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From: "howarth.at.gcc at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug boehm-gc/66848] boehm-gc fails test suite on x86_64-apple-darwin15
Date: Sun, 11 Oct 2015 19:45:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66848

--- Comment #11 from Jack Howarth <howarth.at.gcc at gmail dot com> ---
Changing...

--- gcc-5.2.0.orig/boehm-gc/include/private/gcconfig.h  2013-12-21
15:42:39.000000000 -0500
+++ gcc-5.2.0/boehm-gc/include/private/gcconfig.h       2015-10-11
15:41:26.000000000 -0400
@@ -1041,10 +1041,10 @@
 #   define MACH_TYPE "I386"
 #   if defined(__LP64__) || defined(_WIN64)
 #     define CPP_WORDSZ 64
-#     define ALIGNMENT 8
+#     define ALIGNMENT 2
 #   else
 #     define CPP_WORDSZ 32
-#     define ALIGNMENT 4
+#     define ALIGNMENT 2
                        /* Appears to hold for all "32 bit" compilers   */
                        /* except Borland.  The -a4 option fixes        */
                        /* Borland.                                     */
@@ -2005,10 +2005,10 @@
 # ifdef X86_64
 #   define MACH_TYPE "X86_64"
 #   ifdef __ILP32__
-#     define ALIGNMENT 4
+#     define ALIGNMENT 2
 #     define CPP_WORDSZ 32
 #   else
-#     define ALIGNMENT 8
+#     define ALIGNMENT 2
 #     define CPP_WORDSZ 64
 #   endif
 #   ifndef HBLKSIZE

suppress the failures in the boehm-gc test suite on darwin15's unwinder (as
well as using ALIGNMENT 1). Note that ALIGNMENT 4 on 64-bit doesn't suppress
the boehm-gc test suite failures.