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 #undef TARGET_VERSION
  25 #define TARGET_VERSION fprintf (stderr, " (68k uClinux)");
  26
  27 #undef STARTFILE_SPEC
  28 #define STARTFILE_SPEC \
  29 "%{mshared-library-id=0|!mshared-library-id=*: crt1.o%s ;: Scrt1.o%s} \
  30  crti.o%s crtbegin.o%s"
  31
  32 #undef ENDFILE_SPEC
  33 #define ENDFILE_SPEC "crtend.o%s crtn.o%s"
  34
  35 /* Override the default LIB_SPEC from gcc.c.  We don't currently support
  36    profiling, or libg.a.  */
  37 #undef LIB_SPEC
  38 #define LIB_SPEC \
  39 "%{mid-shared-library:%{!static-libc:-R libc.gdb%s}} -lc"
  40
  41 /* Default to using -elf2flt with no options.  */
  42 #undef LINK_SPEC
  43 #define LINK_SPEC \
  44 "%{!elf2flt*:-elf2flt} \
  45  %{mid-shared-library: \
  46    %{mshared-library-id=*:-shared-lib-id %*;:-shared-lib-id 0}}"
  47
  48 #undef TARGET_OS_CPP_BUILTINS
  49 #define TARGET_OS_CPP_BUILTINS()                                \
  50   do                                                            \
  51     {                                                           \
  52       LINUX_TARGET_OS_CPP_BUILTINS ();                          \
  53       builtin_define ("__uClinux__");                           \
  54       if (TARGET_ID_SHARED_LIBRARY)                             \
  55         {                                                       \
  56           builtin_define ("__ID_SHARED_LIBRARY__");             \
  57           /* Shared libraries and executables do not share      \
  58              typeinfo names.  */                                \
  59           builtin_define ("__GXX_MERGED_TYPEINFO_NAMES=0");     \
  60           builtin_define ("__GXX_TYPEINFO_EQUALITY_INLINE=0");  \
  61         }                                                       \
  62     }                                                           \
  63   while (0)
  64
  65 /* -msep-data is the default PIC mode on this target.  */
  66 #define DRIVER_SELF_SPECS \
  67   "%{fpie|fPIE|fpic|fPIC:%{!msep-data:%{!mid-shared-library: -msep-data}}}"
  68
  69 /* The uclinux binary format relies on relocations against a segment being
  70    within that segment.  Conservatively apply this rule to individual
  71    sections.  */
  72 #undef M68K_OFFSETS_MUST_BE_WITHIN_SECTIONS_P
  73 #define M68K_OFFSETS_MUST_BE_WITHIN_SECTIONS_P 1