Client bug on made

Version : xymon-4.2.3

When I install Xymon client from sources, the make step crash on following messages:

../lib/hobbitclient.a(timefunc-client.o): In function `getntimer':

/usr/src/xymon-4.2.3/lib/timefunc.c:67: undefined reference to `clock_gettime'

../lib/hobbitclient.a(timefunc-client.o): In function `gettimer':

/usr/src/xymon-4.2.3/lib/timefunc.c:55: undefined reference to `clock_gettime'

collect2: ld returned 1 exit status

make[1]: *** [../client/bb] Error 1

make[1]: Leaving directory `/usr/src/xymon-4.2.3/common'

make: *** [common-client] Error 2

Bests regards,