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1 #!/bin/sh
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2 # Generates multilib.h.
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3 # Copyright (C) 1994, 1995, 1996, 1997, 1999, 2002, 2007
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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 it under
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9 #the terms of the GNU General Public License as published by the Free
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10 #Software Foundation; either version 3, or (at your option) any later
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11 #version.
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12
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13 #GCC is distributed in the hope that it will be useful, but WITHOUT
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14 #ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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15 #FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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16 #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 # This shell script produces a header file which the gcc driver
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23 # program uses to pick which library to use based on the machine
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24 # specific options that it is given.
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25
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26 # The first argument is a list of sets of options. The elements in
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27 # the list are separated by spaces. Within an element, the options
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28 # are separated by slashes or pipes. No leading dash is used on the
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29 # options.
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30 # Each option in a set separated by slashes is mutually incompatible
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31 # with all other options
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32 # in the set.
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33 # Each option in a set separated by pipes will be used for the library
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34 # compilation and any of the options in the set will be sufficient
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35 # for it to be triggered.
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36
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37 # The optional second argument is a list of subdirectory names. If
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38 # the second argument is non-empty, there must be as many elements in
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39 # the second argument as there are options in the first argument. The
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40 # elements in the second list are separated by spaces. If the second
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41 # argument is empty, the option names will be used as the directory
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42 # names.
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43
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44 # The optional third argument is a list of options which are
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45 # identical. The elements in the list are separated by spaces. Each
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46 # element must be of the form OPTION=OPTION. The first OPTION should
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47 # appear in the first argument, and the second should be a synonym for
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48 # it. Question marks are replaced with equal signs in both options.
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49
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50 # The optional fourth argument is a list of multilib directory
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51 # combinations that should not be built.
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52
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53 # The optional fifth argument is a list of options that should be
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54 # used whenever building multilib libraries.
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55
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56 # The optional sixth argument is a list of exclusions used internally by
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57 # the compiler similar to exceptions. The difference being that exclusions
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58 # allow matching default options that genmultilib does not know about and
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59 # is done at runtime as opposed to being sorted out at compile time.
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60 # Each element in the list is a separate exclusion rule. Each rule is
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61 # a list of options (sans preceding '-') separated by a '/'. The options
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62 # on the rule are grouped as an AND operation, and all options much match
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63 # for the rule to exclude a set. Options can be preceded with a '!' to
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64 # match a logical NOT.
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65
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66 # The optional seventh argument is a list of OS subdirectory names.
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67 # The format is either the same as of the second argument, or a set of
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68 # mappings. When it is the same as the second argument, it describes
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69 # the multilib directories using OS conventions, rather than GCC
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70 # conventions. When it is a set of mappings of the form gccdir=osdir,
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71 # the left side gives the GCC convention and the right gives the
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72 # equivalent OS defined location. If the osdir part begins with a !,
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73 # the os directory names are used exclusively. Use the mapping when
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74 # there is no one-to-one equivalence between GCC levels and the OS.
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75
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76 # The last option should be "yes" if multilibs are enabled. If it is not
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77 # "yes", all GCC multilib dir names will be ".".
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78
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79 # The output looks like
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80 # #define MULTILIB_MATCHES "\
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81 # SUBDIRECTORY OPTIONS;\
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82 # ...
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83 # "
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84 # The SUBDIRECTORY is the subdirectory to use. The OPTIONS are
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85 # multiple options separated by spaces. Each option may start with an
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86 # exclamation point. gcc will consider each line in turn. If none of
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87 # the options beginning with an exclamation point are present, and all
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88 # of the other options are present, that subdirectory will be used.
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89 # The order of the subdirectories is such that they can be created in
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90 # order; that is, a subdirectory is preceded by all its parents.
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91
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92 # Here is an example (this is from the actual sparc64 case):
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93 # genmultilib 'm64/m32 mno-app-regs|mcmodel=medany' '64 32 alt'
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94 # 'mcmodel?medany=mcmodel?medmid' 'm32/mno-app-regs* m32/mcmodel=*'
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95 # '' 'm32/!m64/mno-app-regs m32/!m64/mcmodel=medany'
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96 # '../lib64 ../lib32 alt' yes
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97 # This produces:
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98 # ". !m64 !m32 !mno-app-regs !mcmodel=medany;",
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99 # "64:../lib64 m64 !m32 !mno-app-regs !mcmodel=medany;",
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100 # "32:../lib32 !m64 m32 !mno-app-regs !mcmodel=medany;",
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101 # "alt !m64 !m32 mno-app-regs mcmodel=medany;",
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102 # "alt !m64 !m32 mno-app-regs !mcmodel=medany;",
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103 # "alt !m64 !m32 !mno-app-regs mcmodel=medany;",
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104 # "64/alt:../lib64/alt m64 !m32 mno-app-regs mcmodel=medany;",
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105 # "64/alt:../lib64/alt m64 !m32 mno-app-regs !mcmodel=medany;",
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106 # "64/alt:../lib64/alt m64 !m32 !mno-app-regs mcmodel=medany;",
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107 #
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108 # The effect is that `gcc -mno-app-regs' (for example) will append "alt"
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109 # to the directory name when searching for libraries or startup files and
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110 # `gcc -m32 -mcmodel=medany' (for example) will append "32/alt". Also note
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111 # that exclusion above is moot, unless the compiler had a default of -m32,
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112 # which would mean that all of the "alt" directories (not the 64/alt ones)
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113 # would be ignored (not generated, nor used) since the exclusion also
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114 # matches the multilib_default args.
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115
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116 # Copy the positional parameters into variables.
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117 options=$1
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118 dirnames=$2
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119 matches=$3
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120 exceptions=$4
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121 extra=$5
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122 exclusions=$6
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123 osdirnames=$7
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124 enable_multilib=$8
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125
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126 echo "static const char *const multilib_raw[] = {"
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127
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128 mkdir tmpmultilib.$$ || exit 1
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129 # Use cd ./foo to avoid CDPATH output.
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130 cd ./tmpmultilib.$$ || exit 1
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131
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132 # What we want to do is select all combinations of the sets in
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133 # options. Each combination which includes a set of mutually
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134 # exclusive options must then be output multiple times, once for each
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135 # item in the set. Selecting combinations is a recursive process.
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136 # Since not all versions of sh support functions, we achieve recursion
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137 # by creating a temporary shell script which invokes itself.
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138 rm -f tmpmultilib
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139 cat >tmpmultilib <<\EOF
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140 #!/bin/sh
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141 # This recursive script basically outputs all combinations of its
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142 # input arguments, handling mutually exclusive sets of options by
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143 # repetition. When the script is called, ${initial} is the list of
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144 # options which should appear before all combinations this will
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145 # output. The output looks like a list of subdirectory names with
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146 # leading and trailing slashes.
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147 if [ "$#" != "0" ]; then
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148 first=$1
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149 shift
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150 case "$first" in
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151 *\|*)
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152 all=${initial}`echo $first | sed -e 's_|_/_'g`
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153 first=`echo $first | sed -e 's_|_ _'g`
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154 echo ${all}/
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155 initial="${initial}${all}/" ./tmpmultilib $@
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156 ./tmpmultilib $first $@ | grep -v "^${all}"
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157 ;;
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158 *)
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159 for opt in `echo $first | sed -e 's|/| |'g`; do
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160 echo ${initial}${opt}/
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161 done
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162 ./tmpmultilib $@
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163 for opt in `echo $first | sed -e 's|/| |'g`; do
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164 initial="${initial}${opt}/" ./tmpmultilib $@
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165 done
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166 esac
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167 fi
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168 EOF
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169 chmod +x tmpmultilib
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170
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171 combinations=`initial=/ ./tmpmultilib ${options}`
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172
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173 # If there exceptions, weed them out now
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174 if [ -n "${exceptions}" ]; then
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175 cat >tmpmultilib2 <<\EOF
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176 #!/bin/sh
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177 # This recursive script weeds out any combination of multilib
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178 # switches that should not be generated. The output looks like
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179 # a list of subdirectory names with leading and trailing slashes.
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180
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181 for opt in $@; do
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182 case "$opt" in
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183 EOF
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184
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185 for except in ${exceptions}; do
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186 echo " /${except}/) : ;;" >> tmpmultilib2
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187 done
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188
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189 cat >>tmpmultilib2 <<\EOF
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190 *) echo ${opt};;
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191 esac
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192 done
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193 EOF
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194 chmod +x tmpmultilib2
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195 combinations=`./tmpmultilib2 ${combinations}`
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196 fi
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197
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198 # Construct a sed pattern which will convert option names to directory
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199 # names.
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200 todirnames=
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201 if [ -n "${dirnames}" ]; then
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202 set x ${dirnames}
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203 shift
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204 for set in ${options}; do
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205 for opts in `echo ${set} | sed -e 's|/| |'g`; do
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206 patt="/"
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207 for opt in `echo ${opts} | sed -e 's_|_ _'g`; do
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208 if [ "$1" != "${opt}" ]; then
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209 todirnames="${todirnames} -e s|/${opt}/|/${1}/|g"
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210 patt="${patt}${1}/"
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211 if [ "${patt}" != "/${1}/" ]; then
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212 todirnames="${todirnames} -e s|${patt}|/${1}/|g"
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213 fi
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214 fi
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215 done
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216 shift
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217 done
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218 done
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219 fi
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220
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221 # Construct a sed pattern which will convert option names to OS directory
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222 # names.
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223 toosdirnames=
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224 defaultosdirname=
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225 if [ -n "${osdirnames}" ]; then
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226 set x ${osdirnames}
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227 shift
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228 while [ $# != 0 ] ; do
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229 case "$1" in
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230 .=*)
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231 defaultosdirname=`echo $1 | sed 's|^.=|:|'`
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232 shift
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233 ;;
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234 *=*)
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235 patt=`echo $1 | sed -e 's|=|/$=/|'`
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236 toosdirnames="${toosdirnames} -e s=^/${patt}/="
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237 shift
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238 ;;
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239 *)
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240 break
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241 ;;
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242 esac
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243 done
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244
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245 if [ $# != 0 ]; then
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246 for set in ${options}; do
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247 for opts in `echo ${set} | sed -e 's|/| |'g`; do
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248 patt="/"
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249 for opt in `echo ${opts} | sed -e 's_|_ _'g`; do
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250 if [ "$1" != "${opt}" ]; then
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251 toosdirnames="${toosdirnames} -e s|/${opt}/|/${1}/|g"
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252 patt="${patt}${1}/"
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253 if [ "${patt}" != "/${1}/" ]; then
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254 toosdirnames="${toosdirnames} -e s|${patt}|/${1}/|g"
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255 fi
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256 fi
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257 done
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258 shift
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259 done
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260 done
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261 fi
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262 fi
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263
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264 # We need another recursive shell script to correctly handle positive
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265 # matches. If we are invoked as
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266 # genmultilib "opt1 opt2" "" "opt1=nopt1 opt2=nopt2"
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267 # we must output
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268 # opt1/opt2 opt1 opt2
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269 # opt1/opt2 nopt1 opt2
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270 # opt1/opt2 opt1 nopt2
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271 # opt1/opt2 nopt1 nopt2
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272 # In other words, we must output all combinations of matches.
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273 rm -f tmpmultilib2
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274 cat >tmpmultilib2 <<\EOF
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275 #!/bin/sh
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276 # The positional parameters are a list of matches to consider.
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277 # ${dirout} is the directory name and ${optout} is the current list of
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278 # options.
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279 if [ "$#" = "0" ]; then
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280 echo "\"${dirout} ${optout};\","
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281 else
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282 first=$1
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283 shift
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284 dirout="${dirout}" optout="${optout}" ./tmpmultilib2 $@
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285 l=`echo ${first} | sed -e 's/=.*$//' -e 's/?/=/g'`
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286 r=`echo ${first} | sed -e 's/^.*=//' -e 's/?/=/g'`
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287 if expr " ${optout} " : ".* ${l} .*" > /dev/null; then
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288 newopt=`echo " ${optout} " | sed -e "s/ ${l} / ${r} /" -e 's/^ //' -e 's/ $//'`
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289 dirout="${dirout}" optout="${newopt}" ./tmpmultilib2 $@
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290 fi
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291 fi
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292 EOF
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293 chmod +x tmpmultilib2
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294
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295 # Start with the current directory, which includes only negations.
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296 optout=
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297 for set in ${options}; do
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298 for opt in `echo ${set} | sed -e 's_[/|]_ _g'`; do
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299 optout="${optout} !${opt}"
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300 done
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301 done
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302 optout=`echo ${optout} | sed -e 's/^ //'`
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303 echo "\".${defaultosdirname} ${optout};\","
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304
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305 # Work over the list of combinations. We have to translate each one
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306 # to use the directory names rather than the option names, we have to
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307 # include the information in matches, and we have to generate the
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308 # correct list of options and negations.
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309 for combo in ${combinations}; do
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310 # Use the directory names rather than the option names.
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311 if [ -n "${todirnames}" ]; then
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312 dirout=`echo ${combo} | sed ${todirnames}`
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313 else
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314 dirout=`echo ${combo} | sed -e 's/=/-/g'`
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315 fi
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316 # Remove the leading and trailing slashes.
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317 dirout=`echo ${dirout} | sed -e 's|^/||' -e 's|/$||g'`
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318
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319 # Use the OS directory names rather than the option names.
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320 if [ -n "${toosdirnames}" ]; then
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321 osdirout=`echo ${combo} | sed ${toosdirnames}`
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322 # Remove the leading and trailing slashes.
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323 osdirout=`echo ${osdirout} | sed -e 's|^/||' -e 's|/$||g'`
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324 if [ "x${enable_multilib}" != xyes ]; then
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325 dirout=".:${osdirout}"
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326 disable_multilib=yes
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327 else
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328 case "${osdirout}" in
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329 !*)
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330 dirout=`echo ${osdirout} | sed 's/^!//'`
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331 ;;
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332 *)
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333 dirout="${dirout}:${osdirout}"
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334 ;;
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335 esac
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336 fi
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337 else
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338 if [ "x${enable_multilib}" != xyes ]; then
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339 # genmultilib with --disable-multilib should be
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340 # called with '' '' '' '' '' '' '' no
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341 # if MULTILIB_OSDIRNAMES is empty.
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342 exit 1
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343 fi
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344 fi
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345
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346 # Look through the options. We must output each option that is
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347 # present, and negate each option that is not present.
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348 optout=
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349 for set in ${options}; do
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350 setopts=`echo ${set} | sed -e 's_[/|]_ _g'`
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351 for opt in ${setopts}; do
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352 if expr "${combo} " : ".*/${opt}/.*" > /dev/null; then
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353 optout="${optout} ${opt}"
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354 else
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355 optout="${optout} !${opt}"
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356 fi
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357 done
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358 done
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359 optout=`echo ${optout} | sed -e 's/^ //'`
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360
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361 # Output the line with all appropriate matches.
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362 dirout="${dirout}" optout="${optout}" ./tmpmultilib2
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363 done
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364
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365 # Terminate the list of string.
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366 echo "NULL"
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367 echo "};"
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368
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369 # Output all of the matches now as option and that is the same as that, with
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370 # a semicolon trailer. Include all of the normal options as well.
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371 # Note, the format of the matches is reversed compared
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372 # to what we want, so switch them around.
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373 echo ""
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374 echo "static const char *const multilib_matches_raw[] = {"
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375 for match in ${matches}; do
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376 l=`echo ${match} | sed -e 's/=.*$//' -e 's/?/=/g'`
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377 r=`echo ${match} | sed -e 's/^.*=//' -e 's/?/=/g'`
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378 echo "\"${r} ${l};\","
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379 done
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380 for set in ${options}; do
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381 for opt in `echo ${set} | sed -e 's_[/|]_ _'g`; do
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382 echo "\"${opt} ${opt};\","
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383 done
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384 done
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385 echo "NULL"
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386 echo "};"
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387
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388 # Output the default options now
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389 echo ""
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390 echo "static const char *multilib_extra = \"${extra}\";"
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391
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392 # Output the exclusion rules now
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393 echo ""
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394 echo "static const char *const multilib_exclusions_raw[] = {"
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395 for rule in ${exclusions}; do
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396 s=`echo ${rule} | sed -e 's,/, ,g'`
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397 echo "\"${s};\","
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398 done
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399 echo "NULL"
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400 echo "};"
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401
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402 # Output the options now
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403 moptions=`echo ${options} | sed -e 's,[ ][ ]*, ,g'`
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404 echo ""
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405 echo "static const char *multilib_options = \"${moptions}\";"
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406
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407 # Finally output the disable flag if specified
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408 if [ "x${disable_multilib}" = xyes ]; then
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409 echo ""
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410 echo "#define DISABLE_MULTILIB 1"
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411 fi
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412
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413 cd ..
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414 rm -r tmpmultilib.$$
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415
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416 exit 0
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