libvpx 0.9.7-p1

This updates libvpx to 0.9.7-p1, which is their patched release.
The formula now sets --enable-pic, which seems justified.
The formula now sets --enable-vp8 to include all their vp8 code.
The formula now exposes four options to the user for setting
code coverage, memory tracking, post processing and visiualization.
Their software creates a native static library.  Their shared lib
will only build on elf32 atm.  This compiles and tests with all
three clang, llvm, and gcc from XCode-4.0.2 on x86_64.  This is a
library for handling video in the VPX codec format, related to
webm and Google.

Closes Homebrew/homebrew#8110.

Signed-off-by: Charlie Sharpsteen <source@sharpsteen.net>

Formula/libvpx.rb

@@ -1,18 +1,37 @@
 require 'formula'
 
 class Libvpx < Formula
-  url 'http://webm.googlecode.com/files/libvpx-v0.9.7.tar.bz2'
-  sha1 '639596df7182a93db83f61af8f5bb5b6a13dcf63'
+  url 'http://webm.googlecode.com/files/libvpx-v0.9.7-p1.tar.bz2'
+  sha1 'dacfefaf3363f781de43858f09cdd0b0d469e6fc'
   homepage 'http://www.webmproject.org/code/'
+  version '0.9.7-p1'
 
   depends_on 'yasm' => :build
 
+  def options
+    [
+      ['--gcov', 'Enable code coverage'],
+      ['--mem-tracker', 'Enable tracking memory usage'],
+      ['--postproc','Enable post processing'],
+      ['--visualizer', 'Enable post processing visualizer']
+    ]
+  end
+
   def install
-    args = ["--prefix=#{prefix}"]
+    macbuild = Pathname.pwd+'macbuild'
+    mkdir macbuild
+    Dir.chdir macbuild
+    args = ["--prefix=#{prefix}",
+            "--enable-pic",
+            "--enable-vp8"]
+    args << "--enable-gcov" if ARGV.include? "--gcov"
+    args << "--enable-mem-tracker" if ARGV.include? "--mem-tracker"
+    args << "--enable-postproc" if ARGV.include? "--postproc"
+    args << "--enable-postproc-visualizer" if ARGV.include? "--visualizer"
     # Configure detects 32-bit CPUs incorrectly.
     args << "--target=generic-gnu" unless MacOS.prefer_64_bit?
-
-    system "./configure", *args
+    system "../configure", *args
+    system "make"
     system "make install"
   end
 end