1 files changed, 106 insertions, 0 deletions
diff --git a/Library/Homebrew/hardware.rb b/Library/Homebrew/hardware.rb
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+++ b/Library/Homebrew/hardware.rb
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+#  Copyright 2009 Max Howell and other contributors.
+#
+#  Redistribution and use in source and binary forms, with or without
+#  modification, are permitted provided that the following conditions
+#  are met:
+#
+#  1. Redistributions of source code must retain the above copyright
+#     notice, this list of conditions and the following disclaimer.
+#  2. Redistributions in binary form must reproduce the above copyright
+#     notice, this list of conditions and the following disclaimer in the
+#     documentation and/or other materials provided with the distribution.
+#
+#  THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+#  IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+#  OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+#  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+#  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+#  NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+#  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+#  THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+#  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+#  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+#
+
+class Hardware
+  # These methods use info spewed out by sysctl.
+  # Look in <mach/machine.h> for decoding info.
+
+  def self.cpu_type
+    @@cpu_type ||= `/usr/sbin/sysctl -n hw.cputype`.to_i
+
+    case @@cpu_type
+    when 7
+      :intel
+    when 18
+      :ppc
+    else
+      :dunno
+    end
+  end
+
+  def self.intel_family
+    @@intel_family ||= `/usr/sbin/sysctl -n hw.cpufamily`.to_i
+
+    case @@intel_family
+    when 0x73d67300 # Yonah: Core Solo/Duo
+      :core
+    when 0x426f69ef # Merom: Core 2 Duo
+      :core2
+    when 0x78ea4fbc # Penryn
+      :penryn
+    when 0x6b5a4cd2 # Nehalem
+      :nehalem
+    else
+      :dunno
+    end
+  end
+
+  def self.processor_count
+    @@processor_count ||= `/usr/sbin/sysctl -n hw.ncpu`.to_i
+  end
+
+  def self.gcc_march # what to pass to gcc
+    @@gcc_march ||= if self.cpu_type == :intel
+      case self.intel_family
+      when :core
+        " -march=prescott"
+      when :core2, :penryn, :nehalem
+        # GCC 4.3 has a -march=core2, but this isn't 4.3 and nocona is correct
+        " -march=nocona"
+      end
+    else
+      ""
+    end
+  end
+
+  def self.gcc_msse # what to pass to gcc
+    # avoid sse4 for now in case it blows up
+    @@gcc_msse ||= if sysctl_bool("hw.optional.sse3")
+      " -msse3 -mfpmath=sse"
+    else
+      ""
+    end
+  end
+
+  def self.gcc_mmmx # what to pass to gcc
+    @@gcc_mmmx ||= if sysctl_bool("hw.optional.mmx")
+      " -mmmx"
+    else
+      ""
+    end
+  end
+
+  def self.is_64bit?
+    @@is_64bit ||= sysctl_bool("hw.cpu64bit_capable")
+  end
+
+protected
+  def self.sysctl_bool(property)
+    result = nil
+    IO.popen("/usr/sbin/sysctl -n #{property} 2>/dev/null") do |f|
+      result = f.gets.to_i # should be 0 or 1
+    end
+    $?.success? && result == 1 # sysctl call succeded and printed 1
+  end
+end