Getting the IPOPT code as a tarball

To use the tarball, follow the steps below:

1. Download the desired tarball from http://www.coin-or.org/download/source/Ipopt, it has the form Ipopt-x.y.z.tgz, where x.y.z is the version number, such as 3.5.1. There might also be daily snapshot from the stable branch. The number of the latest official release can be found on the IPOPT Trac page.
2. Issue the following commands to unpack the archive file:
   $ gunzip Ipopt-x.y.z.tgz
   $ tar xvf Ipopt-x.y.z.tar
   Note: The $ indicates the command line prompt, do not type $, only the text following it.
3. Rename the directory you just extracted:
   $ mv Ipopt-x.y.z CoinIpopt
4. Change into the root directory of the IPOPT distribution
   $ cd CoinIpopt

In the following, ``$IPOPTDIR'' will refer to the directory in which you are right now (output of pwd).