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) 2003-2018 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 3, 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 COPYING3.  If not see
  21 <http://www.gnu.org/licenses/>.  */
  22
  23 #undef STARTFILE_SPEC
  24 #define STARTFILE_SPEC \
  25 "%{mshared-library-id=0|!mshared-library-id=*: crt1.o%s ;: Scrt1.o%s} \
  26  crti.o%s crtbegin.o%s"
  27
  28 #undef ENDFILE_SPEC
  29 #define ENDFILE_SPEC "crtend.o%s crtn.o%s"
  30
  31 /* Override the default LIB_SPEC from gcc.c.  We don't currently support
  32    profiling, or libg.a.  */
  33 #undef LIB_SPEC
  34 #define LIB_SPEC \
  35 "%{mid-shared-library:%{!static-libc:-R libc.gdb%s}} %{pthread:-lpthread} -lc"
  36
  37 /* Default to using -elf2flt with no options.  */
  38 #undef LINK_SPEC
  39 #define LINK_SPEC \
  40 "%{!elf2flt*:-elf2flt} \
  41  %{mid-shared-library: \
  42    %{mshared-library-id=*:-shared-lib-id %*;:-shared-lib-id 0}}"
  43
  44 #undef TARGET_OS_CPP_BUILTINS
  45 #define TARGET_OS_CPP_BUILTINS()                                \
  46   do                                                            \
  47     {                                                           \
  48       GNU_USER_TARGET_OS_CPP_BUILTINS ();                       \
  49       builtin_define ("__uClinux__");                           \
  50       if (TARGET_ID_SHARED_LIBRARY)                             \
  51         {                                                       \
  52           builtin_define ("__ID_SHARED_LIBRARY__");             \
  53           /* Shared libraries and executables do not share      \
  54              typeinfo names.  */                                \
  55           builtin_define ("__GXX_MERGED_TYPEINFO_NAMES=0");     \
  56           builtin_define ("__GXX_TYPEINFO_EQUALITY_INLINE=0");  \
  57         }                                                       \
  58     }                                                           \
  59   while (0)
  60
  61 /* -msep-data is the default PIC mode on this target.  */
  62 #define DRIVER_SELF_SPECS \
  63   "%{" FPIE_OR_FPIC_SPEC ":%{!msep-data:%{!mid-shared-library: -msep-data}}}"
  64
  65 /* The uclinux binary format relies on relocations against a segment being
  66    within that segment.  Conservatively apply this rule to individual
  67    sections.  */
  68 #undef M68K_OFFSETS_MUST_BE_WITHIN_SECTIONS_P
  69 #define M68K_OFFSETS_MUST_BE_WITHIN_SECTIONS_P 1