--- gcc-6-20151221/boehm-gc/include/private/gcconfig.h	2015-12-21 13:21:44.000000000 -0500
+++ gcc-6-20151221/boehm-gc/include/private/gcconfig.h.new	2015-12-21 13:20:26.000000000 -0500
@@ -1041,10 +1041,18 @@
 #   define MACH_TYPE "I386"
 #   if defined(__LP64__) || defined(_WIN64)
 #     define CPP_WORDSZ 64
-#     define ALIGNMENT 8
+#     if defined(__APPLE__)
+#       define ALIGNMENT 2
+#     else
+#       define ALIGNMENT 8
+#     endif
 #   else
 #     define CPP_WORDSZ 32
-#     define ALIGNMENT 4
+#     if defined(__APPLE__)
+#       define ALIGNMENT 2
+#     else
+#       define ALIGNMENT 4
+#     endif
 			/* Appears to hold for all "32 bit" compilers	*/
 			/* except Borland.  The -a4 option fixes 	*/
 			/* Borland.					*/
@@ -2005,10 +2013,18 @@
 # ifdef X86_64
 #   define MACH_TYPE "X86_64"
 #   ifdef __ILP32__
-#     define ALIGNMENT 4
+#     if defined(__APPLE__)
+#       define ALIGNMENT 2
+#     else
+#       define ALIGNMENT 4
+#     endif
 #     define CPP_WORDSZ 32
 #   else
-#     define ALIGNMENT 8
+#     if defined(__APPLE__)
+#       define ALIGNMENT 2
+#     else
+#       define ALIGNMENT 8
+#     endif
 #     define CPP_WORDSZ 64
 #   endif
 #   ifndef HBLKSIZE