apple-gcc42: 4.2.1-5666.3 (new formula).

Formula/apple-gcc42.rb

@@ -0,0 +1,51 @@
+require 'formula'
+
+class PkgDownloadStrategy < CurlDownloadStrategy
+  def stage
+    # The compilers are distributed as a OS X 10.5 package- a single flat xar
+    # archive instead of a bundle.
+    safe_system '/usr/bin/xar', '-xf', @tarball_path
+    chdir
+
+    # Clean up.
+    safe_system "mv *.pkg/Payload Payload.gz"
+    safe_system "ls | grep -v Payload | xargs rm -r"
+  end
+end
+
+class AppleGcc42 < Formula
+  homepage 'http://r.research.att.com/tools/'
+  url 'http://r.research.att.com/tools/gcc-42-5666.3-darwin11.pkg',
+    :using => PkgDownloadStrategy
+  version '4.2.1-5666.3'
+  sha1 '8fadde2a159082d6474fe9e325b6301e3c0bc84f'
+
+  option 'with-gfortran-symlink', 'Provide gfortran symlinks'
+
+  depends_on :macos => :lion
+
+  def install
+    safe_system "pax --insecure -rz -f Payload.gz -s ',./usr,#{prefix},'"
+
+    if build.include? 'with-gfortran-symlink'
+      safe_system "ln -sf #{bin}/gfortran-4.2 #{bin}/gfortran"
+      safe_system "ln -sf #{man1}/gfortran-4.2.1 #{man1}/gfortran.1"
+    end
+  end
+
+  def caveats
+    <<-EOS.undent
+      NOTE:
+      This formula provides components that were removed from XCode in the 4.2
+      release. There is no reason to install this formula if you are using a
+      version of XCode prior to 4.2.
+
+      This formula contains compilers built from Apple's GCC sources, build
+      5666.3, available from:
+
+        http://opensource.apple.com/tarballs/gcc
+
+      All compilers have a `-4.2` suffix. A GFortran compiler is also included.
+    EOS
+  end
+end