RHEL5 client compilation error (xymon-4.2.3-RC1)

Hi folks!

I am trying to compile the xymon client on a RHEL 5.3 x86_64 server but I get the following errors (I have done a ./configure properly):

[...] ../lib/hobbitclient.a(timefunc-client.o): In function gettimer': /tmp/xymon-4.2.3-RC1/lib/timefunc.c:55: undefined reference to clock_gettime' ../lib/hobbitclient.a(timefunc-client.o): In function getntimer': /tmp/xymon-4.2.3-RC1/lib/timefunc.c:67: undefined reference to clock_gettime' collect2: ld devolvió el estado de salida 1 make[1]: *** [setup-newfiles] Error 1 make[1]: se sale del directorio `/tmp/xymon-4.2.3-RC1/build' make: *** [build-build] Error 2

Any clue on how to solve it? It seems to be a problem with includes (that function is in /usr/include/time.h)

Greetings, Juanra