mpfr - default to 64-bit because gmp does

Mpfr depends on gmp. When gmp is built, it defaults to 64-bit on capable
hardware. Mpfr does not, which causes a configure error.

See: http://www.mpfr.org/faq.html#no_libgmp

Signed-off-by: Adam Vandenberg <flangy@gmail.com>

1 files changed, 11 insertions, 0 deletions

diff --git a/Library/Formula/mpfr.rb b/Library/Formula/mpfr.rb
index 29d484ba5..a0b2f0057 100644
--- a/Library/Formula/mpfr.rb
+++ b/Library/Formula/mpfr.rb
@@ -7,11 +7,22 @@ class Mpfr <Formula
 
   depends_on 'gmp'
 
+  def options
+    [["--32-bit", "Force 32-bit."]]
+  end
+
   def patches
     {:p1 => ['http://www.mpfr.org/mpfr-3.0.0/allpatches']}
   end
 
   def install
+    if Hardware.is_32_bit? or ARGV.include? "--32-bit"
+      ENV.m32
+      args << "--host=none-apple-darwin"
+    else
+      ENV.m64
+    end
+
     system "./configure", "--disable-dependency-tracking", "--prefix=#{prefix}"
     system "make install"
   end