winexe: fix build on Mavericks

Closes Homebrew/homebrew#26855.

Formula/winexe.rb

@@ -14,7 +14,23 @@ class Winexe < Formula
   # Added by @vspy
   patch :DATA
 
+  # This Winexe uses "getopts.pl" that is no longer supplied with newer
+  # versions of Perl
+  resource "Perl4::CoreLibs" do
+    url "http://search.cpan.org/CPAN/authors/id/Z/ZE/ZEFRAM/Perl4-CoreLibs-0.003.tar.gz"
+    sha1 "ad4c5a9fa8da4f461dc774e5c53136a55413ef2f"
+  end
+
   def install
+    if MacOS.version >= :mavericks
+      ENV.prepend_create_path 'PERL5LIB', libexec+'lib/perl5'
+      resource("Perl4::CoreLibs").stage do
+        system "perl", "Makefile.PL", "INSTALL_BASE=#{libexec}"
+        system "make"
+        system "make", "install"
+      end
+    end
+
     cd "source4" do
       system "./autogen.sh"
       system "./configure", "--enable-fhs"