
  CCLD   udevadm
  CC     src/udevd-udev-event.o
  CC     src/udevd-udev-watch.o
  CC     src/udevd-udev-node.o
  CC     src/udevd-udev-rules.o
  CC     src/udevd-udev-ctrl.o
  CC     src/udevd-udev-builtin.o
  CC     src/udevd-udev-builtin-blkid.o
  CC     src/udevd-udev-builtin-firmware.o
  CC     src/udevd-udev-builtin-hwdb.o
  CC     src/udevd-udev-builtin-input_id.o
  CC     src/udevd-udev-builtin-kmod.o
  CC     src/udevd-udev-builtin-path_id.o
  CC     src/udevd-udev-builtin-usb_id.o
  CC     src/udevd-udevd.o
  CC     src/udevd-sd-daemon.o
  CCLD   udevd
src/udevd-sd-daemon.o: In function `sd_is_mq':
sd-daemon.c:(.text+0x82c): undefined reference to `mq_getattr'
collect2: error: ld returned 1 exit status
Makefile:1501: recipe for target 'udevd' failed
make[2]: *** [udevd] Error 1
Makefile:2901: recipe for target 'all-recursive' failed
make[1]: *** [all-recursive] Error 1
Makefile:1058: recipe for target 'all' failed
make: *** [all] Error 2
=======> ERROR: Building '/usr/ports/contrib/gudev/gudev#182-1.pkg.tar.gz' failed.