gcc/config/arm/uclinux-elf.h

   1 /* Definitions for ARM running ucLinux using ELF
   2    Copyright (C) 1999, 2001, 2004, 2005, 2007, 2008, 2009, 2011
   3    Free Software Foundation, Inc.
   4    Contributed by Philip Blundell <pb@nexus.co.uk>
   5
   6    This file is part of GCC.
   7
   8    GCC is free software; you can redistribute it and/or modify it
   9    under the terms of the GNU General Public License as published
  10    by the Free Software Foundation; either version 3, or (at your
  11    option) any later version.
  12
  13    GCC is distributed in the hope that it will be useful, but WITHOUT
  14    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  15    or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
  16    License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with GCC; see the file COPYING3.  If not see
  20    <http://www.gnu.org/licenses/>.  */
  21
  22 /* We don't want a PLT.  */
  23 #undef  NEED_PLT_RELOC
  24 #define NEED_PLT_RELOC 0
  25
  26 #undef  TARGET_DEFAULT
  27 #define TARGET_DEFAULT (MASK_SINGLE_PIC_BASE)
  28
  29 /* NOTE: The remaining definitions in this file are needed because uclinux
  30    does not use config/linux.h.  */
  31
  32 /* Add GNU/Linux builtins.  */
  33 #undef TARGET_OS_CPP_BUILTINS
  34 #define TARGET_OS_CPP_BUILTINS()                \
  35   do                                            \
  36     {                                           \
  37       builtin_define ("__uClinux__");           \
  38       builtin_define ("__gnu_linux__");         \
  39       builtin_define_std ("linux");             \
  40       builtin_define_std ("unix");              \
  41       builtin_assert ("system=linux");          \
  42       builtin_assert ("system=unix");           \
  43       builtin_assert ("system=posix");          \
  44     }                                           \
  45   while (false)
  46
  47 /* Do not assume anything about header files.  */
  48 #define NO_IMPLICIT_EXTERN_C
  49
  50 /* The GNU C++ standard library requires that these macros be defined.  */
  51 #undef CPLUSPLUS_CPP_SPEC
  52 #define CPLUSPLUS_CPP_SPEC "-D_GNU_SOURCE %(cpp)"
  53
  54 #undef SUBTARGET_EXTRA_LINK_SPEC
  55 #define SUBTARGET_EXTRA_LINK_SPEC " -m armelf_linux"
  56
  57 /* Now we define the strings used to build the spec file.  */
  58 #undef  STARTFILE_SPEC
  59 #define STARTFILE_SPEC  "crt1%O%s crti%O%s crtbegin%O%s"
  60
  61 #undef  ENDFILE_SPEC
  62 #define ENDFILE_SPEC    "crtend%O%s crtn%O%s"
  63
  64 #undef  CC1_SPEC
  65 #define CC1_SPEC "%{profile:-p}"
  66
  67 #undef LINK_GCC_C_SEQUENCE_SPEC
  68 #define LINK_GCC_C_SEQUENCE_SPEC \
  69   "%{static:--start-group} %G %L %{static:--end-group}%{!static:%G}"
  70
  71 /* Use --as-needed -lgcc_s for eh support.  */
  72 #ifdef HAVE_LD_AS_NEEDED
  73 #define USE_LD_AS_NEEDED 1
  74 #endif
  75
  76 #undef LINK_SPEC
  77 #define LINK_SPEC "%{mbig-endian:-EB} %{mlittle-endian:-EL} -X -elf2flt"
  78
  79 #undef  LIB_SPEC
  80 #define LIB_SPEC \
  81   "%{pthread:-lpthread} \
  82    %{shared:-lc} \
  83    %{!shared:%{profile:-lc_p}%{!profile:-lc}}"
  84
  85 #define TARGET_DEFAULT_WORD_RELOCATIONS 1