gcc/config/mips/linux.h

   1 /* Definitions for MIPS running Linux-based GNU systems with ELF format.
   2    Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006,
   3    2007 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 3, 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 COPYING3.  If not see
  19 <http://www.gnu.org/licenses/>.  */
  20
  21 #undef WCHAR_TYPE
  22 #define WCHAR_TYPE "int"
  23
  24 #undef WCHAR_TYPE_SIZE
  25 #define WCHAR_TYPE_SIZE 32
  26
  27 #undef ASM_DECLARE_OBJECT_NAME
  28 #define ASM_DECLARE_OBJECT_NAME mips_declare_object_name
  29
  30 #undef TARGET_VERSION
  31 #if TARGET_ENDIAN_DEFAULT == 0
  32 #define TARGET_VERSION fprintf (stderr, " (MIPSel GNU/Linux with ELF)");
  33 #else
  34 #define TARGET_VERSION fprintf (stderr, " (MIPS GNU/Linux with ELF)");
  35 #endif
  36
  37 #undef MD_EXEC_PREFIX
  38 #undef MD_STARTFILE_PREFIX
  39
  40 /* If we don't set MASK_ABICALLS, we can't default to PIC.  */
  41 #undef TARGET_DEFAULT
  42 #define TARGET_DEFAULT MASK_ABICALLS
  43
  44 #define TARGET_OS_CPP_BUILTINS()                                \
  45   do {                                                          \
  46     LINUX_TARGET_OS_CPP_BUILTINS();                             \
  47     /* The GNU C++ standard library requires this.  */          \
  48     if (c_dialect_cxx ())                                       \
  49       builtin_define ("_GNU_SOURCE");                           \
  50   } while (0)
  51
  52 #undef SUBTARGET_CPP_SPEC
  53 #define SUBTARGET_CPP_SPEC "%{posix:-D_POSIX_SOURCE} %{pthread:-D_REENTRANT}"
  54
  55 /* A standard GNU/Linux mapping.  On most targets, it is included in
  56    CC1_SPEC itself by config/linux.h, but mips.h overrides CC1_SPEC
  57    and provides this hook instead.  */
  58 #undef SUBTARGET_CC1_SPEC
  59 #define SUBTARGET_CC1_SPEC "%{profile:-p}"
  60
  61 /* From iris5.h */
  62 /* -G is incompatible with -KPIC which is the default, so only allow objects
  63    in the small data section if the user explicitly asks for it.  */
  64 #undef MIPS_DEFAULT_GVALUE
  65 #define MIPS_DEFAULT_GVALUE 0
  66
  67 #define GLIBC_DYNAMIC_LINKER "/lib/ld.so.1"
  68
  69 /* Borrowed from sparc/linux.h */
  70 #undef LINK_SPEC
  71 #define LINK_SPEC \
  72  "%(endian_spec) \
  73   %{shared:-shared} \
  74   %{!shared: \
  75     %{!ibcs: \
  76       %{!static: \
  77         %{rdynamic:-export-dynamic} \
  78         %{!dynamic-linker:-dynamic-linker " LINUX_DYNAMIC_LINKER "}} \
  79         %{static:-static}}}"
  80
  81 #undef SUBTARGET_ASM_SPEC
  82 #define SUBTARGET_ASM_SPEC \
  83   "%{!mno-abicalls:%{mplt:-call_nonpic;:-KPIC}}"
  84
  85 /* The MIPS assembler has different syntax for .set. We set it to
  86    .dummy to trap any errors.  */
  87 #undef SET_ASM_OP
  88 #define SET_ASM_OP "\t.dummy\t"
  89
  90 #undef ASM_OUTPUT_DEF
  91 #define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2)                              \
  92  do {                                                                   \
  93         fputc ( '\t', FILE);                                            \
  94         assemble_name (FILE, LABEL1);                                   \
  95         fputs ( " = ", FILE);                                           \
  96         assemble_name (FILE, LABEL2);                                   \
  97         fputc ( '\n', FILE);                                            \
  98  } while (0)
  99
 100 /* The glibc _mcount stub will save $v0 for us.  Don't mess with saving
 101    it, since ASM_OUTPUT_REG_PUSH/ASM_OUTPUT_REG_POP do not work in the
 102    presence of $gp-relative calls.  */
 103 #undef ASM_OUTPUT_REG_PUSH
 104 #undef ASM_OUTPUT_REG_POP
 105
 106 #undef LIB_SPEC
 107 #define LIB_SPEC "\
 108 %{pthread:-lpthread} \
 109 %{shared:-lc} \
 110 %{!shared: \
 111   %{profile:-lc_p} %{!profile:-lc}}"
 112
 113 #define MD_UNWIND_SUPPORT "config/mips/linux-unwind.h"
 114
 115 #ifdef HAVE_AS_NO_SHARED
 116 /* Default to -mno-shared for non-PIC.  */
 117 # define NO_SHARED_SPECS \
 118   "%{mshared|mno-shared|fpic|fPIC|fpie|fPIE:;:-mno-shared}"
 119 #else
 120 # define NO_SHARED_SPECS ""
 121 #endif
 122
 123 /* -march=native handling only makes sense with compiler running on
 124    a MIPS chip.  */
 125 #if defined(__mips__)
 126 extern const char *host_detect_local_cpu (int argc, const char **argv);
 127 # define EXTRA_SPEC_FUNCTIONS \
 128   { "local_cpu_detect", host_detect_local_cpu },
 129
 130 # define MARCH_MTUNE_NATIVE_SPECS                               \
 131   " %{march=native:%<march=native %:local_cpu_detect(arch)}"    \
 132   " %{mtune=native:%<mtune=native %:local_cpu_detect(tune)}"
 133 #else
 134 # define MARCH_MTUNE_NATIVE_SPECS ""
 135 #endif
 136
 137 #define BASE_DRIVER_SELF_SPECS \
 138   NO_SHARED_SPECS                                                       \
 139   MARCH_MTUNE_NATIVE_SPECS,                                             \
 140   /* -mplt has no effect without -mno-shared.  Simplify later           \
 141      specs handling by removing a redundant option.  */                 \
 142   "%{!mno-shared:%<mplt}",                                              \
 143   /* -mplt likewise has no effect for -mabi=64 without -msym32.  */     \
 144   "%{mabi=64:%{!msym32:%<mplt}}"
 145 #define DRIVER_SELF_SPECS BASE_DRIVER_SELF_SPECS