title: slam package install fails with make error
body: <p>I'm trying to install the slam package, but it seems to fail on my system. I'm running ubuntu 12.04. I thought it was a missing library or something so I installed a few that match liblas, but no dice. </p>
  
  <pre><code>* installing *source* package ‘slam’ ...
  ** package ‘slam’ successfully unpacked and MD5 sums checked
  ** libs
  gcc -std=gnu99 -I/usr/share/R/include -DNDEBUG      -fpic  -O3 -pipe  -g  -c grouped.c -o grouped.o
  gcc -std=gnu99 -I/usr/share/R/include -DNDEBUG      -fpic  -O3 -pipe  -g  -c sparse.c -o sparse.o
  gcc -std=gnu99 -I/usr/share/R/include -DNDEBUG      -fpic  -O3 -pipe  -g  -c util.c -o util.o
  gcc -std=gnu99 -shared -o slam.so grouped.o sparse.o util.o -lblas -lgfortran -lm -lquadmath -L/usr/lib/R/lib -lR
  /usr/bin/ld: cannot find -lblas
  collect2: ld returned 1 exit status
  make: *** [slam.so] Error 1
  ERROR: compilation failed for package ‘slam’
  * removing ‘/home/brandon/.R/i686-pc-linux-gnu-library/2.15/slam’
  </code></pre>
  
  <p>I've tried: </p>
  
  <pre><code>sudo apt-get install liblas1 liblas-bin liblas-dev
  </code></pre>