title: librrd link problem
body: <p>i use rrd (graphic programming ) under rrdtool, i have installed; and i rund gcc<br>
  gcc -I/usr/include -I/usr/local/include -L/usr/lib -L/usr/local/lib -lrrd -o myprog test.c</p>
  
  <p>myprog is execute file
  and test.c ist testprogram who i use  function rrd_create from libary but gcc put out error like this:
  /usr/bin/ld: cannot find -lrrd
  why!!!!</p>