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The basics of Objective-C are supported by the GNU compiler collection. In order to utilize the full power of Objective-C together with the Cocoa /openStep environments on Linux, and to work with many of the examples covered in this book, it is necessary to install gcc, the gcc Objective-C support package and the GNUstep environment.
The gcc Objective-C support can be installed on Linux simply by installing the ''gcc-objc'' package which is available with all Linux distributions. There are, however, two different paths to installing GNUstep. On those Linux distributions for which a pre-built GNUstep packages are provided this is simply a matter of issuing the appropriate command to install GNUstep. On Linux distributions for which pre-built packages are not available, the process involves downloading the GNUstep source code and then building and installing the packages manually.
This chapter will look at one distribution for which pre-built packages are available (Ubuntu Linux) and outline the corresponding installation process.
