gcc/config/mips/gnu-user.h

   1 /* Definitions for MIPS systems using GNU userspace.
   2    Copyright (C) 1998-2014 Free Software Foundation, Inc.
   3
   4 This file is part of GCC.
   5
   6 GCC 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 3, or (at your option)
   9 any later version.
  10
  11 GCC 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 GCC; see the file COPYING3.  If not see
  18 <http://www.gnu.org/licenses/>.  */
  19
  20 #undef WCHAR_TYPE
  21 #define WCHAR_TYPE "int"
  22
  23 #undef WCHAR_TYPE_SIZE
  24 #define WCHAR_TYPE_SIZE 32
  25
  26 #undef ASM_DECLARE_OBJECT_NAME
  27 #define ASM_DECLARE_OBJECT_NAME mips_declare_object_name
  28
  29 /* If we don't set MASK_ABICALLS, we can't default to PIC.  */
  30 #undef TARGET_DEFAULT
  31 #define TARGET_DEFAULT MASK_ABICALLS
  32
  33 #define TARGET_OS_CPP_BUILTINS()                                \
  34   do {                                                          \
  35     GNU_USER_TARGET_OS_CPP_BUILTINS();                          \
  36     /* The GNU C++ standard library requires this.  */          \
  37     if (c_dialect_cxx ())                                       \
  38       builtin_define ("_GNU_SOURCE");                           \
  39   } while (0)
  40
  41 #undef SUBTARGET_CPP_SPEC
  42 #define SUBTARGET_CPP_SPEC "%{posix:-D_POSIX_SOURCE} %{pthread:-D_REENTRANT}"
  43
  44 /* A standard GNU/Linux mapping.  On most targets, it is included in
  45    CC1_SPEC itself by config/linux.h, but mips.h overrides CC1_SPEC
  46    and provides this hook instead.  */
  47 #undef SUBTARGET_CC1_SPEC
  48 #define SUBTARGET_CC1_SPEC GNU_USER_TARGET_CC1_SPEC
  49
  50 /* -G is incompatible with -KPIC which is the default, so only allow objects
  51    in the small data section if the user explicitly asks for it.  */
  52 #undef MIPS_DEFAULT_GVALUE
  53 #define MIPS_DEFAULT_GVALUE 0
  54
  55 /* Borrowed from sparc/linux.h */
  56 #undef GNU_USER_TARGET_LINK_SPEC
  57 #define GNU_USER_TARGET_LINK_SPEC \
  58  "%(endian_spec) \
  59   %{shared:-shared} \
  60   %{!shared: \
  61     %{!static: \
  62       %{rdynamic:-export-dynamic} \
  63       -dynamic-linker " GNU_USER_DYNAMIC_LINKER "} \
  64       %{static:-static}}"
  65 #undef LINK_SPEC
  66 #define LINK_SPEC GNU_USER_TARGET_LINK_SPEC
  67
  68 #undef SUBTARGET_ASM_SPEC
  69 #define SUBTARGET_ASM_SPEC \
  70   "%{!mno-abicalls:%{mplt:-call_nonpic;:-KPIC}}"
  71
  72 /* The MIPS assembler has different syntax for .set. We set it to
  73    .dummy to trap any errors.  */
  74 #undef SET_ASM_OP
  75 #define SET_ASM_OP "\t.dummy\t"
  76
  77 #undef ASM_OUTPUT_DEF
  78 #define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2)                              \
  79  do {                                                                   \
  80         fputc ( '\t', FILE);                                            \
  81         assemble_name (FILE, LABEL1);                                   \
  82         fputs ( " = ", FILE);                                           \
  83         assemble_name (FILE, LABEL2);                                   \
  84         fputc ( '\n', FILE);                                            \
  85  } while (0)
  86
  87 /* The glibc _mcount stub will save $v0 for us.  Don't mess with saving
  88    it, since ASM_OUTPUT_REG_PUSH/ASM_OUTPUT_REG_POP do not work in the
  89    presence of $gp-relative calls.  */
  90 #undef ASM_OUTPUT_REG_PUSH
  91 #undef ASM_OUTPUT_REG_POP
  92
  93 #undef LIB_SPEC
  94 #define LIB_SPEC GNU_USER_TARGET_LIB_SPEC
  95
  96 #ifdef HAVE_AS_NO_SHARED
  97 /* Default to -mno-shared for non-PIC.  */
  98 # define NO_SHARED_SPECS \
  99   " %{mshared|mno-shared|fpic|fPIC|fpie|fPIE:;:-mno-shared}"
 100 #else
 101 # define NO_SHARED_SPECS ""
 102 #endif
 103
 104 /* -march=native handling only makes sense with compiler running on
 105    a MIPS chip.  */
 106 #if defined(__mips__)
 107 extern const char *host_detect_local_cpu (int argc, const char **argv);
 108 # define EXTRA_SPEC_FUNCTIONS \
 109   { "local_cpu_detect", host_detect_local_cpu },
 110
 111 # define MARCH_MTUNE_NATIVE_SPECS                               \
 112   " %{march=native:%<march=native %:local_cpu_detect(arch)}"    \
 113   " %{mtune=native:%<mtune=native %:local_cpu_detect(tune)}"
 114 #else
 115 # define MARCH_MTUNE_NATIVE_SPECS ""
 116 #endif
 117
 118 #define LINUX_DRIVER_SELF_SPECS \
 119   NO_SHARED_SPECS                                                       \
 120   MARCH_MTUNE_NATIVE_SPECS,                                             \
 121   /* -mplt has no effect without -mno-shared.  Simplify later           \
 122      specs handling by removing a redundant option.  */                 \
 123   "%{!mno-shared:%<mplt}",                                              \
 124   /* -mplt likewise has no effect for -mabi=64 without -msym32.  */     \
 125   "%{mabi=64:%{!msym32:%<mplt}}"
 126
 127 #undef DRIVER_SELF_SPECS
 128 #define DRIVER_SELF_SPECS \
 129   BASE_DRIVER_SELF_SPECS, \
 130   LINUX_DRIVER_SELF_SPECS
 131
 132 /* Similar to standard Linux, but adding -ffast-math support.  */
 133 #undef  GNU_USER_TARGET_MATHFILE_SPEC
 134 #define GNU_USER_TARGET_MATHFILE_SPEC \
 135   "%{Ofast|ffast-math|funsafe-math-optimizations:crtfastmath.o%s}"
 136 #undef  ENDFILE_SPEC
 137 #define ENDFILE_SPEC \
 138   GNU_USER_TARGET_MATHFILE_SPEC " " \
 139   GNU_USER_TARGET_ENDFILE_SPEC