--- /dev/null	2015-07-01 15:35:01.000000000 -0400
+++ clang-wrapper	2015-01-06 14:48:29.000000000 -0500
@@ -0,0 +1,73 @@
+#!/usr/bin/python
+# vim:ts=4:sts=4:sw=4:et:tw=120
+# Explicitly using /usr/bin/python, not /usr/bin/env python here.
+
+##########
+# README #
+##########
+# This script wraps clang for GHC. GHC won't compile with clang's preprocessor unless the flags
+#   -Wno-invalid-pp-token -Wno-unicode -Wno-trigraphs
+# are passed (in addition to -E -undef -traditional, which are already passed in by GHC). Furthermore, if a compilation
+# language is passed and it is C (i.e., -x c), it is replaced with -x assembler-with-cpp.
+#
+# There is a popular script fulfilling the same purpose on Github, but the script does not specify a license and can
+# thus not be re-distributed and used in MacPorts. To avoid the same problem with this script further down the road:
+#
+###########
+# LICENSE #
+###########
+#
+# SPDX-License-Identifier: BSD-2-Clause
+#
+# Copyright (c) 2014, Clemens Lang <cal@macports.org>
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without modification, are permitted provided that the
+# following conditions are met:
+#
+# 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following
+#    disclaimer.
+#
+# 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following
+#    disclaimer in the documentation and/or other materials provided with the distribution.
+#
+#    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
+#    INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+#    DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+#    SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+#    SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+#    WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
+#    USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+import sys
+import os
+
+# To be reinplaced on installation, should hold the absolute path to clang
+__clang_path = '@clang@'
+
+# The set of flags to be added in preprocessor mode
+__clang_cpp_flags = ['-Wno-invalid-pp-token', '-Wno-unicode', '-Wno-trigraphs']
+
+def filterLanguageFlag(args):
+    lastArgWasLanguage = False
+    # Start at 1, because index 0 is the program basename, and we don't want to check that for -x
+    for idx in range(1, len(args)):
+        if lastArgWasLanguage and args[idx].lower() == 'c':
+            args[idx] = 'assembler-with-cpp'
+        lastArgWasLanguage = args[idx] == '-x'
+    return args
+
+# copy argv for modification
+args = sys.argv[:]
+
+# Don't check for -E, -undef, -traditional in sys.argv[0]
+# But check for the presence of all -E, -undef, and -traditional in the other flags
+if all(needle in sys.argv[1:] for needle in ['-E', '-undef', '-traditional']):
+    # We're in preprocessor mode, replace "-x c" with "-x assembler-with-cpp" and append __clang_cpp_flags
+    args = filterLanguageFlag(args)
+    args.extend(__clang_cpp_flags) 
+
+# Replace args[0] with the real path to clang and exec that instead
+args[0] = __clang_path
+#print >> sys.stderr, "Executing: %s" % repr(args)
+os.execv(args[0], args)