8303949: gcc10 warning Linux ppc64le - note: the layout of aggregates containing vectors with 8-byte alignment has changed in GCC 5

Reviewed-by: phh
Backport-of: a32ee5dd8b5d0b65b39d7a3f8bedc7c099987f6f

Author: MBaesken

make/autoconf/flags-cflags.m4

@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2011, 2021, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2011, 2023, Oracle and/or its affiliates. All rights reserved.
 # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 #
 # This code is free software; you can redistribute it and/or modify it
@@ -188,6 +188,10 @@ AC_DEFUN([FLAGS_SETUP_WARNINGS],
       WARNINGS_ENABLE_ALL_CXXFLAGS="$WARNINGS_ENABLE_ALL_CFLAGS $WARNINGS_ENABLE_ADDITIONAL_CXX"
 
       DISABLED_WARNINGS="unused-parameter unused"
+      # gcc10/11 on ppc generate lots of abi warnings about layout of aggregates containing vectors
+      if test "x$OPENJDK_TARGET_CPU_ARCH" = "xppc"; then
+        DISABLED_WARNINGS="$DISABLED_WARNINGS psabi"
+      fi
       ;;
 
     clang)