architecture_list: add new module.

remove old mach.rb, replace with cctools_mach.rb and prune ELF case
move ArchitectureListExtension to separate file ELF support is
maintained in Linuxbrew

Library/Homebrew/os/mac/architecture_list.rb

@@ -0,0 +1,52 @@
+module ArchitectureListExtension
+  # @private
+  def fat?
+    length > 1
+  end
+
+  # @private
+  def intel_universal?
+    intersects_all?(Hardware::CPU::INTEL_32BIT_ARCHS, Hardware::CPU::INTEL_64BIT_ARCHS)
+  end
+
+  # @private
+  def ppc_universal?
+    intersects_all?(Hardware::CPU::PPC_32BIT_ARCHS, Hardware::CPU::PPC_64BIT_ARCHS)
+  end
+
+  # Old-style 32-bit PPC/Intel universal, e.g. ppc7400 and i386
+  # @private
+  def cross_universal?
+    intersects_all?(Hardware::CPU::PPC_32BIT_ARCHS, Hardware::CPU::INTEL_32BIT_ARCHS)
+  end
+
+  # @private
+  def universal?
+    intel_universal? || ppc_universal? || cross_universal?
+  end
+
+  def ppc?
+    (Hardware::CPU::PPC_32BIT_ARCHS+Hardware::CPU::PPC_64BIT_ARCHS).any? { |a| self.include? a }
+  end
+
+  # @private
+  def remove_ppc!
+    (Hardware::CPU::PPC_32BIT_ARCHS+Hardware::CPU::PPC_64BIT_ARCHS).each { |a| delete a }
+  end
+
+  def as_arch_flags
+    collect { |a| "-arch #{a}" }.join(" ")
+  end
+
+  def as_cmake_arch_flags
+    join(";")
+  end
+
+  protected
+
+  def intersects_all?(*set)
+    set.all? do |archset|
+      archset.any? { |a| self.include? a }
+    end
+  end
+end

Library/Homebrew/os/mac/cctools_mach.rb

@@ -1,57 +1,6 @@
-module ArchitectureListExtension
+require "os/mac/architecture_list"
-  # @private
-  def fat?
-    length > 1
-  end
 
-  # @private
+module CctoolsMachO
-  def intel_universal?
-    intersects_all?(Hardware::CPU::INTEL_32BIT_ARCHS, Hardware::CPU::INTEL_64BIT_ARCHS)
-  end
-
-  # @private
-  def ppc_universal?
-    intersects_all?(Hardware::CPU::PPC_32BIT_ARCHS, Hardware::CPU::PPC_64BIT_ARCHS)
-  end
-
-  # Old-style 32-bit PPC/Intel universal, e.g. ppc7400 and i386
-  # @private
-  def cross_universal?
-    intersects_all?(Hardware::CPU::PPC_32BIT_ARCHS, Hardware::CPU::INTEL_32BIT_ARCHS)
-  end
-
-  # @private
-  def universal?
-    intel_universal? || ppc_universal? || cross_universal?
-  end
-
-  def ppc?
-    (Hardware::CPU::PPC_32BIT_ARCHS+Hardware::CPU::PPC_64BIT_ARCHS).any? { |a| self.include? a }
-  end
-
-  # @private
-  def remove_ppc!
-    (Hardware::CPU::PPC_32BIT_ARCHS+Hardware::CPU::PPC_64BIT_ARCHS).each { |a| delete a }
-  end
-
-  def as_arch_flags
-    collect { |a| "-arch #{a}" }.join(" ")
-  end
-
-  def as_cmake_arch_flags
-    join(";")
-  end
-
-  protected
-
-  def intersects_all?(*set)
-    set.all? do |archset|
-      archset.any? { |a| self.include? a }
-    end
-  end
-end
-
-module MachO
   # @private
   OTOOL_RX = /\t(.*) \(compatibility version (?:\d+\.)*\d+, current version (?:\d+\.)*\d+\)/
 
@@ -77,8 +26,6 @@ module MachO
         end
       when 0xcefaedfe, 0xcffaedfe, 0xfeedface, 0xfeedfacf # Single arch
         offsets << 0
-      when 0x7f454c46 # ELF
-        mach_data << { :arch => :x86_64, :type => :executable }
       else
         raise "Not a Mach-O binary."
       end