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, 2006, 2007, 2009,
   4    2010 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 3, 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 COPYING3.  If not see
  21 <http://www.gnu.org/licenses/>.  */
  22
  23 #undef TARGET_DEFAULT
  24 #define TARGET_DEFAULT (MASK_FPREGS | MASK_GAS)
  25
  26 #define TARGET_OS_CPP_BUILTINS()                                \
  27     do {                                                        \
  28         builtin_define ("__gnu_linux__");                       \
  29         builtin_define ("_LONGLONG");                           \
  30         builtin_define_std ("linux");                           \
  31         builtin_define_std ("unix");                            \
  32         builtin_assert ("system=linux");                        \
  33         builtin_assert ("system=unix");                         \
  34         builtin_assert ("system=posix");                        \
  35         /* The GNU C++ standard library requires this.  */      \
  36         if (c_dialect_cxx ())                                   \
  37           builtin_define ("_GNU_SOURCE");                       \
  38     } while (0)
  39
  40 #undef LIB_SPEC
  41 #define LIB_SPEC \
  42   "%{pthread:-lpthread} \
  43    %{shared:-lc} \
  44    %{!shared: %{profile:-lc_p}%{!profile:-lc}}"
  45
  46 #undef CPP_SPEC
  47 #define CPP_SPEC "%{posix:-D_POSIX_SOURCE} %{pthread:-D_REENTRANT}"
  48
  49 /* Show that we need a GP when profiling.  */
  50 #undef TARGET_PROFILING_NEEDS_GP
  51 #define TARGET_PROFILING_NEEDS_GP 1
  52
  53 /* Don't care about faults in the prologue.  */
  54 #undef TARGET_CAN_FAULT_IN_PROLOGUE
  55 #define TARGET_CAN_FAULT_IN_PROLOGUE 1
  56
  57 /* OS fixes up EV5 data fault on prefetch.  */
  58 #undef TARGET_FIXUP_EV5_PREFETCH
  59 #define TARGET_FIXUP_EV5_PREFETCH 1
  60
  61 #undef WCHAR_TYPE
  62 #define WCHAR_TYPE "int"
  63
  64 #ifdef SINGLE_LIBC
  65 #define OPTION_GLIBC  (DEFAULT_LIBC == LIBC_GLIBC)
  66 #else
  67 #define OPTION_GLIBC  (linux_libc == LIBC_GLIBC)
  68 #endif
  69
  70 /* Determine whether the entire c99 runtime is present in the
  71    runtime library.  */
  72 #define TARGET_C99_FUNCTIONS (OPTION_GLIBC)
  73
  74 /* Whether we have sincos that follows the GNU extension.  */
  75 #define TARGET_HAS_SINCOS (OPTION_GLIBC)
  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
  91
  92 /* -mcpu=native handling only makes sense with compiler running on
  93    an Alpha chip.  */
  94 #if defined(__alpha__) || defined(__alpha)
  95 extern const char *host_detect_local_cpu (int argc, const char **argv);
  96 # define EXTRA_SPEC_FUNCTIONS                                           \
  97   { "local_cpu_detect", host_detect_local_cpu },
  98
  99 # define MCPU_MTUNE_NATIVE_SPECS                                        \
 100    " %{mcpu=native:%<mcpu=native %:local_cpu_detect(cpu)}"              \
 101    " %{mtune=native:%<mtune=native %:local_cpu_detect(tune)}"
 102 #else
 103 # define MCPU_MTUNE_NATIVE_SPECS ""
 104 #endif
 105
 106 #define DRIVER_SELF_SPECS MCPU_MTUNE_NATIVE_SPECS