obtained gcc-4.6.4.tar.bz2 from upstream website;upstream

verified gcc-4.6.4.tar.bz2.sig;
imported gcc-4.6.4 source tree from verified upstream tarball.

downloading a git-generated archive based on the 'upstream' tag
should provide you with a source tree that is binary identical
to the one extracted from the above tarball.

if you have obtained the source via the command 'git clone',
however, do note that line-endings of files in your working
directory might differ from line-endings of the respective
files in the upstream repository.

1 files changed, 82 insertions, 0 deletions

diff --git a/libstdc++-v3/config/cpu/arm/cxxabi_tweaks.h b/libstdc++-v3/config/cpu/arm/cxxabi_tweaks.h
new file mode 100644
index 000000000..2ac349dfc
--- /dev/null
+++ b/libstdc++-v3/config/cpu/arm/cxxabi_tweaks.h
@@ -0,0 +1,82 @@
+// Control various target specific ABI tweaks.  ARM version.
+
+// Copyright (C) 2004, 2006, 2008, 2009, 2011 Free Software Foundation, Inc.
+//
+// This file is part of the GNU ISO C++ Library.  This library 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.
+
+// This library 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.
+
+// Under Section 7 of GPL version 3, you are granted additional
+// permissions described in the GCC Runtime Library Exception, version
+// 3.1, as published by the Free Software Foundation.
+
+// You should have received a copy of the GNU General Public License and
+// a copy of the GCC Runtime Library Exception along with this program;
+// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+// <http://www.gnu.org/licenses/>.
+
+/** @file bits/cxxabi_tweaks.h
+ *  This is an internal header file, included by other library headers.
+ *  Do not attempt to use it directly. @headername{cxxabi.h}
+ */
+
+#ifndef _CXXABI_TWEAKS_H
+#define _CXXABI_TWEAKS_H 1
+
+#ifdef __cplusplus
+namespace __cxxabiv1
+{
+  extern "C" 
+  {
+#endif
+
+#ifdef __ARM_EABI__
+  // The ARM EABI uses the least significant bit of a 32-bit
+  // guard variable.  */
+#define _GLIBCXX_GUARD_TEST(x) ((*(x) & 1) != 0)
+#define _GLIBCXX_GUARD_SET(x) *(x) = 1
+#define _GLIBCXX_GUARD_BIT 1
+#define _GLIBCXX_GUARD_PENDING_BIT __guard_test_bit (1, 1)
+#define _GLIBCXX_GUARD_WAITING_BIT __guard_test_bit (2, 1)
+  typedef int __guard;
+
+  // We also want the element size in array cookies.
+#define _GLIBCXX_ELTSIZE_IN_COOKIE 1
+  
+  // __cxa_vec_ctor should return a pointer to the array.
+  typedef void * __cxa_vec_ctor_return_type;
+#define _GLIBCXX_CXA_VEC_CTOR_RETURN(x) return x
+  // Constructors and destructors return the "this" pointer.
+  typedef void * __cxa_cdtor_return_type;
+
+#else // __ARM_EABI__
+
+  // The generic ABI uses the first byte of a 64-bit guard variable.
+#define _GLIBCXX_GUARD_TEST(x) (*(char *) (x) != 0)
+#define _GLIBCXX_GUARD_SET(x) *(char *) (x) = 1
+#define _GLIBCXX_GUARD_BIT __guard_test_bit (0, 1)
+#define _GLIBCXX_GUARD_PENDING_BIT __guard_test_bit (1, 1)
+#define _GLIBCXX_GUARD_WAITING_BIT __guard_test_bit (2, 1)
+  __extension__ typedef int __guard __attribute__((mode (__DI__)));
+
+  // __cxa_vec_ctor has void return type.
+  typedef void __cxa_vec_ctor_return_type;
+#define _GLIBCXX_CXA_VEC_CTOR_RETURN(x) return
+  // Constructors and destructors do not return a value.
+  typedef void __cxa_cdtor_return_type;
+
+#endif //!__ARM_EABI__
+
+#ifdef __cplusplus
+  }
+} // namespace __cxxabiv1
+#endif
+
+#endif