eigen: add :universal option

Add the `option :universal` to eigen. Tested with clang and llvm
from XCode-4.4.1.

Closes #14304.

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

1 files changed, 6 insertions, 3 deletions

diff --git a/Library/Formula/eigen.rb b/Library/Formula/eigen.rb
index 46fb9b720..9bea74fc3 100644
--- a/Library/Formula/eigen.rb
+++ b/Library/Formula/eigen.rb
@@ -7,15 +7,18 @@ class Eigen < Formula
 
   depends_on 'cmake' => :build
 
+  option :universal
+
   def install
     ENV.fortran
+    ENV.universal_binary if build.universal?
     mkdir 'eigen-build' do
       args = std_cmake_args
       args.delete '-DCMAKE_BUILD_TYPE=None'
       args << '-DCMAKE_BUILD_TYPE=Release'
-
-      system "cmake", "..", "-Dpkg_config_libdir=#{lib}", *args
-      system "make install"
+      args << "-Dpkg_config_libdir=#{lib}" << '..'
+      system 'cmake', *args
+      system 'make install'
     end
   end
 end