gcc/config/m68k/uclinux.h

   1 /* Definitions of target machine for GCC.  m68k/ColdFire based uClinux system
   2    using ELF objects with special linker post-processing to produce FLAT
   3    executables.
   4
   5    Copyright (C) 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
  10 it under the terms of the GNU General Public License as published by
  11 the Free Software Foundation; either version 2, or (at your option)
  12 any later version.
  13
  14 GCC is distributed in the hope that it will be useful,
  15 but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 GNU General Public License for more details.
  18
  19 You should have received a copy of the GNU General Public License
  20 along with GCC; see the file COPYING.  If not, write to
  21 the Free Software Foundation, 51 Franklin Street, Fifth Floor,
  22 Boston, MA 02110-1301, USA.  */
  23
  24
  25 /* Undo the definition of STARTFILE_SPEC from m68kelf.h so we'll
  26    pick the default from gcc.c (just link crt0.o from multilib dir).  */
  27 #undef  STARTFILE_SPEC
  28
  29 /* Override the default LIB_SPEC from gcc.c.  We don't currently support
  30    profiling, or libg.a.  */
  31 #undef LIB_SPEC
  32 #define LIB_SPEC "\
  33 %{mid-shared-library:-R libc.gdb%s -elf2flt -shared-lib-id 0} -lc \
  34 "
  35
  36 /* we don't want a .eh_frame section.  */
  37 #define EH_FRAME_IN_DATA_SECTION
  38
  39 /* ??? Quick hack to get constructors working.  Make this look more like a
  40    COFF target, so the existing dejagnu/libgloss support works.  A better
  41    solution would be to make the necessary dejagnu and libgloss changes so
  42    that we can use normal the ELF constructor mechanism.  */
  43 #undef INIT_SECTION_ASM_OP
  44 #undef FINI_SECTION_ASM_OP
  45 #undef ENDFILE_SPEC
  46 #define ENDFILE_SPEC ""
  47
  48 /* Bring in standard linux defines */
  49 #undef TARGET_OS_CPP_BUILTINS
  50 #define TARGET_OS_CPP_BUILTINS()                \
  51   do                                            \
  52     {                                           \
  53         builtin_define_std ("mc68000");         \
  54         builtin_define ("__uClinux__");         \
  55         builtin_define_std ("linux");           \
  56         builtin_define_std ("unix");            \
  57         builtin_define ("__gnu_linux__");       \
  58         builtin_assert ("system=linux");        \
  59         builtin_assert ("system=unix");         \
  60         builtin_assert ("system=posix");        \
  61         if (TARGET_ID_SHARED_LIBRARY)           \
  62           builtin_define ("__ID_SHARED_LIBRARY__"); \
  63     }                                           \
  64   while (0)
  65