I've built a Rubygem for installing NArray under MS Windows. Here's the gemspec-file which I used:
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Gem::Specification.new do |spec|
spec.name = 'narray'
spec.version = '0.5.9'
# LINUX_586, WIN32, or DARWIN
spec.platform = Gem::Platform::WIN32
spec.summary = "NArray is an n-dimensional numerical array class. Data types: integer/float/complexe/Ruby object.
Methods: array manipulation including multi-dimensional slicing, fast arithmetic/matrix operations, etc."
spec.authors = [ "Masahiro Tanaka" ]
spec.homepage = "http://rubyforge.org/projects/narray"
spec.require_paths = [ '.', 'lib', 'ext' ]
spec.files = [ "narray.gemspec", "lib/narray_ext.rb", "lib/nmatrix.rb",
"ext/narray.so" ]
end
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