--- old/make/solaris/makefiles/amd64.make	2016-02-19 00:07:01.906732805 +0100
+++ new/make/solaris/makefiles/amd64.make	2016-02-19 00:07:01.798732799 +0100
@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2004, 2016, 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
@@ -34,6 +34,14 @@
 OPT_CFLAGS/generateOptoStub.o = -xO2
 # Temporary util SS12u1 C++ compiler is fixed
 OPT_CFLAGS/c1_LinearScan.o = -xO2
+
+# The debug flag is added to OPT_CFLAGS, but lost in case of per-file overrides
+# of OPT_CFLAGS. Restore it here.
+ifeq ($(ENABLE_FULL_DEBUG_SYMBOLS),1)
+  OPT_CFLAGS/generateOptoStub.o += -g0 -xs
+  OPT_CFLAGS/LinearScan.o += -g0 -xs
+endif
+
 else
 
 ifeq ("${Platform_compiler}", "gcc")