gcc/config/arm/uclinux-elf.h

   1 /* Definitions for ARM running ucLinux using ELF
   2    Copyright (C) 1999-2016 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    Under Section 7 of GPL version 3, you are granted additional
  18    permissions described in the GCC Runtime Library Exception, version
  19    3.1, as published by the Free Software Foundation.
  20
  21    You should have received a copy of the GNU General Public License and
  22    a copy of the GCC Runtime Library Exception along with this program;
  23    see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  24    <http://www.gnu.org/licenses/>.  */
  25
  26 /* We don't want a PLT.  */
  27 #undef  NEED_PLT_RELOC
  28 #define NEED_PLT_RELOC 0
  29
  30 #undef  TARGET_DEFAULT
  31 #define TARGET_DEFAULT (MASK_SINGLE_PIC_BASE)
  32
  33 /* NOTE: The remaining definitions in this file are needed because uclinux
  34    does not use config/linux.h.  */
  35
  36 /* Add GNU/Linux builtins.  */
  37 #undef TARGET_OS_CPP_BUILTINS
  38 #define TARGET_OS_CPP_BUILTINS()                \
  39   do                                            \
  40     {                                           \
  41       builtin_define ("__uClinux__");           \
  42       builtin_define ("__gnu_linux__");         \
  43       builtin_define_std ("linux");             \
  44       builtin_define_std ("unix");              \
  45       builtin_assert ("system=linux");          \
  46       builtin_assert ("system=unix");           \
  47       builtin_assert ("system=posix");          \
  48     }                                           \
  49   while (false)
  50
  51 /* Do not assume anything about header files.  */
  52 #define NO_IMPLICIT_EXTERN_C
  53
  54 /* The GNU C++ standard library requires that these macros be defined.  */
  55 #undef CPLUSPLUS_CPP_SPEC
  56 #define CPLUSPLUS_CPP_SPEC "-D_GNU_SOURCE %(cpp)"
  57
  58 #undef SUBTARGET_EXTRA_LINK_SPEC
  59 #define SUBTARGET_EXTRA_LINK_SPEC " -m armelf_linux"
  60
  61 /* Now we define the strings used to build the spec file.  */
  62 #undef  STARTFILE_SPEC
  63 #define STARTFILE_SPEC  "crt1%O%s crti%O%s crtbegin%O%s"
  64
  65 #undef  ENDFILE_SPEC
  66 #define ENDFILE_SPEC    "crtend%O%s crtn%O%s"
  67
  68 #undef  CC1_SPEC
  69 #define CC1_SPEC "%{profile:-p}"
  70
  71 #undef LINK_GCC_C_SEQUENCE_SPEC
  72 #define LINK_GCC_C_SEQUENCE_SPEC \
  73   "%{static:--start-group} %G %L %{static:--end-group}%{!static:%G %L}"
  74
  75 /* Use --as-needed -lgcc_s for eh support.  */
  76 #ifdef HAVE_LD_AS_NEEDED
  77 #define USE_LD_AS_NEEDED 1
  78 #endif
  79
  80 #undef LINK_SPEC
  81 #define LINK_SPEC "%{mbig-endian:-EB} %{mlittle-endian:-EL} -X -elf2flt"
  82
  83 #undef  LIB_SPEC
  84 #define LIB_SPEC \
  85   "%{pthread:-lpthread} \
  86    %{shared:-lc} \
  87    %{!shared:%{profile:-lc_p}%{!profile:-lc}}"
  88
  89 #define TARGET_DEFAULT_WORD_RELOCATIONS 1