gcc/config/alpha/netbsd.h

   1 /* Definitions of target machine for GNU compiler,
   2    for Alpha NetBSD systems.
   3    Copyright (C) 1998, 2002 Free Software Foundation, Inc.
   4
   5 This file is part of GNU CC.
   6
   7 GNU CC 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 2, or (at your option)
  10 any later version.
  11
  12 GNU CC 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 GNU CC; see the file COPYING.  If not, write to
  19 the Free Software Foundation, 59 Temple Place - Suite 330,
  20 Boston, MA 02111-1307, USA.  */
  21
  22 #undef TARGET_DEFAULT
  23 #define TARGET_DEFAULT (MASK_FP | MASK_FPREGS | MASK_GAS)
  24
  25 #define TARGET_OS_CPP_BUILTINS()                \
  26     do {                                        \
  27         NETBSD_OS_CPP_BUILTINS_ELF();           \
  28         NETBSD_OS_CPP_BUILTINS_LP64();          \
  29     } while (0)
  30
  31
  32 /* NetBSD doesn't use the LANGUAGE* built-ins.  */
  33 #undef SUBTARGET_LANGUAGE_CPP_BUILTINS
  34 #define SUBTARGET_LANGUAGE_CPP_BUILTINS()       /* nothing */
  35
  36
  37 /* Show that we need a GP when profiling.  */
  38 #undef TARGET_PROFILING_NEEDS_GP
  39 #define TARGET_PROFILING_NEEDS_GP 1
  40
  41
  42 /* Provide a CPP_SUBTARGET_SPEC appropriate for NetBSD/alpha.  We use
  43    this to pull in CPP specs that all NetBSD configurations need.  */
  44
  45 #undef CPP_SUBTARGET_SPEC
  46 #define CPP_SUBTARGET_SPEC NETBSD_CPP_SPEC
  47
  48 #undef SUBTARGET_EXTRA_SPECS
  49 #define SUBTARGET_EXTRA_SPECS                   \
  50   { "netbsd_link_spec", NETBSD_LINK_SPEC_ELF }, \
  51   { "netbsd_entry_point", NETBSD_ENTRY_POINT }, \
  52   { "netbsd_endfile_spec", NETBSD_ENDFILE_SPEC },
  53
  54
  55 /* Provide a LINK_SPEC appropriate for a NetBSD/alpha ELF target.  */
  56
  57 #undef LINK_SPEC
  58 #define LINK_SPEC \
  59   "%{G*} %{relax:-relax} \
  60    %{O*:-O3} %{!O*:-O1} \
  61    %(netbsd_link_spec)"
  62
  63 #define NETBSD_ENTRY_POINT "__start"
  64
  65
  66 /* Provide an ENDFILE_SPEC appropriate for NetBSD/alpha ELF.  Here we
  67    add crtend.o, which provides part of the support for getting
  68    C++ file-scope static objects deconstructed after exiting "main".
  69
  70    We also need to handle the GCC option `-ffast-math'.  */
  71
  72 #undef ENDFILE_SPEC
  73 #define ENDFILE_SPEC            \
  74   "%{ffast-math|funsafe-math-optimizations:crtfm%O%s} \
  75    %(netbsd_endfile_spec)"
  76
  77
  78 /* Attempt to enable execute permissions on the stack.  */
  79
  80 #define TRANSFER_FROM_TRAMPOLINE NETBSD_ENABLE_EXECUTE_STACK
  81
  82
  83 #undef TARGET_VERSION
  84 #define TARGET_VERSION fprintf (stderr, " (NetBSD/alpha ELF)");