title: /usr/bin/ld: cannot find -lgmp
body: <pre><code>[root@ bncsutil]# make
  g++  -Wall -O3 -I ../ -Wno-multichar -fPIC -shared -lgmp bsha1.o cdkeydecoder.o checkrevision.o decodekey.o file.o libinfo.o oldauth.o nls.o pe.o sha1.o stack.o -o libbncsutil.so
  /usr/bin/ld: cannot find -lgmp
  collect2: ld returned 1 exit status
  make: *** [libbncsutil.so] Error 1
  </code></pre>
  
  <p>I try to do this in centos-6-x86-devel.
  Gmp is already installed. Seems like something wrong with path, but i don't know what exactly do.</p>