gcc/config/mips/linux.h

   1 /* Definitions for MIPS running Linux-based GNU systems with ELF format.
   2    Copyright (C) 1998, 1999, 2000 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 #undef TARGET_VERSION
  22 #if TARGET_ENDIAN_DEFAULT == 0
  23 #define TARGET_VERSION fprintf (stderr, " (MIPSel GNU/ELF)");
  24 #else
  25 #define TARGET_VERSION fprintf (stderr, " (MIPS GNU/ELF)");
  26 #endif
  27
  28 #undef MD_EXEC_PREFIX
  29 #undef MD_STARTFILE_PREFIX
  30
  31 /* Output at beginning of assembler file.  */
  32 /* The .file command should always begin the output.  */
  33 #undef ASM_FILE_START
  34 #define ASM_FILE_START(FILE)                                            \
  35   do {                                                                  \
  36         mips_asm_file_start (FILE);                                     \
  37         fprintf (FILE, "\t.version\t\"01.01\"\n");                      \
  38   } while (0)
  39
  40
  41 /* Required to keep collect2.c happy */
  42 #undef OBJECT_FORMAT_COFF
  43
  44 /* If we don't set MASK_ABICALLS, we can't default to PIC. */
  45 #undef TARGET_DEFAULT
  46 #define TARGET_DEFAULT (MASK_ABICALLS|MASK_GAS)
  47
  48
  49 /* Handle #pragma weak and #pragma pack.  */
  50 #define HANDLE_SYSV_PRAGMA 1
  51
  52 /* Use more efficient ``thunks'' to implement C++ vtables. */
  53 #undef DEFAULT_VTABLE_THUNKS
  54 #define DEFAULT_VTABLE_THUNKS 1
  55
  56 /* Don't assume anything about the header files.  */
  57 #define NO_IMPLICIT_EXTERN_C
  58
  59 /* Generate calls to memcpy, etc., not bcopy, etc.  */
  60 #define TARGET_MEM_FUNCTIONS
  61
  62 /* Specify predefined symbols in preprocessor.  */
  63 #undef CPP_PREDEFINES
  64 #if TARGET_ENDIAN_DEFAULT == 0
  65 #define CPP_PREDEFINES "-DMIPSEL -D_MIPSEL -Dunix -Dmips -D_mips \
  66 -DR3000 -D_R3000 -Dlinux -Asystem(posix) -Acpu(mips) \
  67 -Amachine(mips) -D__ELF__ -D__PIC__ -D__pic__"
  68 #else
  69 #define CPP_PREDEFINES "-DMIPSEB -D_MIPSEB -Dunix -Dmips -D_mips \
  70 -DR3000 -D_R3000 -Dlinux -Asystem(posix) -Acpu(mips) \
  71 -Amachine(mips) -D__ELF__ -D__PIC__ -D__pic__"
  72 #endif
  73
  74 #undef SUBTARGET_CPP_SIZE_SPEC
  75 #define SUBTARGET_CPP_SIZE_SPEC "\
  76 %{mabi=32: -D__SIZE_TYPE__=unsigned\\ int -D__PTRDIFF_TYPE__=int} \
  77 %{mabi=n32: -D__SIZE_TYPE__=unsigned\\ int -D__PTRDIFF_TYPE__=int} \
  78 %{mabi=64: -D__SIZE_TYPE__=long\\ unsigned\\ int -D__PTRDIFF_TYPE__=long\\ int} \
  79 %{!mabi*: -D__SIZE_TYPE__=unsigned\\ int -D__PTRDIFF_TYPE__=int}"
  80
  81 /* We must make -mips3 do what -mlong64 used to do.  */
  82 /* ??? If no mipsX option given, but a mabi=X option is, then should set
  83    _MIPS_ISA based on the mabi=X option.  */
  84 /* ??? If no mabi=X option give, but a mipsX option is, then should set
  85    _MIPS_SIM based on the mipsX option.  */
  86 /* ??? Same for _MIPS_SZINT.  */
  87 /* ??? Same for _MIPS_SZPTR.  */
  88 /* ??? Same for __SIZE_TYPE and __PTRDIFF_TYPE.  */
  89 #undef SUBTARGET_CPP_SPEC
  90 #define SUBTARGET_CPP_SPEC "\
  91 %{mfp32: -D_MIPS_FPSET=16} \
  92 %{mfp64: -D_MIPS_FPSET=32} \
  93 %{!mfp*: -D_MIPS_FPSET=32} \
  94 %{mips1: -D_MIPS_ISA=_MIPS_ISA_MIPS1} \
  95 %{mips2: -D_MIPS_ISA=_MIPS_ISA_MIPS2} \
  96 %{mips3: -D_MIPS_ISA=_MIPS_ISA_MIPS3} \
  97 %{mips4: -D_MIPS_ISA=_MIPS_ISA_MIPS4} \
  98 %{!mips*: -D_MIPS_ISA=_MIPS_ISA_MIPS3} \
  99 %{mabi=32: -D_MIPS_SIM=_MIPS_SIM_ABI32} \
 100 %{mabi=n32: -D_ABIN32=2 -D_MIPS_SIM=_ABIN32} \
 101 %{mabi=64: -D_ABI64=3 -D_MIPS_SIM=_ABI64} \
 102 %{!mabi*: -D_ABIN32=2 -D_MIPS_SIM=_ABIN32} \
 103 %{!mint64: -D_MIPS_SZINT=32}%{mint64: -D_MIPS_SZINT=64} \
 104 %{mabi=32: -D_MIPS_SZLONG=32} \
 105 %{mabi=n32: -D_MIPS_SZLONG=32} \
 106 %{mabi=64: -D_MIPS_SZLONG=64} \
 107 %{!mabi*: -D_MIPS_SZLONG=32} \
 108 %{mabi=32: -D_MIPS_SZPTR=32} \
 109 %{mabi=n32: -D_MIPS_SZPTR=32} \
 110 %{mabi=64: -D_MIPS_SZPTR=64} \
 111 %{!mabi*: -D_MIPS_SZPTR=32} \
 112 %{!mips*: -U__mips -D__mips} \
 113 %{mabi=32: -U__mips64} \
 114 %{mabi=n32: -D__mips64} \
 115 %{mabi=64: -U__mips64} \
 116 %{!mabi*: -U__mips64} \
 117 %{fno-PIC:-U__PIC__ -U__pic__} %{fno-pic:-U__PIC__ -U__pic__} \
 118 %{fPIC:-D__PIC__ -D__pic__} %{fpic:-D__PIC__ -D__pic__} \
 119 %{pthread:-D_REENTRANT}"
 120
 121 /* Provide a STARTFILE_SPEC appropriate for GNU/Linux.  Here we add
 122    the GNU/Linux magical crtbegin.o file (see crtstuff.c) which
 123    provides part of the support for getting C++ file-scope static
 124    object constructed before entering `main'. */
 125
 126 #undef  STARTFILE_SPEC
 127 #define STARTFILE_SPEC \
 128   "%{!shared: \
 129      %{pg:gcrt1.o%s} %{!pg:%{p:gcrt1.o%s} %{!p:crt1.o%s}}}\
 130    crti.o%s %{!shared:crtbegin.o%s} %{shared:crtbeginS.o%s}"
 131
 132 /* Provide a ENDFILE_SPEC appropriate for GNU/Linux.  Here we tack on
 133    the GNU/Linux magical crtend.o file (see crtstuff.c) which
 134    provides part of the support for getting C++ file-scope static
 135    object constructed before entering `main', followed by a normal
 136    GNU/Linux "finalizer" file, `crtn.o'.  */
 137
 138 #undef  ENDFILE_SPEC
 139 #define ENDFILE_SPEC \
 140   "%{!shared:crtend.o%s} %{shared:crtendS.o%s} crtn.o%s"
 141
 142 /* From iris5.h */
 143 /* -G is incompatible with -KPIC which is the default, so only allow objects
 144    in the small data section if the user explicitly asks for it.  */
 145 #undef MIPS_DEFAULT_GVALUE
 146 #define MIPS_DEFAULT_GVALUE 0
 147
 148 #undef LIB_SPEC
 149 /* Taken from sparc/linux.h.  */
 150 #define LIB_SPEC \
 151   "%{shared: -lc} \
 152    %{!shared: %{mieee-fp:-lieee} %{pthread:-lpthread} \
 153      %{profile:-lc_p} %{!profile: -lc}}"
 154
 155 /* Borrowed from sparc/linux.h */
 156 #undef LINK_SPEC
 157 #define LINK_SPEC "%{shared:-shared} \
 158   %{!shared: \
 159     %{!ibcs: \
 160       %{!static: \
 161         %{rdynamic:-export-dynamic} \
 162         %{!dynamic-linker:-dynamic-linker /lib/ld.so.1}} \
 163         %{static:-static}}}"
 164
 165
 166 #undef SUBTARGET_ASM_SPEC
 167 #define SUBTARGET_ASM_SPEC "\
 168 %{mabi=64: -64} \
 169 %{!fno-PIC:%{!fno-pic:-KPIC}} \
 170 %{fno-PIC:-non_shared} %{fno-pic:-non_shared}"
 171