gcc/config/m68k/rtemself.h

   1 /* Definitions for rtems targeting a Motorola m68k using elf.
   2    Copyright (C) 1999, 2000, National Research Council of Canada.
   3    Contributed by Charles-Antoine Gauthier (charles.gauthier@nrc.ca).
   4
   5 This file is part of GNU CC.
   6
   7 GNU CC is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 2, or (at your option)
  10 any later version.
  11
  12 GNU CC is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GNU CC; see the file COPYING.  If not, write to
  19 the Free Software Foundation, 59 Temple Place - Suite 330,
  20 Boston, MA 02111-1307, USA.  */
  21
  22
  23 #define MOTOROLA       /* Use Motorola syntax rather than MIT.  */
  24
  25 #include "m68k/m68020-elf.h"
  26
  27 /* Specify predefined symbols in preprocessor.  */
  28
  29 #undef CPP_PREDEFINES
  30 #define CPP_PREDEFINES "-Dmc68000 -Drtems -D__rtems__ -D__ELF__ \
  31    -Asystem(rtems) -Acpu(mc68000) -Acpu(m68k) -Amachine(m68k)"
  32
  33 /* Generate calls to memcpy, memcmp and memset.  */
  34 #ifndef TARGET_MEM_FUNCTIONS
  35 #define TARGET_MEM_FUNCTIONS
  36 #endif
  37
  38 /*
  39  *  Each RTEMS BSP provides its own crt0 and linker script.  Unfortunately
  40  *  this means that crt0 and the linker script are not available as
  41  *  each tool is configured.  Without a crt0 and linker script, m68k ELF
  42  *  targets do not successfully link "conftest.c" during the configuration
  43  *  process.  RTEMS supplies a crt0.c that provides all the symbols required
  44  *  to successfully link a program.  The resulting program will not run
  45  *  but this is enough to satisfy the autoconf macro AC_PROG_CC.
  46  *  Override STARTFILE_SPEC to use the fake crt0.o supplied by rtems.
  47  */
  48 #undef STARTFILE_SPEC
  49 #define STARTFILE_SPEC "crt0.o%s"
  50
  51 /*
  52  *  Redefine INIT_SECTION_ASM_OP and FINI_SECTION_ASM_OP. This is the easiest
  53  *  way to process constructors, destructors, and the exception frame
  54  *  information at startup.
  55  */
  56 #undef INIT_SECTION_ASM_OP
  57 #define INIT_SECTION_ASM_OP    ".section\t.init"
  58 #undef FINI_SECTION_ASM_OP
  59 #define FINI_SECTION_ASM_OP    ".section\t.fini"
  60
  61 #undef EH_FRAME_SECTION_ASM_OP
  62 #define EH_FRAME_SECTION_ASM_OP        ".section\t.eh_frame"
  63
  64 /* Do I need this? */
  65 #undef INVOKE__main
  66
  67 /* Get machine-independent configuration parameters for RTEMS.  */
  68 #include <rtems.h>
  69
  70 /* end of m68k/rtemself.h */