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1 /* Definitions for MIPS running Linux-based GNU systems with ELF format.
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2 Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006,
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3 2007, 2008 Free Software Foundation, Inc.
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4
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5 This file is part of GCC.
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6
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7 GCC is free software; you can redistribute it and/or modify
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8 it under the terms of the GNU General Public License as published by
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9 the Free Software Foundation; either version 3, or (at your option)
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10 any later version.
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11
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12 GCC is distributed in the hope that it will be useful,
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13 but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 GNU General Public License for more details.
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16
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17 You should have received a copy of the GNU General Public License
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18 along with GCC; see the file COPYING3. If not see
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19 <http://www.gnu.org/licenses/>. */
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20
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21 #undef WCHAR_TYPE
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22 #define WCHAR_TYPE "int"
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23
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24 #undef WCHAR_TYPE_SIZE
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25 #define WCHAR_TYPE_SIZE 32
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26
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27 #undef ASM_DECLARE_OBJECT_NAME
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28 #define ASM_DECLARE_OBJECT_NAME mips_declare_object_name
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29
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30 #undef TARGET_VERSION
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31 #if TARGET_ENDIAN_DEFAULT == 0
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32 #define TARGET_VERSION fprintf (stderr, " (MIPSel GNU/Linux with ELF)");
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33 #else
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34 #define TARGET_VERSION fprintf (stderr, " (MIPS GNU/Linux with ELF)");
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35 #endif
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36
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37 #undef MD_EXEC_PREFIX
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38 #undef MD_STARTFILE_PREFIX
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39
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40 /* If we don't set MASK_ABICALLS, we can't default to PIC. */
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41 #undef TARGET_DEFAULT
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42 #define TARGET_DEFAULT MASK_ABICALLS
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43
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44 #define TARGET_OS_CPP_BUILTINS() \
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45 do { \
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46 LINUX_TARGET_OS_CPP_BUILTINS(); \
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47 /* The GNU C++ standard library requires this. */ \
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48 if (c_dialect_cxx ()) \
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49 builtin_define ("_GNU_SOURCE"); \
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50 } while (0)
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51
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52 #undef SUBTARGET_CPP_SPEC
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53 #define SUBTARGET_CPP_SPEC "%{posix:-D_POSIX_SOURCE} %{pthread:-D_REENTRANT}"
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54
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55 /* A standard GNU/Linux mapping. On most targets, it is included in
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56 CC1_SPEC itself by config/linux.h, but mips.h overrides CC1_SPEC
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57 and provides this hook instead. */
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58 #undef SUBTARGET_CC1_SPEC
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59 #define SUBTARGET_CC1_SPEC "%{profile:-p}"
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60
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61 /* From iris5.h */
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62 /* -G is incompatible with -KPIC which is the default, so only allow objects
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63 in the small data section if the user explicitly asks for it. */
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64 #undef MIPS_DEFAULT_GVALUE
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65 #define MIPS_DEFAULT_GVALUE 0
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66
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67 #define GLIBC_DYNAMIC_LINKER "/lib/ld.so.1"
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68
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69 /* Borrowed from sparc/linux.h */
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70 #undef LINK_SPEC
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71 #define LINK_SPEC \
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72 "%(endian_spec) \
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73 %{shared:-shared} \
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74 %{!shared: \
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75 %{!ibcs: \
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76 %{!static: \
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77 %{rdynamic:-export-dynamic} \
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78 %{!dynamic-linker:-dynamic-linker " LINUX_DYNAMIC_LINKER "}} \
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79 %{static:-static}}}"
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80
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81 #undef SUBTARGET_ASM_SPEC
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82 #define SUBTARGET_ASM_SPEC \
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83 "%{!mno-abicalls:%{mplt:-call_nonpic;:-KPIC}}"
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84
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85 /* The MIPS assembler has different syntax for .set. We set it to
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86 .dummy to trap any errors. */
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87 #undef SET_ASM_OP
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88 #define SET_ASM_OP "\t.dummy\t"
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89
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90 #undef ASM_OUTPUT_DEF
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91 #define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2) \
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92 do { \
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93 fputc ( '\t', FILE); \
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94 assemble_name (FILE, LABEL1); \
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95 fputs ( " = ", FILE); \
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96 assemble_name (FILE, LABEL2); \
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97 fputc ( '\n', FILE); \
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98 } while (0)
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99
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100 /* The glibc _mcount stub will save $v0 for us. Don't mess with saving
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101 it, since ASM_OUTPUT_REG_PUSH/ASM_OUTPUT_REG_POP do not work in the
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102 presence of $gp-relative calls. */
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103 #undef ASM_OUTPUT_REG_PUSH
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104 #undef ASM_OUTPUT_REG_POP
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105
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106 #undef LIB_SPEC
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107 #define LIB_SPEC "\
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108 %{pthread:-lpthread} \
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109 %{shared:-lc} \
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110 %{!shared: \
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111 %{profile:-lc_p} %{!profile:-lc}}"
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112
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113 #define MD_UNWIND_SUPPORT "config/mips/linux-unwind.h"
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114
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115 #ifdef HAVE_AS_NO_SHARED
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116 /* Default to -mno-shared for non-PIC. */
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117 # define NO_SHARED_SPECS \
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118 "%{mshared|mno-shared|fpic|fPIC|fpie|fPIE:;:-mno-shared}"
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119 #else
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120 # define NO_SHARED_SPECS ""
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121 #endif
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122
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123 /* -march=native handling only makes sense with compiler running on
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124 a MIPS chip. */
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125 #if defined(__mips__)
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126 extern const char *host_detect_local_cpu (int argc, const char **argv);
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127 # define EXTRA_SPEC_FUNCTIONS \
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128 { "local_cpu_detect", host_detect_local_cpu },
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129
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130 # define MARCH_MTUNE_NATIVE_SPECS \
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131 " %{march=native:%<march=native %:local_cpu_detect(arch)}" \
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132 " %{mtune=native:%<mtune=native %:local_cpu_detect(tune)}"
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133 #else
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134 # define MARCH_MTUNE_NATIVE_SPECS ""
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135 #endif
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136
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137 #define LINUX_DRIVER_SELF_SPECS \
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138 NO_SHARED_SPECS \
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139 MARCH_MTUNE_NATIVE_SPECS, \
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140 /* -mplt has no effect without -mno-shared. Simplify later \
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141 specs handling by removing a redundant option. */ \
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142 "%{!mno-shared:%<mplt}", \
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143 /* -mplt likewise has no effect for -mabi=64 without -msym32. */ \
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144 "%{mabi=64:%{!msym32:%<mplt}}"
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145
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146 #undef DRIVER_SELF_SPECS
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147 #define DRIVER_SELF_SPECS \
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148 BASE_DRIVER_SELF_SPECS, \
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149 LINUX_DRIVER_SELF_SPECS
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