brew/Library/Homebrew/extend/os/linux/hardware/cpu.rb

module Hardware
  class CPU
    extend self

    OPTIMIZATION_FLAGS = {
      :penryn => "-march=core2 -msse4.1",
      :core2 => "-march=core2",
      :core => "-march=prescott"
    }.freeze
    def optimization_flags
      OPTIMIZATION_FLAGS
    end

    # Linux supports x86 only, and universal archs do not apply
    def arch_32_bit
      :i386
    end

    def arch_64_bit
      :x86_64
    end

    def universal_archs
      [].extend ArchitectureListExtension
    end

    def cpuinfo
      @cpuinfo ||= File.read("/proc/cpuinfo")
    end

    def type
      @type ||= if cpuinfo =~ /Intel|AMD/
        :intel
      else
        :dunno
      end
    end

    def family
      cpuinfo[/^cpu family\s*: ([0-9]+)/, 1].to_i
    end
    alias_method :intel_family, :family

    def cores
      cpuinfo.scan(/^processor/).size
    end

    def flags
      @flags ||= cpuinfo[/^flags.*/, 0].split
    end

    # Compatibility with Mac method, which returns lowercase symbols
    # instead of strings
    def features
      @features ||= flags[1..-1].map(&:intern)
    end

    %w[aes altivec avx avx2 lm sse3 ssse3 sse4 sse4_2].each do |flag|
      define_method(flag + "?") { flags.include? flag }
    end
    alias_method :is_64_bit?, :lm?

    def bits
      is_64_bit? ? 64 : 32
    end
  end
end