This page is outdated. Take it with a grain of salt.
Have a look here for the latest version.
GBDK is also available by anonymous CVS from sourceforge - have a look at the project page.
Installing GBDK requires the following steps:
You must have gcc, gnu make and /bin/csh for building GBDK.
% gzip -cd SDK.tar.gz | tar xf -
% cd SDK-2.0
% make
% make install
This will create a directory ($HOME/SDK/XX-XX/Y.Y.Y by default, where XX-XX is the target and Y.Y.Y is the version number) with all the files you need in it.
% cd $HOME/SDK/XX-XX/Y.Y.Y/lib
% make
% cd $HOME/SDK/XX-XX/Y.Y.Y/examples
% make
At that point, you don't need the sources anymore and you can delete them.
You must have at least a 386 DX processor, and a DOS Protected Mode Interface (DPMI). For instance, Windows 95 provides a DPMI. You can also get one from here.
The GBDK distribution includes a batch file (gbdk.bat, by Mark Rawer) that automates many of the steps below, and that enables to install the GBDK distribution in any directory. You'll have to edit and modify the first lines of this batch file before executing it.
-d flag when invoking unzip):
C:> unzip -d GBDK.zip
This will create a directory (\SDK\XX-XX\Y-Y-Y, where XX-XX is the target and Y-Y-Y is the version number) with all the files you need in it. GBDK must be installed in the root of one of your drives (e.g., C:\SDK).
TMP or TEMP environment variable that points to a temporary directory.
C:> cd \SDK\XX-XX\Y-Y-Y\lib
C:> make
C:> cd \SDK\XX-XX\Y-Y-Y\examples
C:> make