title: Issues with installing caret package of R in archlinux
body: <p>I am trying to install the package <code>caret</code> in R for sometime now, and I am getting this error message:</p>
  
  <pre><code>*installing *source* package ‘minqa’ ...
  ** package ‘minqa’ successfully unpacked and MD5 sums checked
  ** libs
  gfortran   -fpic  -g -O2  -c altmov.f -o altmov.o
  make: gfortran: Command not found
  make: *** [altmov.o] Error 127
  /usr/lib64/R/etc/Makeconf:155: recipe for target 'altmov.o' failed
  ERROR: compilation failed for package ‘minqa’
  * removing ‘/home/mohammad/R/x86_64-pc-linux-gnu-library/3.3/minqa’
  Warning in install.packages :
    installation of package ‘minqa’ had non-zero exit status
  * installing *source* package ‘SparseM’ ...
  ** package ‘SparseM’ successfully unpacked and MD5 sums checked
  ** libs
  gfortran   -fpic  -g -O2  -c bckslv.f -o bckslv.o
  make: gfortran: Command not found
  /usr/lib64/R/etc/Makeconf:155: recipe for target 'bckslv.o' failed
  make: *** [bckslv.o] Error 127
  ERROR: compilation failed for package ‘SparseM’
  * removing ‘/home/mohammad/R/x86_64-pc-linux-gnu-library/3.3/SparseM’
  Warning in install.packages :
    installation of package ‘SparseM’ had non-zero exit status
  ERROR: dependency ‘minqa’ is not available for package ‘lme4’
  * removing ‘/home/mohammad/R/x86_64-pc-linux-gnu-library/3.3/lme4’
  Warning in install.packages :
    installation of package ‘lme4’ had non-zero exit status
  ERROR: dependency ‘SparseM’ is not available for package ‘quantreg’
  * removing ‘/home/mohammad/R/x86_64-pc-linux-gnu-library/3.3/quantreg’
  Warning in install.packages :
    installation of package ‘quantreg’ had non-zero exit status
  ERROR: dependency ‘lme4’ is not available for package ‘pbkrtest’
  * removing ‘/home/mohammad/R/x86_64-pc-linux-gnu-library/3.3/pbkrtest’
  Warning in install.packages :
    installation of package ‘pbkrtest’ had non-zero exit status
  ERROR: dependencies ‘pbkrtest’, ‘quantreg’ are not available for package ‘car’
  * removing ‘/home/mohammad/R/x86_64-pc-linux-gnu-library/3.3/car’
  Warning in install.packages :
    installation of package ‘car’ had non-zero exit status
  ERROR: dependency ‘car’ is not available for package ‘caret’
  * removing ‘/home/mohammad/R/x86_64-pc-linux-gnu-library/3.3/caret’
  Warning in install.packages :
    installation of package ‘caret’ had non-zero exit status
  
  The downloaded source packages are in
      ‘/tmp/RtmpVBZAgE/downloaded_packages’
  </code></pre>
  
  <p>Now according to some of the post, I tried to install <code>minqa</code>,<code>SparseM</code>, <code>lme4</code>,<code>car</code> ... separately. Its not installing properly. The main problem that I suspect is the absence of <code>gfortran</code> library in my archlinux. I tried to find the package <code>gfortran</code> in arch repository using pacman. It is not present there, so in the end I am just stuck. Does anybody has a solution or faced this problem before. Thanks. </p>