gmp 6.0.0a

Closes Homebrew/homebrew#28502.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>

Formula/gmp.rb

@@ -2,9 +2,9 @@ require 'formula'
 
 class Gmp < Formula
   homepage 'http://gmplib.org/'
-  url 'ftp://ftp.gmplib.org/pub/gmp/gmp-5.1.3.tar.bz2'
-  mirror 'http://ftp.gnu.org/gnu/gmp/gmp-5.1.3.tar.bz2'
-  sha1 'b35928e2927b272711fdfbf71b7cfd5f86a6b165'
+  url 'ftp://ftp.gmplib.org/pub/gmp/gmp-6.0.0a.tar.bz2'
+  mirror 'http://ftp.gnu.org/gnu/gmp/gmp-6.0.0a.tar.bz2'
+  sha1 '360802e3541a3da08ab4b55268c80f799939fddc'
 
   bottle do
     cellar :any
@@ -17,11 +17,6 @@ class Gmp < Formula
   option '32-bit'
   option :cxx11
 
-  # Patches gmp.h to remove the __need_size_t define, which
-  # was preventing libc++ builds from getting the ptrdiff_t type
-  # Applied upstream in http://gmplib.org:8000/gmp/raw-rev/6cd3658f5621
-  patch :DATA
-
   def install
     ENV.cxx11 if build.cxx11?
     args = ["--prefix=#{prefix}", "--enable-cxx"]
@@ -42,23 +37,3 @@ class Gmp < Formula
     system "make install"
   end
 end
-
-__END__
-diff --git a/gmp-h.in b/gmp-h.in
-index 7deb67a..240d663 100644
---- a/gmp-h.in
-+++ b/gmp-h.in
-@@ -46,13 +46,11 @@ along with the GNU MP Library.  If not, see http://www.gnu.org/licenses/.  */
- #ifndef __GNU_MP__
- #define __GNU_MP__ 5
- 
--#define __need_size_t  /* tell gcc stddef.h we only want size_t */
- #if defined (__cplusplus)
- #include <cstddef>     /* for size_t */
- #else
- #include <stddef.h>    /* for size_t */
- #endif
--#undef __need_size_t
- 
- /* Instantiated by configure. */
- #if ! defined (__GMP_WITHIN_CONFIGURE)