gcc/config/arm/uclinux-elf.h

   1 /* Definitions for ARM running ucLinux using ELF
   2    Copyright (C) 1999-2014 Free Software Foundation, Inc.
   3    Contributed by Philip Blundell <pb@nexus.co.uk>
   4
   5    This file is part of GCC.
   6
   7    GCC is free software; you can redistribute it and/or modify it
   8    under the terms of the GNU General Public License as published
   9    by the Free Software Foundation; either version 3, or (at your
  10    option) any later version.
  11
  12    GCC is distributed in the hope that it will be useful, but WITHOUT
  13    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  14    or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
  15    License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with GCC; see the file COPYING3.  If not see
  19    <http://www.gnu.org/licenses/>.  */
  20
  21 /* We don't want a PLT.  */
  22 #undef  NEED_PLT_RELOC
  23 #define NEED_PLT_RELOC 0
  24
  25 #undef  TARGET_DEFAULT
  26 #define TARGET_DEFAULT (MASK_SINGLE_PIC_BASE)
  27
  28 /* NOTE: The remaining definitions in this file are needed because uclinux
  29    does not use config/linux.h.  */
  30
  31 /* Add GNU/Linux builtins.  */
  32 #undef TARGET_OS_CPP_BUILTINS
  33 #define TARGET_OS_CPP_BUILTINS()                \
  34   do                                            \
  35     {                                           \
  36       builtin_define ("__uClinux__");           \
  37       builtin_define ("__gnu_linux__");         \
  38       builtin_define_std ("linux");             \
  39       builtin_define_std ("unix");              \
  40       builtin_assert ("system=linux");          \
  41       builtin_assert ("system=unix");           \
  42       builtin_assert ("system=posix");          \
  43     }                                           \
  44   while (false)
  45
  46 /* Do not assume anything about header files.  */
  47 #define NO_IMPLICIT_EXTERN_C
  48
  49 /* The GNU C++ standard library requires that these macros be defined.  */
  50 #undef CPLUSPLUS_CPP_SPEC
  51 #define CPLUSPLUS_CPP_SPEC "-D_GNU_SOURCE %(cpp)"
  52
  53 #undef SUBTARGET_EXTRA_LINK_SPEC
  54 #define SUBTARGET_EXTRA_LINK_SPEC " -m armelf_linux"
  55
  56 /* Now we define the strings used to build the spec file.  */
  57 #undef  STARTFILE_SPEC
  58 #define STARTFILE_SPEC  "crt1%O%s crti%O%s crtbegin%O%s"
  59
  60 #undef  ENDFILE_SPEC
  61 #define ENDFILE_SPEC    "crtend%O%s crtn%O%s"
  62
  63 #undef  CC1_SPEC
  64 #define CC1_SPEC "%{profile:-p}"
  65
  66 #undef LINK_GCC_C_SEQUENCE_SPEC
  67 #define LINK_GCC_C_SEQUENCE_SPEC \
  68   "%{static:--start-group} %G %L %{static:--end-group}%{!static:%G %L}"
  69
  70 /* Use --as-needed -lgcc_s for eh support.  */
  71 #ifdef HAVE_LD_AS_NEEDED
  72 #define USE_LD_AS_NEEDED 1
  73 #endif
  74
  75 #undef LINK_SPEC
  76 #define LINK_SPEC "%{mbig-endian:-EB} %{mlittle-endian:-EL} -X -elf2flt"
  77
  78 #undef  LIB_SPEC
  79 #define LIB_SPEC \
  80   "%{pthread:-lpthread} \
  81    %{shared:-lc} \
  82    %{!shared:%{profile:-lc_p}%{!profile:-lc}}"
  83
  84 #define TARGET_DEFAULT_WORD_RELOCATIONS 1