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From: "boger at us dot ibm.com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug go/64876] Regressions in gcc-testresults for powerpc64 gccgo in 5.0 due to change for static chain for closures (219776)
Date: Mon, 02 Feb 2015 19:52:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64876

boger at us dot ibm.com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |amodra at gcc dot gnu.org,
                   |                            |amodra at gmail dot com

--- Comment #1 from boger at us dot ibm.com ---
I found some notes I had from Alan on his change related to GO closures for
powerpc and found that all his changes for libffi are in but this gcc patch is
not in gcc trunk:

Index: gcc/config/rs6000/linux64.h
===================================================================
--- gcc/config/rs6000/linux64.h    (revision 217330)
+++ gcc/config/rs6000/linux64.h    (working copy)
@@ -115,6 +115,14 @@
           if (dot_symbols)                    \
         error ("-mcall-aixdesc incompatible with -mabi=elfv2"); \
         }                            \
+      if (DEFAULT_ABI == ABI_AIX                \
+          && strcmp (lang_hooks.name, "GNU Go") == 0)    \
+        {                            \
+          if (global_options_set.x_TARGET_POINTERS_TO_NESTED_FUNCTIONS \
+          && TARGET_POINTERS_TO_NESTED_FUNCTIONS)    \
+        error ("-mpointers-to-nested-functions is incompatible with Go"); \
+          TARGET_POINTERS_TO_NESTED_FUNCTIONS = 0;        \
+        }                            \
       if (rs6000_isa_flags & OPTION_MASK_RELOCATABLE)    \
         {                            \
           rs6000_isa_flags &= ~OPTION_MASK_RELOCATABLE;    \

After applying this patch and rebuilding the regressions go away.