gcc/config/xtensa/linux.h

   1 /* Xtensa Linux configuration.
   2    Derived from the configuration for GCC for Intel i386 running Linux.
   3    Copyright (C) 2001, 2002 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 it under
   8 the terms of the GNU General Public License as published by the Free
   9 Software Foundation; either version 2, or (at your option) any later
  10 version.
  11
  12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  15 for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GCC; see the file COPYING.  If not, write to the Free
  19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
  20 02111-1307, USA.  */
  21
  22 #define TARGET_OS_CPP_BUILTINS()                                \
  23   do {                                                          \
  24     builtin_define_std ("linux");                               \
  25     builtin_define_std ("unix");                                \
  26     builtin_define ("__ELF__");                                 \
  27     builtin_define ("__gnu_linux__");                           \
  28     builtin_assert ("system=posix");                            \
  29     /* The GNU C++ standard library requires this.  */          \
  30     if (c_language == clk_cplusplus)                            \
  31       builtin_define ("_GNU_SOURCE");                           \
  32   } while (0)
  33
  34 #undef TARGET_VERSION
  35 #define TARGET_VERSION fputs (" (Xtensa GNU/Linux with ELF)", stderr);
  36
  37 #undef ASM_SPEC
  38 #define ASM_SPEC "%{v} %{mno-density:--no-density} \
  39                   %{mtext-section-literals:--text-section-literals} \
  40                   %{mno-text-section-literals:--no-text-section-literals} \
  41                   %{mtarget-align:--target-align} \
  42                   %{mno-target-align:--no-target-align} \
  43                   %{mlongcalls:--longcalls} \
  44                   %{mno-longcalls:--no-longcalls}"
  45
  46 #undef ASM_FINAL_SPEC
  47
  48 #undef LIB_SPEC
  49 #define LIB_SPEC \
  50   "%{shared: -lc} \
  51    %{!shared: %{pthread:-lpthread} \
  52    %{profile:-lc_p} %{!profile: -lc}}"
  53
  54 #undef LINK_SPEC
  55 #define LINK_SPEC \
  56  "%{shared:-shared} \
  57   %{!shared: \
  58     %{!ibcs: \
  59       %{!static: \
  60         %{rdynamic:-export-dynamic} \
  61         %{!dynamic-linker:-dynamic-linker /lib/ld.so.1}} \
  62       %{static:-static}}}"
  63
  64 #undef LOCAL_LABEL_PREFIX
  65 #define LOCAL_LABEL_PREFIX      "."
  66
  67 /* Always enable "-fpic" for Xtensa Linux.  */
  68 #define XTENSA_ALWAYS_PIC 1
  69
  70 /* Redefine the standard ELF version of ASM_DECLARE_FUNCTION_SIZE to
  71    allow adding the ".end literal_prefix" directive at the end of the
  72    function.  */
  73 #undef ASM_DECLARE_FUNCTION_SIZE
  74 #define ASM_DECLARE_FUNCTION_SIZE(FILE, FNAME, DECL)            \
  75   do                                                            \
  76     {                                                           \
  77       if (!flag_inhibit_size_directive)                         \
  78         ASM_OUTPUT_MEASURED_SIZE (FILE, FNAME);                 \
  79       XTENSA_DECLARE_FUNCTION_SIZE(FILE, FNAME, DECL);          \
  80     }                                                           \
  81   while (0)