Many Linux distributions will come with all necessary tools. All you should need to do is check the compiler versions. On a Debian-based distribution, you can obtain all necessary tools with the following command:
sudo apt-get install gcc g++ gfortran subversion patch wgetReplace apt-get with your relevant package manager, e.g. yum for Red Hat-based distributions, zypper for SUSE, etc. The g++ and gfortran compilers may need to be specified respectively as gcc-c++ and gcc-gfortran with some package managers.
On Mac OS X, you need either the Xcode Command Line Tools, available at https://developer.apple.com/downloads after registering as an Apple Developer, or a community alternative such as https://github.com/kennethreitz/osx-gcc-installer/downloads to install the gcc and g++ compilers. It has been reported, that gcc/g++ 4.2 and older is not sufficient for using the HSL codes. If you have a recent version of Xcode installed, the Command Line Tools are available under Preferences, Downloads. In Xcode 3.x, the Command Line Tools are contained in the optional item ``UNIX Dev Support'' during Xcode installation. These items unfortunately do not come with a Fortran compiler, but you can get gfortran from http://gcc.gnu.org/wiki/GFortranBinaries#MacOS. We have been able to compile IPOPT using default Xcode versions of gcc and g++ and a newer version of gfortran from this link, but consistent version numbers may be an issue in future cases.