What C compiler do you want to use?
The Harbour developers consider GNU GCC to be the supported compiler of the Harbour project, use of the GCC port for your chosen platform is encouraged.
However, should you wish to use a different C compiler your contribution to make it work is more than welcome. Currently the following C compiler and platform combinations are supported by someone in the development team:
doc
directory of the Harbour source tree. If such documentation
is missing please consider asking about it on the
development mailing list and, once you've got the information, formatting
it and placing it in the doc
directory to help others who may wish to
ask the same question.