To build any of the samples you will need to to install the "Build Support" folder, at the very least. For Integrated Development Environments (IDE), you should probably install the folder in the system path so all projects have access.
For MPW, you must install the folder in the root MPW directory, or in the "Scripts" folder (the UserStartup•OpenDoc script requires that). In addition, you will need to install the UserStartup•OpenDoc script from the “MPW Additions” folder.
That's all folks.
What is it?
The build support folder is a collection of build scripts (including BuildOpenDocPart), compiler settings, and default make rules for MPW based part development. In addition, there are generic prefix/pch files for C & C++ that can be used to generate precompiled headers (dump files); this will vastly improve your build times (and is actually necessary if you are using OpenDoc's utility files).
To adjust, or modify, compiler/linker behavior, locate the associated ".make" file in the folder and change the settings in that file.
For further discussion on the build system usage, refer to the “SampleCode Read Me”.