gcc/config/mips/iris5.h

   1 /* Definitions of target machine for GNU compiler.  Iris version 5.
   2    Copyright (C) 1993, 1995, 1996, 1998 Free Software Foundation, Inc.
   3
   4 This file is part of GNU CC.
   5
   6 GNU CC 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 GNU CC 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 GNU CC; 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 #ifndef TARGET_DEFAULT
  22 #define TARGET_DEFAULT  MASK_ABICALLS
  23 #endif
  24 #define ABICALLS_ASM_OP ".option pic2"
  25
  26 #include "mips/iris3.h"
  27 #include "mips/mips.h"
  28 #include "mips/iris4.h"
  29
  30 /* Irix 5 doesn't use COFF, so disable special COFF handling in collect2.c.  */
  31 #undef OBJECT_FORMAT_COFF
  32
  33 /* ??? This is correct, but not very useful, because there is no file that
  34    uses this macro.  */
  35 /* ??? The best way to handle global constructors under ELF is to use .init
  36    and .fini sections.  Unfortunately, there is apparently no way to get
  37    the Irix 5.x (x <= 2) assembler to create these sections.  So we instead
  38    use collect.  The linker can create these sections via -init and -fini
  39    options, but using this would require modifying how crtstuff works, and
  40    I will leave that for another time (or someone else).  */
  41 #define OBJECT_FORMAT_ELF
  42 #define HAS_INIT_SECTION
  43 #define LD_INIT_SWITCH "-init"
  44 #define LD_FINI_SWITCH "-fini"
  45
  46 /* Specify wchar_t types.  */
  47 #undef  WCHAR_TYPE
  48 #undef  WCHAR_TYPE_SIZE
  49 #undef  MAX_WCHAR_TYPE_SIZE
  50
  51 #define WCHAR_TYPE      "long int"
  52 #define WCHAR_TYPE_SIZE LONG_TYPE_SIZE
  53 #define MAX_WCHAR_TYPE_SIZE     MAX_LONG_TYPE_SIZE
  54
  55 #define WORD_SWITCH_TAKES_ARG(STR)                      \
  56  (DEFAULT_WORD_SWITCH_TAKES_ARG (STR)                   \
  57   || !strcmp (STR, "rpath"))
  58
  59 #undef SUBTARGET_CC1_SPEC
  60 #define SUBTARGET_CC1_SPEC "%{static: -mno-abicalls}"
  61
  62 /* ??? _MIPS_SIM and _MIPS_SZPTR should eventually depend on options when
  63    options for them exist.  */
  64
  65 #undef CPP_PREDEFINES
  66 #define CPP_PREDEFINES \
  67  "-Dunix -Dmips -Dsgi -Dhost_mips -DMIPSEB -D_MIPSEB -DSYSTYPE_SVR4 \
  68   -D_SVR4_SOURCE -D_MODERN_C -D__DSO__ \
  69   -D_MIPS_SIM=_MIPS_SIM_ABI32 -D_MIPS_SZPTR=32 \
  70   -Asystem(unix) -Asystem(svr4) -Acpu(mips) -Amachine(sgi)"
  71
  72 #undef SUBTARGET_CPP_SPEC
  73 #define SUBTARGET_CPP_SPEC "\
  74 %{!ansi:-D__EXTENSIONS__ -D_SGI_SOURCE -D_LONGLONG} \
  75 %{!mfp64: -D_MIPS_FPSET=16}%{mfp64: -D_MIPS_FPSET=32} \
  76 %{mips1: -D_MIPS_ISA=_MIPS_ISA_MIPS1} \
  77 %{mips2: -D_MIPS_ISA=_MIPS_ISA_MIPS2} \
  78 %{mips3: -D_MIPS_ISA=_MIPS_ISA_MIPS3} \
  79 %{!mips1: %{!mips2: %{!mips3: -D_MIPS_ISA=_MIPS_ISA_MIPS1}}} \
  80 %{!mint64: -D_MIPS_SZINT=32}%{mint64: -D_MIPS_SZINT=64} \
  81 %{!mlong64: -D_MIPS_SZLONG=32}%{mlong64: -D_MIPS_SZLONG=64}"
  82
  83 #undef LINK_SPEC
  84 #define LINK_SPEC "\
  85 %{G*} %{EB} %{EL} %{mips1} %{mips2} %{mips3} \
  86 %{bestGnum} %{shared} %{non_shared} \
  87 %{call_shared} %{no_archive} %{exact_version} \
  88 %{static: -non_shared} \
  89 %{!static: \
  90   %{!shared:%{!non_shared:%{!call_shared: -call_shared -no_unresolved}}}} \
  91 %{rpath} \
  92 -_SYSTYPE_SVR4"
  93
  94 /* We now support shared libraries.  */
  95 #undef STARTFILE_SPEC
  96 #define STARTFILE_SPEC "\
  97 %{!static: \
  98   %{!shared:%{pg:gcrt1.o%s}%{!pg:%{p:mcrt1.o%s libprof1.a%s}%{!p:crt1.o%s}}}} \
  99 %{static: \
 100   %{pg:gcrt1.o%s} \
 101   %{!pg:%{p:/usr/lib/nonshared/mcrt1.o%s libprof1.a%s} \
 102   %{!p:/usr/lib/nonshared/crt1.o%s}}}"
 103
 104 #undef LIB_SPEC
 105 #define LIB_SPEC "%{!shared:%{p:-lprof1} %{pg:-lprof1} -lc}"
 106
 107 #undef ENDFILE_SPEC
 108 #define ENDFILE_SPEC "%{!shared:crtn.o%s}"
 109
 110 /* We do not want to run mips-tfile!  */
 111 #undef ASM_FINAL_SPEC
 112
 113 /* The system header files are C++ aware. */
 114 /* ??? Unfortunately, most but not all of the headers are C++ aware.
 115    Specifically, curses.h is not, and as a consequence, defining this
 116    used to prevent libg++ building.  This is no longer the case so
 117    define it again to prevent other problems, e.g. with getopt in
 118    unistd.h.  We still need some way to fix just those files that need
 119    fixing.  */
 120 #define NO_IMPLICIT_EXTERN_C 1
 121
 122 /* We don't support debugging info for now. */
 123 #undef DBX_DEBUGGING_INFO
 124 #undef SDB_DEBUGGING_INFO
 125 #undef MIPS_DEBUGGING_INFO
 126
 127 /* Likewise, the assembler doesn't handle DWARF2 directives.  */
 128 #define DWARF2_UNWIND_INFO 0
 129
 130 #undef MACHINE_TYPE
 131 #define MACHINE_TYPE "SGI running IRIX 5.x"
 132
 133  /* Dollar signs are OK in Irix5 but not in Irix3.  */
 134 #undef DOLLARS_IN_IDENTIFIERS
 135 #undef NO_DOLLAR_IN_LABEL
 136
 137 /* -G is incompatible with -KPIC which is the default, so only allow objects
 138    in the small data section if the user explicitly asks for it.  */
 139 #undef MIPS_DEFAULT_GVALUE
 140 #define MIPS_DEFAULT_GVALUE 0
 141
 142 /* In Irix 5, we must output a `.global name .text' directive for every used
 143    but undefined function.  If we don't, the linker may perform an optimization
 144    (skipping over the insns that set $gp) when it is unsafe.  This is used
 145    indirectly by ASM_OUTPUT_EXTERNAL.  */
 146 #define ASM_OUTPUT_UNDEF_FUNCTION(FILE, NAME)   \
 147 do {                                            \
 148   fputs ("\t.globl ", FILE);                    \
 149   assemble_name (FILE, NAME);                   \
 150   fputs (" .text\n", FILE);                     \
 151 } while (0)
 152
 153 /* Also do this for libcalls.  */
 154 #define ASM_OUTPUT_EXTERNAL_LIBCALL(FILE, FUN)  \
 155   mips_output_external_libcall (FILE, XSTR (FUN, 0))
 156
 157 /* This does for functions what ASM_DECLARE_OBJECT_NAME does for variables.
 158    This is used indirectly by ASM_OUTPUT_EXTERNAL.  */
 159 #define ASM_DECLARE_FUNCTION_SIZE(STREAM, NAME, DECL)   \
 160 do {                                                    \
 161   tree name_tree = get_identifier (NAME);               \
 162   TREE_ASM_WRITTEN (name_tree) = 1;                     \
 163 } while (0)