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1 /* Definitions of target machine for GNU compiler. IRIX version 6.
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2 Copyright (C) 1994, 1995, 1996, 1997, 1998, 2000, 2001, 2002, 2003, 2004,
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3 2005, 2006, 2007, 2008
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4 Free Software Foundation, Inc.
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5
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6 This file is part of GCC.
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7
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8 GCC is free software; you can redistribute it and/or modify
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9 it under the terms of the GNU General Public License as published by
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10 the Free Software Foundation; either version 3, or (at your option)
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11 any later version.
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12
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13 GCC is distributed in the hope that it will be useful,
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14 but WITHOUT ANY WARRANTY; without even the implied warranty of
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15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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16 GNU General Public License for more details.
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17
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18 You should have received a copy of the GNU General Public License
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19 along with GCC; see the file COPYING3. If not see
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20 <http://www.gnu.org/licenses/>. */
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21
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22 /* Allow some special handling for IRIX 6. */
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23 #undef TARGET_IRIX6
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24 #define TARGET_IRIX6 1
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25
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26 /* Default to -mabi=n32 and -mips3. */
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27 #undef MULTILIB_DEFAULTS
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28 #define MULTILIB_DEFAULTS { "mabi=n32" }
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29
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30 /* Force the default ABI onto the command line in order to make the specs
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31 easier to write. Default to the mips2 ISA for the O32 ABI. */
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32 #undef DRIVER_SELF_SPECS
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33 #define DRIVER_SELF_SPECS \
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34 "%{!mabi=*: -mabi=n32}", \
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35 "%{mabi=32: %{!mips*: %{!march*: -mips2}}}", \
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36 /* Configuration-independent MIPS rules. */ \
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37 BASE_DRIVER_SELF_SPECS
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38
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39 /* Force the generation of dwarf .debug_frame sections even if not
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40 compiling -g. This guarantees that we can unwind the stack. */
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41 #define DWARF2_FRAME_INFO 1
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42
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43 /* The system unwinder in libexc requires a specific dwarf return address
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44 column to work. */
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45 #undef DWARF_FRAME_RETURN_COLUMN
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46 #define DWARF_FRAME_RETURN_COLUMN (FP_REG_LAST + 1)
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47
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48 #undef MACHINE_TYPE
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49 #define MACHINE_TYPE "SGI running IRIX 6.x"
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50
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51 #ifdef IRIX_USING_GNU_LD
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52 #define IRIX_SUBTARGET_LINK_SPEC \
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53 "%{mabi=32: -melf32bsmip}%{mabi=n32: -melf32bmipn32}%{mabi=64: -melf64bmip}"
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54 #else
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55 /* Explicitly hide crt symbols that would normally be marked with
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56 a "hidden" visibility attribute.
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57
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58 We have traditionally disabled this attribute when using the
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59 native linker because the native linker's visibility support is
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60 not fully-compatible with the GNU linker's. In particular, the
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61 native linker does not pull in archive objects purely to resolve
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62 references to the object's hidden symbols, whereas the GNU
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63 linker does.
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64
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65 The gcc build system currently hides symbols in some static
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66 libraries (typically libgcov.a or libgcc.a) whenever visibility
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67 attributes are supported. On targets with GNU semantics, this
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68 makes sure that uses of libx.so symbols in one dynamic object are
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69 not resolved to libx.a symbols in another dynamic object. But
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70 on targets with IRIX semantics, hiding the symbols prevents the
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71 static archive from working at all.
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72
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73 It would probably be better to enable visiblity attributes for
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74 IRIX ld and disable the static archives versioning. It shouldn't
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75 make anything worse, since libx.a symbols are global by default
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76 anyway. However, no-one has volunteered to do this yet. */
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77
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78 #define IRIX_SUBTARGET_LINK_SPEC \
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79 "%{w} -_SYSTYPE_SVR4 -woff 131 \
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80 %{shared:-hidden_symbol __dso_handle} \
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81 %{mabi=32: -32}%{mabi=n32: -n32}%{mabi=64: -64}%{!mabi*: -n32}"
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82 #endif
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83
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84 /* Profiling is supported via libprof1.a not -lc_p as in IRIX 3. */
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85 #undef STARTFILE_SPEC
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86 #define STARTFILE_SPEC \
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87 "%{!shared: \
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88 %{mabi=32:%{pg:gcrt1.o%s} \
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89 %{!pg:%{p:mcrt1.o%s libprof1.a%s}%{!p:crt1.o%s}}} \
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90 %{mabi=n32: \
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91 %{mips4:%{pg:/usr/lib32/mips4/gcrt1.o%s} \
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92 %{!pg:%{p:/usr/lib32/mips4/mcrt1.o%s /usr/lib32/mips4/libprof1.a%s} \
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93 %{!p:/usr/lib32/mips4/crt1.o%s}}} \
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94 %{!mips4:%{pg:/usr/lib32/mips3/gcrt1.o%s} \
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95 %{!pg:%{p:/usr/lib32/mips3/mcrt1.o%s /usr/lib32/mips3/libprof1.a%s} \
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96 %{!p:/usr/lib32/mips3/crt1.o%s}}}} \
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97 %{mabi=64: \
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98 %{mips4:%{pg:/usr/lib64/mips4/gcrt1.o} \
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99 %{!pg:%{p:/usr/lib64/mips4/mcrt1.o /usr/lib64/mips4/libprof1.a} \
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100 %{!p:/usr/lib64/mips4/crt1.o}}} \
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101 %{!mips4:%{pg:/usr/lib64/mips3/gcrt1.o} \
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102 %{!pg:%{p:/usr/lib64/mips3/mcrt1.o /usr/lib64/mips3/libprof1.a} \
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103 %{!p:/usr/lib64/mips3/crt1.o}}}}} \
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104 irix-crti.o%s crtbegin.o%s"
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105
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106 #ifdef IRIX_USING_GNU_LD
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107 #define SUBTARGET_DONT_WARN_UNUSED_SPEC ""
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108 #define SUBTARGET_WARN_UNUSED_SPEC ""
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109 #else
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110 #define SUBTARGET_DONT_WARN_UNUSED_SPEC "-dont_warn_unused"
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111 #define SUBTARGET_WARN_UNUSED_SPEC "-warn_unused"
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112 #endif
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113
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114 #undef LIB_SPEC
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115 #define LIB_SPEC \
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116 "%{mabi=n32: %{mips4:-L/usr/lib32/mips4} %{!mips4:-L/usr/lib32/mips3} \
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117 -L/usr/lib32} \
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118 %{mabi=64: %{mips4:-L/usr/lib64/mips4} %{!mips4:-L/usr/lib64/mips3} \
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119 -L/usr/lib64} \
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120 %{!shared:" \
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121 SUBTARGET_DONT_WARN_UNUSED_SPEC \
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122 " %{pthread:-lpthread} %{p:libprof1.a%s}%{pg:libprof1.a%s} -lc " \
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123 SUBTARGET_WARN_UNUSED_SPEC "}"
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124
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125 /* Avoid getting two warnings for libgcc.a everytime we link. libgcc.a
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126 contains references to copysignl, so link with libm to resolve them. */
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127 #undef LIBGCC_SPEC
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128 #define LIBGCC_SPEC \
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129 SUBTARGET_DONT_WARN_UNUSED_SPEC " -lgcc -lm " SUBTARGET_WARN_UNUSED_SPEC
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130
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131 #undef ENDFILE_SPEC
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132 #define ENDFILE_SPEC \
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133 "crtend.o%s irix-crtn.o%s \
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134 %{!shared: \
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135 %{mabi=32:crtn.o%s}\
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136 %{mabi=n32:%{mips4:/usr/lib32/mips4/crtn.o%s}\
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137 %{!mips4:/usr/lib32/mips3/crtn.o%s}}\
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138 %{mabi=64:%{mips4:/usr/lib64/mips4/crtn.o%s}\
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139 %{!mips4:/usr/lib64/mips3/crtn.o%s}}}"
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140
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141 #define MIPS_TFMODE_FORMAT mips_extended_format
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142
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143 #undef SUBTARGET_CPP_SPEC
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144 #define SUBTARGET_CPP_SPEC "%{pthread:-D_REENTRANT}"
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145
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