gnu/dist/gcc4/gcc/config/alpha/linux.h

   1 /* Definitions of target machine for GNU compiler,
   2    for Alpha Linux-based GNU systems.
   3    Copyright (C) 1996, 1997, 1998, 2002, 2003, 2004, 2005
   4    Free Software Foundation, Inc.
   5    Contributed by Richard Henderson.
   6
   7 This file is part of GCC.
   8
   9 GCC is free software; you can redistribute it and/or modify
  10 it under the terms of the GNU General Public License as published by
  11 the Free Software Foundation; either version 2, or (at your option)
  12 any later version.
  13
  14 GCC is distributed in the hope that it will be useful,
  15 but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 GNU General Public License for more details.
  18
  19 You should have received a copy of the GNU General Public License
  20 along with GCC; see the file COPYING.  If not, write to
  21 the Free Software Foundation, 51 Franklin Street, Fifth Floor,
  22 Boston, MA 02110-1301, USA.  */
  23
  24 #undef TARGET_DEFAULT
  25 #define TARGET_DEFAULT (MASK_FPREGS | MASK_GAS)
  26
  27 #define TARGET_OS_CPP_BUILTINS()                                \
  28     do {                                                        \
  29         builtin_define ("__gnu_linux__");                       \
  30         builtin_define ("_LONGLONG");                           \
  31         builtin_define_std ("linux");                           \
  32         builtin_define_std ("unix");                            \
  33         builtin_assert ("system=linux");                        \
  34         builtin_assert ("system=unix");                         \
  35         builtin_assert ("system=posix");                        \
  36         /* The GNU C++ standard library requires this.  */      \
  37         if (c_dialect_cxx ())                                   \
  38           builtin_define ("_GNU_SOURCE");                       \
  39         if (flag_pic)                                           \
  40           {                                                     \
  41                 builtin_define ("__PIC__");                     \
  42                 builtin_define ("__pic__");                     \
  43           }                                                     \
  44     } while (0)
  45
  46 #undef LIB_SPEC
  47 #define LIB_SPEC \
  48   "%{pthread:-lpthread} \
  49    %{shared:-lc} \
  50    %{!shared: %{profile:-lc_p}%{!profile:-lc}}"
  51
  52 #undef CPP_SPEC
  53 #define CPP_SPEC "%{posix:-D_POSIX_SOURCE} %{pthread:-D_REENTRANT}"
  54
  55 /* Show that we need a GP when profiling.  */
  56 #undef TARGET_PROFILING_NEEDS_GP
  57 #define TARGET_PROFILING_NEEDS_GP 1
  58
  59 /* Don't care about faults in the prologue.  */
  60 #undef TARGET_CAN_FAULT_IN_PROLOGUE
  61 #define TARGET_CAN_FAULT_IN_PROLOGUE 1
  62
  63 /* OS fixes up EV5 data fault on prefetch.  */
  64 #undef TARGET_FIXUP_EV5_PREFETCH
  65 #define TARGET_FIXUP_EV5_PREFETCH 1
  66
  67 #undef WCHAR_TYPE
  68 #define WCHAR_TYPE "int"
  69
  70 /* Define this so that all GNU/Linux targets handle the same pragmas.  */
  71 #define HANDLE_PRAGMA_PACK_PUSH_POP
  72
  73 /* Determine whether the entire c99 runtime is present in the
  74    runtime library.  */
  75 #define TARGET_C99_FUNCTIONS 1
  76
  77 #define TARGET_POSIX_IO
  78
  79 #define LINK_GCC_C_SEQUENCE_SPEC \
  80   "%{static:--start-group} %G %L %{static:--end-group}%{!static:%G}"
  81
  82 /* Use --as-needed -lgcc_s for eh support.  */
  83 #ifdef HAVE_LD_AS_NEEDED
  84 #define USE_LD_AS_NEEDED 1
  85 #endif
  86
  87 #define MD_UNWIND_SUPPORT "config/alpha/linux-unwind.h"
  88
  89 /* Define if long doubles should be mangled as 'g'.  */
  90 #define TARGET_ALTERNATE_LONG_DOUBLE_MANGLING