gcc/config/cris/cris_abi_symbol.c

   1 /* Define symbol to recognize CRIS ABI version 2, for a.out use.
   2    Contributed by Axis Communications.
   3    Written by Hans-Peter Nilsson <hp@axis.se>, c:a 1992.
   4
   5    Copyright (C) 2000, 2001, 2003 Free Software Foundation, Inc.
   6
   7 This file is part of GCC.
   8
   9 GCC is free software; you can redistribute it and/or modify it
  10 under the terms of the GNU General Public License as published by the
  11 Free Software Foundation; either version 2, or (at your option) any
  12 later version.
  13
  14 In addition to the permissions in the GNU General Public License, the
  15 Free Software Foundation gives you unlimited permission to link the
  16 compiled version of this file with other programs, and to distribute
  17 those programs without any restriction coming from the use of this
  18 file.  (The General Public License restrictions do apply in other
  19 respects; for example, they cover modification of the file, and
  20 distribution when not linked into another program.)
  21
  22 This file is distributed in the hope that it will be useful, but
  23 WITHOUT ANY WARRANTY; without even the implied warranty of
  24 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  25 General Public License for more details.
  26
  27 You should have received a copy of the GNU General Public License
  28 along with this program; see the file COPYING.  If not, write to
  29 the Free Software Foundation, 51 Franklin Street, Fifth Floor,
  30 Boston, MA 02110-1301, USA.
  31
  32    As a special exception, if you link this library with files, some of
  33    which are compiled with GCC, this library does not by itself cause
  34    the resulting object or executable to be covered by the GNU General
  35    Public License.
  36    This exception does not however invalidate any other reasons why
  37    the executable file or object might be covered by the GNU General
  38    Public License.  */
  39
  40 #include "tconfig.h"
  41 #include "tm.h"
  42
  43 #ifdef __AOUT__
  44
  45 /* ELF support was not released before the ABI was changed, so we
  46    restrict this awkwardness to a.out.  This symbol is for gdb to
  47    recognize, so it can debug both old and new programs successfully.  */
  48 __asm__ (".global " CRIS_ABI_VERSION_SYMBOL_STRING);
  49 __asm__ (".set " CRIS_ABI_VERSION_SYMBOL_STRING ",0");
  50
  51 #else  /* not __AOUT__ */
  52
  53 /* The file must not be empty (declaration/definition-wise) according to
  54    ISO, IIRC. */
  55 extern int _Dummy;
  56
  57 #endif /* not __AOUT__ */