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1 /* Operating system specific defines to be used when targeting GCC for some
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2 generic System V Release 4 system.
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3 Copyright (C) 1991, 1994, 1995, 1996, 1997, 1998, 1999,
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4 2000, 2001, 2007, 2008, 2009 Free Software Foundation, Inc.
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5 Contributed by Ron Guilmette (rfg@monkeys.com).
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6
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7 This file is part of GCC.
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8
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9 GCC is free software; you can redistribute it and/or modify
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10 it under the terms of the GNU General Public License as published by
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11 the Free Software Foundation; either version 3, or (at your option)
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12 any later version.
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13
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14 GCC is distributed in the hope that it will be useful,
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15 but WITHOUT ANY WARRANTY; without even the implied warranty of
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16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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17 GNU General Public License for more details.
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18
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19 Under Section 7 of GPL version 3, you are granted additional
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20 permissions described in the GCC Runtime Library Exception, version
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21 3.1, as published by the Free Software Foundation.
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22
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23 You should have received a copy of the GNU General Public License and
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24 a copy of the GCC Runtime Library Exception along with this program;
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25 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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26 <http://www.gnu.org/licenses/>. */
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27
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28
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29 /* To use this file, make up a line like that in config.gcc:
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30
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31 tm_file="$tm_file elfos.h svr4.h MACHINE/svr4.h"
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32
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33 where MACHINE is replaced by the name of the basic hardware that you
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34 are targeting for. Then, in the file MACHINE/svr4.h, put any really
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35 system-specific defines (or overrides of defines) which you find that
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36 you need.
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37 */
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38
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39 /* Define a symbol indicating that we are using svr4.h. */
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40 #define USING_SVR4_H
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41
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42 /* Cpp, assembler, linker, library, and startfile spec's. */
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43
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44 /* This defines which switch letters take arguments. On svr4, most of
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45 the normal cases (defined in gcc.c) apply, and we also have -h* and
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46 -z* options (for the linker). Note however that there is no such
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47 thing as a -T option for svr4. */
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48
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49 #undef SWITCH_TAKES_ARG
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50 #define SWITCH_TAKES_ARG(CHAR) \
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51 (DEFAULT_SWITCH_TAKES_ARG (CHAR) \
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52 || (CHAR) == 'h' \
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53 || (CHAR) == 'x' \
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54 || (CHAR) == 'z')
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55
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56 /* This defines which multi-letter switches take arguments. On svr4,
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57 there are no such switches except those implemented by GCC itself. */
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58
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59 #define WORD_SWITCH_TAKES_ARG(STR) \
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60 (DEFAULT_WORD_SWITCH_TAKES_ARG (STR) \
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61 && strcmp (STR, "Tdata") && strcmp (STR, "Ttext") \
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62 && strcmp (STR, "Tbss"))
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63
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64 /* Provide an ASM_SPEC appropriate for svr4.
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65 If we're not using GAS, we try to support as
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66 many of the specialized svr4 assembler options as seems reasonable,
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67 given that there are certain options which we can't (or shouldn't)
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68 support directly due to the fact that they conflict with other options
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69 for other svr4 tools (e.g. ld) or with other options for GCC itself.
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70 For example, we don't support the -o (output file) or -R (remove
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71 input file) options because GCC already handles these things. We
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72 also don't support the -m (run m4) option for the assembler because
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73 that conflicts with the -m (produce load map) option of the svr4
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74 linker. We do however allow passing arbitrary options to the svr4
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75 assembler via the -Wa, option.
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76
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77 Note that gcc doesn't allow a space to follow -Y in a -Ym,* or -Yd,*
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78 option.
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79
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80 The svr4 assembler wants '-' on the command line if it's expected to
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81 read its stdin.
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82 */
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83
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84 #ifdef USE_GAS
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85 #define SVR4_ASM_SPEC \
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86 "%{v:-V} %{Wa,*:%*}"
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87 #else
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88 #define SVR4_ASM_SPEC \
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89 "%{v:-V} %{Qy:} %{!Qn:-Qy} %{n} %{T} %{Ym,*} %{Yd,*} %{Wa,*:%*}"
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90 #endif
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91
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92 #undef ASM_SPEC
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93 #define ASM_SPEC SVR4_ASM_SPEC
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94
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95 #define AS_NEEDS_DASH_FOR_PIPED_INPUT
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96
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97 /* Under svr4, the normal location of the `ld' and `as' programs is the
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98 /usr/ccs/bin directory. */
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99
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100 #ifndef CROSS_DIRECTORY_STRUCTURE
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101 #undef MD_EXEC_PREFIX
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102 #define MD_EXEC_PREFIX "/usr/ccs/bin/"
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103 #endif
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104
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105 /* Under svr4, the normal location of the various *crt*.o files is the
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106 /usr/ccs/lib directory. */
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107
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108 #ifndef CROSS_DIRECTORY_STRUCTURE
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109 #undef MD_STARTFILE_PREFIX
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110 #define MD_STARTFILE_PREFIX "/usr/ccs/lib/"
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111 #endif
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112
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113 /* Provide a LIB_SPEC appropriate for svr4. Here we tack on the default
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114 standard C library (unless we are building a shared library). */
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115
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116 #undef LIB_SPEC
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117 #define LIB_SPEC "%{!shared:%{!symbolic:-lc}}"
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118
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119 /* Provide an ENDFILE_SPEC appropriate for svr4. Here we tack on our own
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120 magical crtend.o file (see crtstuff.c) which provides part of the
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121 support for getting C++ file-scope static object constructed before
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122 entering `main', followed by the normal svr3/svr4 "finalizer" file,
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123 which is either `gcrtn.o' or `crtn.o'. */
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124
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125 #undef ENDFILE_SPEC
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126 #define ENDFILE_SPEC "crtend.o%s %{pg:gcrtn.o%s}%{!pg:crtn.o%s}"
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127
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128 /* Provide a LINK_SPEC appropriate for svr4. Here we provide support
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129 for the special GCC options -static, -shared, and -symbolic which
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130 allow us to link things in one of these three modes by applying the
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131 appropriate combinations of options at link-time. We also provide
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132 support here for as many of the other svr4 linker options as seems
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133 reasonable, given that some of them conflict with options for other
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134 svr4 tools (e.g. the assembler). In particular, we do support the
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135 -z*, -V, -b, -t, -Qy, -Qn, and -YP* options here, and the -e*, -l*,
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136 -o*, -r, -s, -u*, and -L* options are directly supported by gcc.c
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137 itself. We don't directly support the -m (generate load map)
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138 option because that conflicts with the -m (run m4) option of the
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139 svr4 assembler. We also don't directly support the svr4 linker's
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140 -I* or -M* options because these conflict with existing GCC
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141 options. We do however allow passing arbitrary options to the svr4
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142 linker via the -Wl, option, in gcc.c. We don't support the svr4
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143 linker's -a option at all because it is totally useless and because
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144 it conflicts with GCC's own -a option.
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145
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146 Note that gcc doesn't allow a space to follow -Y in a -YP,* option.
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147
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148 When the -G link option is used (-shared and -symbolic) a final link is
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149 not being done. */
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150
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151 #undef LINK_SPEC
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152 #ifdef CROSS_DIRECTORY_STRUCTURE
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153 #define LINK_SPEC "%{h*} %{v:-V} \
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154 %{b} \
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155 %{static:-dn -Bstatic} \
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156 %{shared:-G -dy -z text} \
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157 %{symbolic:-Bsymbolic -G -dy -z text} \
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158 %{G:-G} \
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159 %{YP,*} \
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160 %{Qy:} %{!Qn:-Qy}"
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161 #else
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162 #define LINK_SPEC "%{h*} %{v:-V} \
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163 %{b} \
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164 %{static:-dn -Bstatic} \
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165 %{shared:-G -dy -z text} \
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166 %{symbolic:-Bsymbolic -G -dy -z text} \
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167 %{G:-G} \
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168 %{YP,*} \
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169 %{!YP,*:%{p:-Y P,/usr/ccs/lib/libp:/usr/lib/libp:/usr/ccs/lib:/usr/lib} \
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170 %{!p:-Y P,/usr/ccs/lib:/usr/lib}} \
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171 %{Qy:} %{!Qn:-Qy}"
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172 #endif
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173
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174 /* Gcc automatically adds in one of the files /usr/ccs/lib/values-Xc.o
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175 or /usr/ccs/lib/values-Xa.o for each final link step (depending
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176 upon the other gcc options selected, such as -ansi). These files
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177 each contain one (initialized) copy of a special variable called
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178 `_lib_version'. Each one of these files has `_lib_version' initialized
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179 to a different (enum) value. The SVR4 library routines query the
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180 value of `_lib_version' at run to decide how they should behave.
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181 Specifically, they decide (based upon the value of `_lib_version')
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182 if they will act in a strictly ANSI conforming manner or not. */
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183
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184 #undef STARTFILE_SPEC
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185 #define STARTFILE_SPEC "%{!shared: \
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186 %{!symbolic: \
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187 %{pg:gcrt1.o%s}%{!pg:%{p:mcrt1.o%s}%{!p:crt1.o%s}}}}\
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188 %{pg:gcrti.o%s}%{!pg:crti.o%s} \
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189 %{ansi:values-Xc.o%s} \
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190 %{!ansi:values-Xa.o%s} \
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191 crtbegin.o%s"
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192
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193 /* The numbers used to denote specific machine registers in the System V
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194 Release 4 DWARF debugging information are quite likely to be totally
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195 different from the numbers used in BSD stabs debugging information
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196 for the same kind of target machine. Thus, we undefine the macro
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197 DBX_REGISTER_NUMBER here as an extra inducement to get people to
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198 provide proper machine-specific definitions of DBX_REGISTER_NUMBER
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199 (which is also used to provide DWARF registers numbers in dwarfout.c)
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200 in their tm.h files which include this file. */
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201
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202 #undef DBX_REGISTER_NUMBER
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203
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204 /* Define the actual types of some ANSI-mandated types. (These
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205 definitions should work for most SVR4 systems). */
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206
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207 #undef SIZE_TYPE
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208 #define SIZE_TYPE "unsigned int"
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209
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210 #undef PTRDIFF_TYPE
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211 #define PTRDIFF_TYPE "int"
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212
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213 #undef WCHAR_TYPE
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214 #define WCHAR_TYPE "long int"
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215
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216 #undef WCHAR_TYPE_SIZE
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217 #define WCHAR_TYPE_SIZE BITS_PER_WORD
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218
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219 #define TARGET_POSIX_IO
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