New Formula: MPFI

Closes Homebrew/homebrew#11660.

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

Formula/mpfi.rb

@@ -0,0 +1,30 @@
+require 'formula'
+
+class Mpfi < Formula
+  homepage 'http://perso.ens-lyon.fr/nathalie.revol/software.html'
+  url 'https://gforge.inria.fr/frs/download.php/30130/mpfi-1.5.1.tar.gz'
+  sha1 '288302c0cdefe823cc3aa71de31c1da82eeb6ad0'
+
+  depends_on 'gmp'
+  depends_on 'mpfr'
+
+  option '32-bit'
+
+  def install
+    args = %W[--disable-dependency-tracking --prefix=#{prefix}]
+
+    # Build 32-bit where appropriate, and help configure find 64-bit CPUs
+    # Note: This logic should match what the GMP formula does.
+    if MacOS.prefer_64_bit? and not build.include? '32-bit'
+      ENV.m64
+      args << '--build=x86_64-apple-darwin'
+    else
+      ENV.m32
+      args << '--build=none-apple-darwin'
+    end
+
+    system './configure', *args
+    system 'make'
+    system 'make install'
+  end
+end