gcc/config/netbsd-elf.h

   1 /* Common configuration file for NetBSD ELF targets.
   2    Copyright (C) 2002 Free Software Foundation, Inc.
   3    Contributed by Wasabi Systems, 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 /* TARGET_OS_CPP_BUILTINS() common to all NetBSD ELF targets.  */
  23 #define NETBSD_OS_CPP_BUILTINS_ELF()            \
  24   do                                            \
  25     {                                           \
  26       NETBSD_OS_CPP_BUILTINS_COMMON();          \
  27       builtin_define ("__ELF__");               \
  28     }                                           \
  29   while (0)
  30
  31 /* This defines which switch letters take arguments.  On NetBSD, most
  32    of the normal cases (defined by gcc.c) apply, and we also have -h*
  33    and -z* options (for the linker) (coming from SVR4).  */
  34
  35 #undef SWITCH_TAKES_ARG
  36 #define SWITCH_TAKES_ARG(CHAR)                  \
  37   (DEFAULT_SWITCH_TAKES_ARG (CHAR)              \
  38    || (CHAR) == 'h'                             \
  39    || (CHAR) == 'z'                             \
  40    || (CHAR) == 'R')
  41
  42
  43 /* Provide a STARTFILE_SPEC appropriate for NetBSD ELF.  Here we
  44    provide support for the special GCC option -static.  On ELF
  45    targets, we also add the crtbegin.o file, which provides part
  46    of the support for getting C++ file-scope static objects
  47    constructed before entering "main".  */
  48
  49 #define NETBSD_STARTFILE_SPEC   \
  50   "%{!shared:                   \
  51      %{pg:gcrt0%O%s}            \
  52      %{!pg:                     \
  53        %{p:gcrt0%O%s}           \
  54        %{!p:crt0%O%s}}}         \
  55    %:if-exists(crti%O%s)        \
  56    %{static:%:if-exists-else(crtbeginT%O%s crtbegin%O%s)} \
  57    %{!static: \
  58      %{!shared:crtbegin%O%s} %{shared:crtbeginS%O%s}}"
  59
  60 #undef STARTFILE_SPEC
  61 #define STARTFILE_SPEC NETBSD_STARTFILE_SPEC
  62
  63
  64 /* Provide an ENDFILE_SPEC appropriate for NetBSD ELF.  Here we
  65    add crtend.o, which provides part of the support for getting
  66    C++ file-scope static objects deconstructed after exiting "main".  */
  67
  68 #define NETBSD_ENDFILE_SPEC     \
  69   "%{!shared:crtend%O%s} %{shared:crtendS%O%s} \
  70    %:if-exists(crtn%O%s)"
  71
  72 #undef ENDFILE_SPEC
  73 #define ENDFILE_SPEC NETBSD_ENDFILE_SPEC
  74
  75 /* Provide a LINK_SPEC appropriate for NetBSD ELF.  Here we provide
  76    support for the special GCC options -assert, -R, -rpath, -shared,
  77    -nostdlib, -static, -rdynamic, and -dynamic-linker.
  78
  79    Target-specific code can use this in conjunction with any other
  80    target-specific LINK_SPEC options.
  81
  82    Target-specific code must provide the %(netbsd_entry_point) spec.  */
  83
  84 #define NETBSD_LINK_SPEC_ELF \
  85   "%{assert*} %{R*} %{rpath*} \
  86    %{shared:-shared} \
  87    %{!shared: \
  88      -dc -dp \
  89      %{!nostdlib: \
  90        %{!r*: \
  91          %{!e*:-e %(netbsd_entry_point)}}} \
  92      %{!static: \
  93        %{rdynamic:-export-dynamic} \
  94        %{!dynamic-linker:-dynamic-linker /usr/libexec/ld.elf_so}} \
  95      %{static:-static}}"