gcc/config/mips/openbsd.h

   1 /* Configuration for  a Mips ABI32 OpenBSD target.
   2    Copyright (C) 1999, 2003, 2004 Free Software Foundation, Inc.
   3
   4 This file is part of GCC.
   5
   6 GCC is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2, or (at your option)
   9 any later version.
  10
  11 GCC is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GCC; see the file COPYING.  If not, write to
  18 the Free Software Foundation, 59 Temple Place - Suite 330,
  19 Boston, MA 02111-1307, USA.  */
  20
  21 /* Definitions needed for OpenBSD, to avoid picking mips 'defaults'.  */
  22
  23 /* GAS must know this.  */
  24 #undef SUBTARGET_ASM_SPEC
  25 #define SUBTARGET_ASM_SPEC "%{fPIC|fPIE:-KPIC}"
  26
  27 #define AS_NEEDS_DASH_FOR_PIPED_INPUT
  28
  29 /* CPP specific OpenBSD specs.  */
  30 #undef SUBTARGET_CPP_SPEC
  31 #define SUBTARGET_CPP_SPEC OBSD_CPP_SPEC
  32
  33 /* Needed for ELF (inspired by netbsd-elf).  */
  34 #undef LOCAL_LABEL_PREFIX
  35 #define LOCAL_LABEL_PREFIX      "."
  36
  37 /* The profiling lib spec here is not really correct but we leave
  38    it as it is until we have some kind of profiling working.  */
  39 #define LIB_SPEC OBSD_LIB_SPEC
  40
  41 /* mips assembler uses .set for arcane purposes.  __attribute__((alias))
  42    and friends won't work until we get recent binutils with .weakext
  43         support.  */
  44 #undef SET_ASM_OP
  45
  46 #define TARGET_OS_CPP_BUILTINS()                        \
  47     do {                                                \
  48         builtin_define ("__unix__");                    \
  49         builtin_define ("__SYSTYPE_BSD__");             \
  50         builtin_define ("__NO_LEADING_UNDERSCORES__");  \
  51         builtin_define ("__GP_SUPPORT__");              \
  52         builtin_define ("__OpenBSD__");                 \
  53         builtin_assert ("system=unix");                 \
  54         builtin_assert ("system=OpenBSD");              \
  55         builtin_assert ("machine=mips");                        \
  56 } while (0)
  57
  58 /* Layout of source language data types.  */
  59
  60 /* This must agree with <machine/ansi.h>.  */
  61 #undef SIZE_TYPE
  62 #define SIZE_TYPE "unsigned int"
  63
  64 #undef PTRDIFF_TYPE
  65 #define PTRDIFF_TYPE "int"
  66
  67 #undef WCHAR_TYPE
  68 #define WCHAR_TYPE "int"
  69
  70 #undef WCHAR_TYPE_SIZE
  71 #define WCHAR_TYPE_SIZE 32
  72
  73 /* Controlling the compilation driver.  */
  74
  75 /* LINK_SPEC appropriate for OpenBSD:  support for GCC options
  76    -static, -assert, and -nostdlib. Dynamic loader control.  */
  77 #undef LINK_SPEC
  78 #define LINK_SPEC \
  79   "%{G*} %{EB} %{EL} %{mips1} %{mips2} %{mips3} \
  80    %{bestGnum} %{shared} %{non_shared} \
  81    %{call_shared} %{no_archive} %{exact_version} \
  82    %{!shared: %{!non_shared: %{!call_shared: -non_shared}}} \
  83    %{!dynamic-linker:-dynamic-linker /usr/libexec/ld.so} \
  84    %{!nostdlib:%{!r*:%{!e*:-e __start}}} -dc -dp \
  85    %{static:-Bstatic} %{!static:-Bdynamic} %{assert*}"
  86
  87 /* -G is incompatible with -KPIC which is the default, so only allow objects
  88    in the small data section if the user explicitly asks for it.  */
  89 #undef MIPS_DEFAULT_GVALUE
  90 #define MIPS_DEFAULT_GVALUE 0
  91
  92
  93 /* Since gas and gld are standard on OpenBSD, we don't need these.  */
  94 #undef ASM_FINAL_SPEC
  95 #undef STARTFILE_SPEC
  96
  97 /* Switch into a generic section.  */
  98 #undef TARGET_ASM_NAMED_SECTION
  99 #define TARGET_ASM_NAMED_SECTION  default_elf_asm_named_section