gcc/config/arm/linux-eabi.h

   1 /* Configuration file for ARM GNU/Linux EABI targets.
   2    Copyright (C) 2004, 2005, 2006, 2007, 2009, 2010, 2011, 2012
   3    Free Software Foundation, Inc.
   4    Contributed by CodeSourcery, LLC
   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 /* On EABI GNU/Linux, we want both the BPABI builtins and the
  23    GNU/Linux builtins.  */
  24 #undef  TARGET_OS_CPP_BUILTINS
  25 #define TARGET_OS_CPP_BUILTINS()                \
  26   do                                            \
  27     {                                           \
  28       TARGET_BPABI_CPP_BUILTINS();              \
  29       GNU_USER_TARGET_OS_CPP_BUILTINS();        \
  30       ANDROID_TARGET_OS_CPP_BUILTINS();         \
  31     }                                           \
  32   while (false)
  33
  34 /* We default to a soft-float ABI so that binaries can run on all
  35    target hardware.  If you override this to use the hard-float ABI then
  36    change the setting of GLIBC_DYNAMIC_LINKER_DEFAULT as well.  */
  37 #undef  TARGET_DEFAULT_FLOAT_ABI
  38 #define TARGET_DEFAULT_FLOAT_ABI ARM_FLOAT_ABI_SOFT
  39
  40 /* We default to the "aapcs-linux" ABI so that enums are int-sized by
  41    default.  */
  42 #undef  ARM_DEFAULT_ABI
  43 #define ARM_DEFAULT_ABI ARM_ABI_AAPCS_LINUX
  44
  45 /* Default to armv5t so that thumb shared libraries work.
  46    The ARM10TDMI core is the default for armv5t, so set
  47    SUBTARGET_CPU_DEFAULT to achieve this.  */
  48 #undef  SUBTARGET_CPU_DEFAULT
  49 #define SUBTARGET_CPU_DEFAULT TARGET_CPU_arm10tdmi
  50
  51 /* TARGET_BIG_ENDIAN_DEFAULT is set in
  52    config.gcc for big endian configurations.  */
  53 #undef  TARGET_LINKER_EMULATION
  54 #if TARGET_BIG_ENDIAN_DEFAULT
  55 #define TARGET_LINKER_EMULATION "armelfb_linux_eabi"
  56 #else
  57 #define TARGET_LINKER_EMULATION "armelf_linux_eabi"
  58 #endif
  59
  60 #undef  SUBTARGET_EXTRA_LINK_SPEC
  61 #define SUBTARGET_EXTRA_LINK_SPEC " -m " TARGET_LINKER_EMULATION
  62
  63 /* GNU/Linux on ARM currently supports three dynamic linkers:
  64    - ld-linux.so.2 - for the legacy ABI
  65    - ld-linux.so.3 - for the EABI-derived soft-float ABI
  66    - ld-linux-armhf.so.3 - for the EABI-derived hard-float ABI.
  67    All the dynamic linkers live in /lib.
  68    We default to soft-float, but this can be overridden by changing both
  69    GLIBC_DYNAMIC_LINKER_DEFAULT and TARGET_DEFAULT_FLOAT_ABI.  */
  70
  71 #undef  GLIBC_DYNAMIC_LINKER
  72 #define GLIBC_DYNAMIC_LINKER_SOFT_FLOAT "/lib/ld-linux.so.3"
  73 #define GLIBC_DYNAMIC_LINKER_HARD_FLOAT "/lib/ld-linux-armhf.so.3"
  74 #define GLIBC_DYNAMIC_LINKER_DEFAULT GLIBC_DYNAMIC_LINKER_SOFT_FLOAT
  75
  76 #define GLIBC_DYNAMIC_LINKER \
  77    "%{mfloat-abi=hard:" GLIBC_DYNAMIC_LINKER_HARD_FLOAT "} \
  78     %{mfloat-abi=soft*:" GLIBC_DYNAMIC_LINKER_SOFT_FLOAT "} \
  79     %{!mfloat-abi=*:" GLIBC_DYNAMIC_LINKER_DEFAULT "}"
  80
  81 /* At this point, bpabi.h will have clobbered LINK_SPEC.  We want to
  82    use the GNU/Linux version, not the generic BPABI version.  */
  83 #undef  LINK_SPEC
  84 #define LINK_SPEC BE8_LINK_SPEC                                         \
  85   LINUX_OR_ANDROID_LD (LINUX_TARGET_LINK_SPEC,                          \
  86                        LINUX_TARGET_LINK_SPEC " " ANDROID_LINK_SPEC)
  87
  88 #undef  CC1_SPEC
  89 #define CC1_SPEC                                                        \
  90   LINUX_OR_ANDROID_CC (GNU_USER_TARGET_CC1_SPEC,                        \
  91                        GNU_USER_TARGET_CC1_SPEC " " ANDROID_CC1_SPEC)
  92
  93 #define CC1PLUS_SPEC \
  94   LINUX_OR_ANDROID_CC ("", ANDROID_CC1PLUS_SPEC)
  95
  96 #undef  LIB_SPEC
  97 #define LIB_SPEC                                                        \
  98   LINUX_OR_ANDROID_LD (GNU_USER_TARGET_LIB_SPEC,                        \
  99                        GNU_USER_TARGET_LIB_SPEC " " ANDROID_LIB_SPEC)
 100
 101 #undef  STARTFILE_SPEC
 102 #define STARTFILE_SPEC \
 103   LINUX_OR_ANDROID_LD (GNU_USER_TARGET_STARTFILE_SPEC, ANDROID_STARTFILE_SPEC)
 104
 105 #undef  ENDFILE_SPEC
 106 #define ENDFILE_SPEC \
 107   LINUX_OR_ANDROID_LD (GNU_USER_TARGET_ENDFILE_SPEC, ANDROID_ENDFILE_SPEC)
 108
 109 /* Use the default LIBGCC_SPEC, not the version in linux-elf.h, as we
 110    do not use -lfloat.  */
 111 #undef LIBGCC_SPEC
 112
 113 /* Clear the instruction cache from `beg' to `end'.  This is
 114    implemented in lib1funcs.S, so ensure an error if this definition
 115    is used.  */
 116 #undef  CLEAR_INSN_CACHE
 117 #define CLEAR_INSN_CACHE(BEG, END) not_used
 118
 119 #define ARM_TARGET2_DWARF_FORMAT (DW_EH_PE_pcrel | DW_EH_PE_indirect)