gcc/config/mips/iris.h

   1 /* Definitions of target machine for GNU compiler.  Generic IRIX version.
   2    Copyright (C) 1993, 1995, 1996, 1998, 2000,
   3    2001, 2002, 2003, 2004 Free Software Foundation, Inc.
   4
   5 This file is part of GCC.
   6
   7 GCC 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 GCC 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 GCC; see the file COPYING.  If not, write to
  19 the Free Software Foundation, 51 Franklin Street, Fifth Floor,
  20 Boston, MA 02110-1301, USA.  */
  21
  22 /* We are compiling for IRIX now.  */
  23 #undef TARGET_IRIX
  24 #define TARGET_IRIX 1
  25
  26 /* The size in bytes of a DWARF field indicating an offset or length
  27    relative to a debug info section, specified to be 4 bytes in the DWARF-2
  28    specification.  The SGI/MIPS ABI defines it to be the same as PTR_SIZE.  */
  29 #define DWARF_OFFSET_SIZE PTR_SIZE
  30
  31 /* The size in bytes of the initial length field in a debug info
  32    section.  The DWARF 3 (draft) specification defines this to be
  33    either 4 or 12 (with a 4-byte "escape" word when it's 12), but the
  34    SGI/MIPS ABI predates this standard and defines it to be the same
  35    as DWARF_OFFSET_SIZE.  */
  36 #define DWARF_INITIAL_LENGTH_SIZE DWARF_OFFSET_SIZE
  37
  38 /* MIPS assemblers don't have the usual .set foo,bar construct;
  39    .set is used for assembler options instead.  */
  40 #undef SET_ASM_OP
  41 #define ASM_OUTPUT_DEF(FILE, LABEL1, LABEL2)                    \
  42   do                                                            \
  43     {                                                           \
  44       fputc ('\t', FILE);                                       \
  45       assemble_name (FILE, LABEL1);                             \
  46       fputs (" = ", FILE);                                      \
  47       assemble_name (FILE, LABEL2);                             \
  48       fputc ('\n', FILE);                                       \
  49     }                                                           \
  50   while (0)
  51
  52 /* The MIPSpro o32 linker warns about not linking .comment sections.  */
  53 #undef IDENT_ASM_OP
  54
  55 #undef LOCAL_LABEL_PREFIX
  56 #define LOCAL_LABEL_PREFIX (TARGET_NEWABI ? "." : "$")
  57
  58 #undef ASM_DECLARE_OBJECT_NAME
  59 #define ASM_DECLARE_OBJECT_NAME mips_declare_object_name
  60
  61 #undef ASM_FINISH_DECLARE_OBJECT
  62 #define ASM_FINISH_DECLARE_OBJECT mips_finish_declare_object
  63
  64 /* Also do this for libcalls.  */
  65 #undef TARGET_ASM_EXTERNAL_LIBCALL
  66 #define TARGET_ASM_EXTERNAL_LIBCALL irix_output_external_libcall
  67
  68 /* The linker needs a space after "-o".  */
  69 #define SWITCHES_NEED_SPACES "o"
  70
  71 /* Specify wchar_t types.  */
  72 #undef WCHAR_TYPE
  73 #define WCHAR_TYPE (Pmode == DImode ? "int" : "long int")
  74
  75 #undef WCHAR_TYPE_SIZE
  76 #define WCHAR_TYPE_SIZE INT_TYPE_SIZE
  77
  78 /* Same for wint_t.  */
  79 #undef WINT_TYPE
  80 #define WINT_TYPE (Pmode == DImode ? "int" : "long int")
  81
  82 #undef WINT_TYPE_SIZE
  83 #define WINT_TYPE_SIZE 32
  84
  85 /* Plain char is unsigned in the SGI compiler.  */
  86 #undef DEFAULT_SIGNED_CHAR
  87 #define DEFAULT_SIGNED_CHAR 0
  88
  89 #define WORD_SWITCH_TAKES_ARG(STR)                      \
  90   (DEFAULT_WORD_SWITCH_TAKES_ARG (STR)                  \
  91    || strcmp (STR, "rpath") == 0)
  92
  93 #define TARGET_OS_CPP_BUILTINS()                                \
  94   do                                                            \
  95     {                                                           \
  96       builtin_define_std ("host_mips");                         \
  97       builtin_define_std ("sgi");                               \
  98       builtin_define_std ("unix");                              \
  99       builtin_define_std ("SYSTYPE_SVR4");                      \
 100       builtin_define ("_MODERN_C");                             \
 101       builtin_define ("_SVR4_SOURCE");                          \
 102       builtin_define ("__DSO__");                               \
 103       builtin_assert ("system=unix");                           \
 104       builtin_assert ("system=svr4");                           \
 105       builtin_assert ("machine=sgi");                           \
 106                                                                 \
 107       if (mips_abi == ABI_32)                                   \
 108         {                                                       \
 109           builtin_define ("_ABIO32=1");                         \
 110           builtin_define ("_MIPS_SIM=_ABIO32");                 \
 111           builtin_define ("_MIPS_SZINT=32");                    \
 112           builtin_define ("_MIPS_SZLONG=32");                   \
 113           builtin_define ("_MIPS_SZPTR=32");                    \
 114         }                                                       \
 115       else if (mips_abi == ABI_64)                              \
 116         {                                                       \
 117           builtin_define ("_ABI64=3");                          \
 118           builtin_define ("_MIPS_SIM=_ABI64");                  \
 119           builtin_define ("_MIPS_SZINT=32");                    \
 120           builtin_define ("_MIPS_SZLONG=64");                   \
 121           builtin_define ("_MIPS_SZPTR=64");                    \
 122         }                                                       \
 123       else                                                      \
 124         {                                                       \
 125           builtin_define ("_ABIN32=2");                         \
 126           builtin_define ("_MIPS_SIM=_ABIN32");                 \
 127           builtin_define ("_MIPS_SZINT=32");                    \
 128           builtin_define ("_MIPS_SZLONG=32");                   \
 129           builtin_define ("_MIPS_SZPTR=32");                    \
 130         }                                                       \
 131                                                                 \
 132       if (!ISA_MIPS1 && !ISA_MIPS2)                             \
 133         builtin_define ("_COMPILER_VERSION=601");               \
 134                                                                 \
 135       if (!TARGET_FLOAT64)                                      \
 136         builtin_define ("_MIPS_FPSET=16");                      \
 137       else                                                      \
 138         builtin_define ("_MIPS_FPSET=32");                      \
 139                                                                 \
 140       /* We must always define _LONGLONG, even when -ansi is    \
 141          used, because IRIX 5 system header files require it.   \
 142          This is OK, because gcc never warns when long long     \
 143          is used in system header files.                        \
 144                                                                 \
 145          An alternative would be to support the SGI builtin     \
 146          type __long_long.  */                                  \
 147       builtin_define ("_LONGLONG");                             \
 148                                                                 \
 149       /* IRIX 6.5.18 and above provide many ISO C99             \
 150          features protected by the __c99 macro.                 \
 151          libstdc++ v3 needs them as well.  */                   \
 152       if (TARGET_IRIX6)                                         \
 153         if (flag_isoc99 || c_dialect_cxx ())                    \
 154           builtin_define ("__c99");                             \
 155                                                                 \
 156       /* The GNU C++ standard library requires that             \
 157          __EXTENSIONS__ and _SGI_SOURCE be defined on at        \
 158          least IRIX 6.2 and probably all IRIX 6 prior to 6.5.   \
 159          We don't need this on IRIX 6.5 itself, but it          \
 160          shouldn't hurt other than the namespace pollution.  */ \
 161       if (!flag_iso || (TARGET_IRIX6 && c_dialect_cxx ()))      \
 162         {                                                       \
 163           builtin_define ("__EXTENSIONS__");                    \
 164           builtin_define ("_SGI_SOURCE");                       \
 165         }                                                       \
 166     }                                                           \
 167   while (0)
 168
 169 #undef SUBTARGET_CC1_SPEC
 170 #define SUBTARGET_CC1_SPEC "%{static: -mno-abicalls}"
 171
 172 #undef INIT_SECTION_ASM_OP
 173 #define INIT_SECTION_ASM_OP "\t.section\t.gcc_init,\"ax\",@progbits"
 174
 175 #undef FINI_SECTION_ASM_OP
 176 #define FINI_SECTION_ASM_OP "\t.section\t.gcc_fini,\"ax\",@progbits"
 177
 178 #ifdef IRIX_USING_GNU_LD
 179 #define IRIX_NO_UNRESOLVED ""
 180 #else
 181 #define IRIX_NO_UNRESOLVED "-no_unresolved"
 182 #endif
 183
 184 /* Generic part of the LINK_SPEC.  */
 185 #undef LINK_SPEC
 186 #define LINK_SPEC "\
 187 %{G*} %{EB} %{EL} %{mips1} %{mips2} %{mips3} %{mips4} \
 188 %{bestGnum} %{shared} %{non_shared} \
 189 %{call_shared} %{no_archive} %{exact_version} \
 190 %{!shared: \
 191   %{!non_shared: %{!call_shared:%{!r: -call_shared " IRIX_NO_UNRESOLVED "}}}} \
 192 %{rpath} -init __gcc_init -fini __gcc_fini " IRIX_SUBTARGET_LINK_SPEC
 193
 194 /* A linker error can empirically be avoided by removing duplicate
 195    library search directories.  */
 196 #define LINK_ELIMINATE_DUPLICATE_LDIRECTORIES 1
 197
 198 /* Add -g to mips.h default to avoid confusing gas with local symbols
 199    generated from stabs info.  */
 200 #undef NM_FLAGS
 201 #define NM_FLAGS "-Bng"
 202
 203 /* The system header files are C++ aware.  */
 204 /* ??? Unfortunately, most but not all of the headers are C++ aware.
 205    Specifically, curses.h is not, and as a consequence, defining this
 206    used to prevent libg++ building.  This is no longer the case so
 207    define it again to prevent other problems, e.g. with getopt in
 208    unistd.h.  We still need some way to fix just those files that need
 209    fixing.  */
 210 #define NO_IMPLICIT_EXTERN_C 1
 211
 212 /* -G is incompatible with -KPIC which is the default, so only allow objects
 213    in the small data section if the user explicitly asks for it.  */
 214 #undef MIPS_DEFAULT_GVALUE
 215 #define MIPS_DEFAULT_GVALUE 0
 216
 217 /* The native o32 IRIX linker does not support merging without a
 218    special elspec(5) file.  */
 219 #ifndef IRIX_USING_GNU_LD
 220 #undef HAVE_GAS_SHF_MERGE
 221 #define HAVE_GAS_SHF_MERGE 0
 222 #endif