gcc/config/arc/linux.h

   1 /* Target macros for arc*-*-linux targets.
   2
   3    Copyright (C) 2017-2018 Free Software Foundation, Inc.
   4
   5 This file is part of GCC.
   6
   7 GCC is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 3, or (at your option)
  10 any later version.
  11
  12 GCC is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public 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 /* Enable DWARF 2 exceptions.  */
  22 #undef DWARF2_UNWIND_INFO
  23 #define DWARF2_UNWIND_INFO 1
  24
  25 #define TARGET_OS_CPP_BUILTINS()                \
  26   do                                            \
  27     {                                           \
  28       GNU_USER_TARGET_OS_CPP_BUILTINS ();       \
  29     }                                           \
  30   while (0)
  31
  32 #define GLIBC_DYNAMIC_LINKER   "/lib/ld-linux-arc.so.2"
  33 #define UCLIBC_DYNAMIC_LINKER  "/lib/ld-uClibc.so.0"
  34
  35 /* Note that the default is to link against dynamic libraries, if they are
  36    available.  Override with -static.  */
  37 #undef LINK_SPEC
  38 #define LINK_SPEC "%{h*} \
  39   %{static:-Bstatic} \
  40   %{shared:-shared} \
  41   %{symbolic:-Bsymbolic} \
  42   %{!static: \
  43     %{rdynamic:-export-dynamic} \
  44     %{!shared:-dynamic-linker " GNU_USER_DYNAMIC_LINKER "}} \
  45   -X \
  46   %{mbig-endian:-EB} %{EB} %{EL} \
  47   %{!z:-z max-page-size=0x2000 -z common-page-size=0x2000} \
  48   %{mcpu=nps400:-marclinux_nps; :-marclinux}"
  49
  50 #undef STARTFILE_SPEC
  51 #define STARTFILE_SPEC                                                  \
  52   LINUX_OR_ANDROID_LD (GNU_USER_TARGET_STARTFILE_SPEC, ANDROID_STARTFILE_SPEC)
  53
  54 #undef ENDFILE_SPEC
  55 #define ENDFILE_SPEC                                                    \
  56   LINUX_OR_ANDROID_LD (GNU_USER_TARGET_ENDFILE_SPEC, ANDROID_ENDFILE_SPEC)
  57
  58 #undef LIB_SPEC
  59 #define LIB_SPEC  \
  60   "%{pthread:-lpthread} \
  61    %{shared:-lc} \
  62    %{!shared:%{profile:-lc_p}%{!profile:-lc}}"
  63
  64 #define TARGET_ASM_FILE_END file_end_indicate_exec_stack
  65
  66 /* No SDATA default for linux.  */
  67 #undef TARGET_SDATA_DEFAULT
  68 #define TARGET_SDATA_DEFAULT 0
  69
  70 /* We have medium calls.  */
  71 #undef TARGET_MMEDIUM_CALLS_DEFAULT
  72 #define TARGET_MMEDIUM_CALLS_DEFAULT 1
  73
  74 /* We do not have any MULTILIB_OPTIONS specified, so there are no
  75    MULTILIB_DEFAULTS.  */
  76 #undef  MULTILIB_DEFAULTS
  77
  78 /* Linux toolchains use r25 as the thread pointer register.  */
  79 #undef TARGET_ARC_TP_REGNO_DEFAULT
  80 #define TARGET_ARC_TP_REGNO_DEFAULT 25
  81
  82 #undef SUBTARGET_CPP_SPEC
  83 #define SUBTARGET_CPP_SPEC "\
  84    %{pthread:-D_REENTRANT} \
  85 "
  86
  87 /* Indexed loads are default off.  */
  88 #undef TARGET_INDEXED_LOADS_DEFAULT
  89 #define TARGET_INDEXED_LOADS_DEFAULT 0
  90
  91 /* Pre/post modify with register displacement are default off.  */
  92 #undef TARGET_AUTO_MODIFY_REG_DEFAULT
  93 #define TARGET_AUTO_MODIFY_REG_DEFAULT 0
  94
  95 #if DEFAULT_LIBC == LIBC_GLIBC
  96 /* Override linux.h LINK_EH_SPEC definition.
  97    Signalize that because we have fde-glibc, we don't need all C shared libs
  98    linked against -lgcc_s.  */
  99 #undef LINK_EH_SPEC
 100 #define LINK_EH_SPEC "--eh-frame-hdr"
 101 #endif