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diff --git a/gcc/config/darwin9.h b/gcc/config/darwin9.h
new file mode 100644
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--- /dev/null
+++ b/gcc/config/darwin9.h
@@ -0,0 +1,57 @@
+/* Target definitions for Darwin (Mac OS X) systems.
+   Copyright (C) 2006, 2007 Free Software Foundation, Inc.
+   Contributed by Apple Inc.
+
+This file is part of GCC.
+
+GCC is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 3, or (at your option)
+any later version.
+
+GCC is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GCC; see the file COPYING3.  If not see
+<http://www.gnu.org/licenses/>.  */
+
+/* Prefer DWARF2.  */
+#undef PREFERRED_DEBUGGING_TYPE
+#define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
+#define DARWIN_PREFER_DWARF
+
+/* Since DWARF2 is default, conditions for running dsymutil are different.  */
+#undef LINK_COMMAND_SPEC
+#define LINK_COMMAND_SPEC "\
+%{!fdump=*:%{!fsyntax-only:%{!c:%{!M:%{!MM:%{!E:%{!S:\
+    %(linker) %l %X %{d} %{s} %{t} %{Z} \
+    %{A} %{e*} %{m} %{r} %{x} \
+    %{o*}%{!o:-o a.out} \
+    %{!A:%{!nostdlib:%{!nostartfiles:%S}}} \
+    %{L*} %{fopenmp:%:include(libgomp.spec)%(link_gomp)}   \
+    %(link_libgcc) %o %{fprofile-arcs|fprofile-generate|coverage:-lgcov} \
+    %{!nostdlib:%{!nodefaultlibs:%(link_ssp) %G %L}} \
+    %{!A:%{!nostdlib:%{!nostartfiles:%E}}} %{T*} %{F*} }}}}}}}\n\
+%{!fdump=*:%{!fsyntax-only:%{!c:%{!M:%{!MM:%{!E:%{!S:\
+    %{.c|.cc|.C|.cpp|.cp|.c++|.cxx|.CPP|.m|.mm: \
+    %{g*:%{!gstabs*:%{!g0: dsymutil %{o*:%*}%{!o:a.out}}}}}}}}}}}}"
+
+/* libSystem contains unwind information for signal frames.  */
+#define DARWIN_LIBSYSTEM_HAS_UNWIND
+
+/* The linker can generate branch islands.  */
+#define DARWIN_LINKER_GENERATES_ISLANDS 1
+
+#undef  ASM_OUTPUT_ALIGNED_COMMON
+#define ASM_OUTPUT_ALIGNED_COMMON(FILE, NAME, SIZE, ALIGN)		\
+  do {									\
+    unsigned HOST_WIDE_INT _new_size = (SIZE);				\
+    fprintf ((FILE), ".comm ");						\
+    assemble_name ((FILE), (NAME));					\
+    if (_new_size == 0) _new_size = 1;					\
+    fprintf ((FILE), ","HOST_WIDE_INT_PRINT_UNSIGNED",%u\n",		\
+	     _new_size, floor_log2 ((ALIGN) / BITS_PER_UNIT));		\
+  } while (0)