fileset without makefiles Open Source?!

[Harald Albrecht]

Lately I had a discussion with someone who wants to provide source code 
for his project, but without makefile(s). He intends to call it "Open 
Source". He also intends that people can look at the implementation and 
tweak it if they like but have to write the makefiles themselves if they 
want to use his work.

My simple question: can something like a set of source files complete 
but the makefile be called "Open Source"? Does "Open Source" cover this 
area, or am I on the wrong party here?

Thanks,
   Harald

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