require "mkmf"

na_path = RbConfig::CONFIG["vendorarchdir"]
# begin
#   require "rubygems"
#   gem = true
# rescue LoadError
#   gem = false
# end
# if gem
#   if ( na_type = ENV["NARRAY_TYPE"] )
#     nas = [na_type]
#   else
#     nas = %w(narray numru-narray)
#   end
#   if Gem::Specification.respond_to?(:find_by_name)
#     nas.each do |na|
#       begin
#         if ( spec = Gem::Specification.find_by_name(na) )
#           na_type = na
#           na_path = spec.full_gem_path
#           case na_type
#           when "narray"
#             na_path = File.join(na_path, "src")
#           when "numru-narray"
#             na_path = File.join(na_path, "ext", "numru", "narray")
#           end
#           break
#         end
#       rescue LoadError
#       end
#     end
#   else
#     nas.each do |na|
#       if ( spec = Gem.source_index.find_name(na) ).any?
#         na_type = na
#         na_path = spec[0].full_gem_path
#         case na_type
#         when "narray"
#           na_path = File.join(na_path, "src")
#         when "numru-narray"
#           na_path = File.join(na_path, "ext", "numru", "narray")
#         end
#         break
#       end
#     end
#   end
# end

dir_config("narray", na_path, na_path)
unless have_header("narray.h")
  $stderr.print "narray.h does not found. Specify the path.\n"
  $stderr.print "e.g., gem install rb-grib -- --with-narray-include=path\n"
  exit(-1)
end

dir_config("eccodes")
if have_header("grib_api.h") && have_library("eccodes")
  create_makefile("numru/grib")
end