Method: #gplusplus_version

Defined in:
ext/nmatrix/extconf.rb

#gplusplus_version ⇒ Object 



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# File 'ext/nmatrix/extconf.rb', line 122

def gplusplus_version
  cxxvar = proc { |n| `#{CONFIG['CXX']} -E -dM - </dev/null | grep #{n}`.chomp.split(' ')[2] }
  major = cxxvar.call('__GNUC__')
  minor = cxxvar.call('__GNUC_MINOR__')
  patch = cxxvar.call('__GNUC_PATCHLEVEL__')

  raise("unable to determine g++ version (match to get version was nil)") if major.nil? || minor.nil? || patch.nil?

  "#{major}.#{minor}.#{patch}"
end