Formula for GMP

GMP is a free library for arbitrary precision arithmetic, operating on
signed integers, rational numbers, and floating point numbers. There is
no practical limit to the precision except the ones implied by the available
memory in the machine GMP runs on. GMP has a rich set of functions, and the
functions have a regular interface.

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diff --git a/Library/Formula/gmp.rb b/Library/Formula/gmp.rb
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+++ b/Library/Formula/gmp.rb
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+require 'brewkit'
+
+class Gmp <Formula
+  url 'ftp://ftp.gnu.org/gnu/gmp/gmp-4.3.1.tar.bz2'
+  homepage 'http://gmplib.org/'
+  sha1 'acbd1edc61230b1457e9742136994110e4f381b2'
+
+  def install
+    if MACOS_VERSION == 10.6
+      # On OS X 10.6, some tests fail under LLVM
+      ENV.gcc_4_2
+    end
+
+    system "./configure", "--prefix=#{prefix}", "--disable-debug", "--disable-dependency-tracking"
+    system "make install"
+    
+    # Verify that the library compiled correctly.
+    system "make check"
+  end
+end