gcc/config/mips/gnu-user.h

   1 /* Definitions for MIPS systems using GNU userspace.
   2    Copyright (C) 1998-2017 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 #undef GNU_USER_TARGET_LINK_SPEC
  56 #define GNU_USER_TARGET_LINK_SPEC "\
  57   %{G*} %{EB} %{EL} %{mips*} %{shared} \
  58   %{!shared: \
  59     %{!static: \
  60       %{rdynamic:-export-dynamic} \
  61       %{mabi=n32: -dynamic-linker " GNU_USER_DYNAMIC_LINKERN32 "} \
  62       %{mabi=64: -dynamic-linker " GNU_USER_DYNAMIC_LINKER64 "} \
  63       %{mabi=32: -dynamic-linker " GNU_USER_DYNAMIC_LINKER32 "}} \
  64     %{static}} \
  65   %{mabi=n32:-m" GNU_USER_LINK_EMULATIONN32 "} \
  66   %{mabi=64:-m" GNU_USER_LINK_EMULATION64 "} \
  67   %{mabi=32:-m" GNU_USER_LINK_EMULATION32 "}"
  68
  69 #undef LINK_SPEC
  70 #define LINK_SPEC GNU_USER_TARGET_LINK_SPEC
  71
  72 #undef SUBTARGET_ASM_SPEC
  73 #define SUBTARGET_ASM_SPEC \
  74   "%{!mno-abicalls:%{mplt:-call_nonpic;:-KPIC}}"
  75
  76 /* The MIPS assembler has different syntax for .set. We set it to
  77    .dummy to trap any errors.  */
  78 #undef SET_ASM_OP
  79 #define SET_ASM_OP "\t.dummy\t"
  80
  81 #undef ASM_OUTPUT_DEF
  82 #define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2)                              \
  83  do {                                                                   \
  84         fputc ( '\t', FILE);                                            \
  85         assemble_name (FILE, LABEL1);                                   \
  86         fputs ( " = ", FILE);                                           \
  87         assemble_name (FILE, LABEL2);                                   \
  88         fputc ( '\n', FILE);                                            \
  89  } while (0)
  90
  91 /* The glibc _mcount stub will save $v0 for us.  Don't mess with saving
  92    it, since ASM_OUTPUT_REG_PUSH/ASM_OUTPUT_REG_POP do not work in the
  93    presence of $gp-relative calls.  */
  94 #undef ASM_OUTPUT_REG_PUSH
  95 #undef ASM_OUTPUT_REG_POP
  96
  97 #undef LIB_SPEC
  98 #define LIB_SPEC GNU_USER_TARGET_LIB_SPEC
  99
 100 #ifdef HAVE_AS_NO_SHARED
 101 /* Default to -mno-shared for non-PIC.  */
 102 # define NO_SHARED_SPECS \
 103   " %{mshared|mno-shared:;:%{" NO_FPIE_AND_FPIC_SPEC ":-mno-shared}}"
 104 #else
 105 # define NO_SHARED_SPECS ""
 106 #endif
 107
 108 /* -march=native handling only makes sense with compiler running on
 109    a MIPS chip.  */
 110 #if defined(__mips__)
 111 extern const char *host_detect_local_cpu (int argc, const char **argv);
 112 # define EXTRA_SPEC_FUNCTIONS \
 113   { "local_cpu_detect", host_detect_local_cpu },
 114
 115 # define MARCH_MTUNE_NATIVE_SPECS                               \
 116   " %{march=native:%<march=native %:local_cpu_detect(arch)}"    \
 117   " %{mtune=native:%<mtune=native %:local_cpu_detect(tune)}"
 118 #else
 119 # define MARCH_MTUNE_NATIVE_SPECS ""
 120 #endif
 121
 122 #define LINUX_DRIVER_SELF_SPECS \
 123   NO_SHARED_SPECS                                                       \
 124   MARCH_MTUNE_NATIVE_SPECS,                                             \
 125   /* -mplt has no effect without -mno-shared.  Simplify later           \
 126      specs handling by removing a redundant option.  */                 \
 127   "%{!mno-shared:%<mplt}",                                              \
 128   /* -mplt likewise has no effect for -mabi=64 without -msym32.  */     \
 129   "%{mabi=64:%{!msym32:%<mplt}}",                                       \
 130   "%{!EB:%{!EL:%(endian_spec)}}",                                       \
 131   "%{!mabi=*: -" MULTILIB_ABI_DEFAULT "}"
 132
 133 #undef DRIVER_SELF_SPECS
 134 #define DRIVER_SELF_SPECS \
 135   MIPS_ISA_LEVEL_SPEC,    \
 136   BASE_DRIVER_SELF_SPECS, \
 137   LINUX_DRIVER_SELF_SPECS
 138
 139 /* Similar to standard Linux, but adding -ffast-math support.  */
 140 #undef  GNU_USER_TARGET_MATHFILE_SPEC
 141 #define GNU_USER_TARGET_MATHFILE_SPEC \
 142   "%{Ofast|ffast-math|funsafe-math-optimizations:crtfastmath.o%s}"
 143 #undef  ENDFILE_SPEC
 144 #define ENDFILE_SPEC \
 145   GNU_USER_TARGET_MATHFILE_SPEC " " \
 146   GNU_USER_TARGET_ENDFILE_SPEC
 147
 148 #undef LOCAL_LABEL_PREFIX
 149 #define LOCAL_LABEL_PREFIX (TARGET_OLDABI ? "$" : ".")