gcc/config/mips/gnu-user.h

   1 /* Definitions for MIPS systems using GNU userspace.
   2    Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006,
   3    2007, 2008, 2010, 2011, 2012 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 /* If we don't set MASK_ABICALLS, we can't default to PIC.  */
  31 #undef TARGET_DEFAULT
  32 #define TARGET_DEFAULT MASK_ABICALLS
  33
  34 #define TARGET_OS_CPP_BUILTINS()                                \
  35   do {                                                          \
  36     GNU_USER_TARGET_OS_CPP_BUILTINS();                          \
  37     /* The GNU C++ standard library requires this.  */          \
  38     if (c_dialect_cxx ())                                       \
  39       builtin_define ("_GNU_SOURCE");                           \
  40   } while (0)
  41
  42 #undef SUBTARGET_CPP_SPEC
  43 #define SUBTARGET_CPP_SPEC "%{posix:-D_POSIX_SOURCE} %{pthread:-D_REENTRANT}"
  44
  45 /* A standard GNU/Linux mapping.  On most targets, it is included in
  46    CC1_SPEC itself by config/linux.h, but mips.h overrides CC1_SPEC
  47    and provides this hook instead.  */
  48 #undef SUBTARGET_CC1_SPEC
  49 #define SUBTARGET_CC1_SPEC GNU_USER_TARGET_CC1_SPEC
  50
  51 /* -G is incompatible with -KPIC which is the default, so only allow objects
  52    in the small data section if the user explicitly asks for it.  */
  53 #undef MIPS_DEFAULT_GVALUE
  54 #define MIPS_DEFAULT_GVALUE 0
  55
  56 /* Borrowed from sparc/linux.h */
  57 #undef GNU_USER_TARGET_LINK_SPEC
  58 #define GNU_USER_TARGET_LINK_SPEC \
  59  "%(endian_spec) \
  60   %{shared:-shared} \
  61   %{!shared: \
  62     %{!static: \
  63       %{rdynamic:-export-dynamic} \
  64       -dynamic-linker " GNU_USER_DYNAMIC_LINKER "} \
  65       %{static:-static}}"
  66 #undef LINK_SPEC
  67 #define LINK_SPEC GNU_USER_TARGET_LINK_SPEC
  68
  69 #undef SUBTARGET_ASM_SPEC
  70 #define SUBTARGET_ASM_SPEC \
  71   "%{!mno-abicalls:%{mplt:-call_nonpic;:-KPIC}}"
  72
  73 /* The MIPS assembler has different syntax for .set. We set it to
  74    .dummy to trap any errors.  */
  75 #undef SET_ASM_OP
  76 #define SET_ASM_OP "\t.dummy\t"
  77
  78 #undef ASM_OUTPUT_DEF
  79 #define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2)                              \
  80  do {                                                                   \
  81         fputc ( '\t', FILE);                                            \
  82         assemble_name (FILE, LABEL1);                                   \
  83         fputs ( " = ", FILE);                                           \
  84         assemble_name (FILE, LABEL2);                                   \
  85         fputc ( '\n', FILE);                                            \
  86  } while (0)
  87
  88 /* The glibc _mcount stub will save $v0 for us.  Don't mess with saving
  89    it, since ASM_OUTPUT_REG_PUSH/ASM_OUTPUT_REG_POP do not work in the
  90    presence of $gp-relative calls.  */
  91 #undef ASM_OUTPUT_REG_PUSH
  92 #undef ASM_OUTPUT_REG_POP
  93
  94 #undef LIB_SPEC
  95 #define LIB_SPEC GNU_USER_TARGET_LIB_SPEC
  96
  97 #ifdef HAVE_AS_NO_SHARED
  98 /* Default to -mno-shared for non-PIC.  */
  99 # define NO_SHARED_SPECS \
 100   " %{mshared|mno-shared|fpic|fPIC|fpie|fPIE:;:-mno-shared}"
 101 #else
 102 # define NO_SHARED_SPECS ""
 103 #endif
 104
 105 /* -march=native handling only makes sense with compiler running on
 106    a MIPS chip.  */
 107 #if defined(__mips__)
 108 extern const char *host_detect_local_cpu (int argc, const char **argv);
 109 # define EXTRA_SPEC_FUNCTIONS \
 110   { "local_cpu_detect", host_detect_local_cpu },
 111
 112 # define MARCH_MTUNE_NATIVE_SPECS                               \
 113   " %{march=native:%<march=native %:local_cpu_detect(arch)}"    \
 114   " %{mtune=native:%<mtune=native %:local_cpu_detect(tune)}"
 115 #else
 116 # define MARCH_MTUNE_NATIVE_SPECS ""
 117 #endif
 118
 119 #define LINUX_DRIVER_SELF_SPECS \
 120   NO_SHARED_SPECS                                                       \
 121   MARCH_MTUNE_NATIVE_SPECS,                                             \
 122   /* -mplt has no effect without -mno-shared.  Simplify later           \
 123      specs handling by removing a redundant option.  */                 \
 124   "%{!mno-shared:%<mplt}",                                              \
 125   /* -mplt likewise has no effect for -mabi=64 without -msym32.  */     \
 126   "%{mabi=64:%{!msym32:%<mplt}}"
 127
 128 #undef DRIVER_SELF_SPECS
 129 #define DRIVER_SELF_SPECS \
 130   BASE_DRIVER_SELF_SPECS, \
 131   LINUX_DRIVER_SELF_SPECS
 132
 133 /* Similar to standard Linux, but adding -ffast-math support.  */
 134 #undef  GNU_USER_TARGET_MATHFILE_SPEC
 135 #define GNU_USER_TARGET_MATHFILE_SPEC \
 136   "%{Ofast|ffast-math|funsafe-math-optimizations:crtfastmath.o%s}"
 137 #undef  ENDFILE_SPEC
 138 #define ENDFILE_SPEC \
 139   GNU_USER_TARGET_MATHFILE_SPEC " " \
 140   GNU_USER_TARGET_ENDFILE_SPEC