[8833] | 1 | #!/bin/sh |
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| 2 | # Generates multilib.h. |
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| 3 | # Copyright (C) 1994, 1995 Free Software Foundation, Inc. |
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| 4 | |
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| 5 | #This file is part of GNU CC. |
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| 6 | |
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| 7 | #GNU CC 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 2, or (at your option) |
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| 10 | #any later version. |
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| 11 | |
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| 12 | #GNU CC 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 GNU CC; see the file COPYING. If not, write to |
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| 19 | #the Free Software Foundation, 59 Temple Place - Suite 330, |
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| 20 | #Boston, MA 02111-1307, USA. |
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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. No leading dash is used on the options. |
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| 29 | # Each option in a set is mutually incompatible with all other options |
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| 30 | # in the set. |
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| 31 | |
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| 32 | # The optional second argument is a list of subdirectory names. If |
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| 33 | # the second argument is non-empty, there must be as many elements in |
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| 34 | # the second argument as there are options in the first argument. The |
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| 35 | # elements in the second list are separated by spaces. If the second |
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| 36 | # argument is empty, the option names will be used as the directory |
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| 37 | # names. |
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| 38 | |
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| 39 | # The optional third argument is a list of options which are |
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| 40 | # identical. The elements in the list are separated by spaces. Each |
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| 41 | # element must be of the form OPTION=OPTION. The first OPTION should |
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| 42 | # appear in the first argument, and the second should be a synonym for |
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| 43 | # it. Question marks are replaced with equal signs in both options. |
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| 44 | |
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| 45 | # The output looks like |
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| 46 | # #define MULTILIB_MATCHES "\ |
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| 47 | # SUBDIRECTORY OPTIONS;\ |
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| 48 | # ... |
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| 49 | # " |
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| 50 | # The SUBDIRECTORY is the subdirectory to use. The OPTIONS are |
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| 51 | # multiple options separated by spaces. Each option may start with an |
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| 52 | # exclamation point. gcc will consider each line in turn. If none of |
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| 53 | # the options beginning with an exclamation point are present, and all |
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| 54 | # of the other options are present, that subdirectory will be used. |
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| 55 | # The order of the subdirectories is such that they can be created in |
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| 56 | # order; that is, a subdirectory is preceded by all its parents. |
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| 57 | |
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| 58 | # Here is a example (this is simplified from the actual 680x0 case): |
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| 59 | # genmultilib "m68000/m68020 msoft-float" "m68000 m68020 msoft-float" |
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| 60 | # "m68000=mc68000" |
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| 61 | # This produces: |
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| 62 | # #define MULTILIB_SELECT "\ |
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| 63 | # . !m68000 !mc68000 !m68020 !msoft-float;\ |
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| 64 | # m68000 m68000 !m68020 !msoft-float;\ |
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| 65 | # m68000 mc60000 !m68020 !msoft-float;\ |
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| 66 | # m68020 !m68000 !mc68000 m68020 !msoft-float;\ |
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| 67 | # msoft-float !m68000 !mc68000 !m68020 msoft-float;\ |
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| 68 | # m68000/msoft-float m68000 !m68020 msoft-float;\ |
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| 69 | # m68000/msoft-float mc68000 !m68020 msoft-float;\ |
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| 70 | # m68020/msoft-float !m68000 !mc68000 m68020 msoft-float;\ |
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| 71 | # " |
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| 72 | # The effect is that `gcc -msoft-float' (for example) will append |
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| 73 | # msoft-float to the directory name when searching for libraries or |
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| 74 | # startup files, and `gcc -m68000 -msoft-float' (for example) will |
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| 75 | # append m68000/msoft-float. |
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| 76 | |
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| 77 | # Copy the positional parameters into variables. |
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| 78 | options=$1 |
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| 79 | dirnames=$2 |
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| 80 | matches=$3 |
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| 81 | |
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| 82 | # What we want to do is select all combinations of the sets in |
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| 83 | # options. Each combination which includes a set of mutually |
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| 84 | # exclusive options must then be output multiple times, once for each |
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| 85 | # item in the set. Selecting combinations is a recursive process. |
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| 86 | # Since not all versions of sh support functions, we achieve recursion |
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| 87 | # by creating a temporary shell script which invokes itself. |
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| 88 | rm -f tmpmultilib |
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| 89 | cat >tmpmultilib <<\EOF |
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| 90 | #!/bin/sh |
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| 91 | # This recursive script basically outputs all combinations of its |
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| 92 | # input arguments, handling mutually exclusive sets of options by |
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| 93 | # repetition. When the script is called, ${initial} is the list of |
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| 94 | # options which should appear before all combinations this will |
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| 95 | # output. The output looks like a list of subdirectory names with |
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| 96 | # leading and trailing slashes. |
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| 97 | if [ "$#" != "0" ]; then |
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| 98 | first=$1 |
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| 99 | shift |
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| 100 | for opt in `echo $first | sed -e 's|/| |'g`; do |
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| 101 | echo ${initial}${opt}/ |
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| 102 | done |
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| 103 | ./tmpmultilib $@ |
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| 104 | for opt in `echo $first | sed -e 's|/| |'g`; do |
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| 105 | initial="${initial}${opt}/" ./tmpmultilib $@ |
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| 106 | done |
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| 107 | fi |
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| 108 | EOF |
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| 109 | chmod +x tmpmultilib |
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| 110 | |
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| 111 | combinations=`initial=/ ./tmpmultilib ${options}` |
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| 112 | |
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| 113 | rm -f tmpmultilib |
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| 114 | |
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| 115 | # Construct a sed pattern which will convert option names to directory |
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| 116 | # names. |
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| 117 | todirnames= |
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| 118 | if [ -n "${dirnames}" ]; then |
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| 119 | set x ${dirnames} |
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| 120 | shift |
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| 121 | for set in ${options}; do |
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| 122 | for opt in `echo ${set} | sed -e 's|/| |'g`; do |
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| 123 | if [ "$1" != "${opt}" ]; then |
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| 124 | todirnames="${todirnames} -e s|/${opt}/|/${1}/|g" |
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| 125 | fi |
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| 126 | shift |
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| 127 | done |
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| 128 | done |
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| 129 | fi |
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| 130 | |
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| 131 | # Construct a sed pattern which will add negations based on the |
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| 132 | # matches. The semicolons are easier than getting the shell to accept |
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| 133 | # quoted spaces when expanding a variable. |
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| 134 | matchnegations= |
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| 135 | for i in ${matches}; do |
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| 136 | l=`echo $i | sed -e 's/=.*$//' -e 's/?/=/g'` |
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| 137 | r=`echo $i | sed -e 's/^.*=//' -e 's/?/=/g'` |
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| 138 | matchnegations="${matchnegations} -e s/;!${l};/;!${l};!${r};/" |
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| 139 | done |
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| 140 | |
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| 141 | # We need another recursive shell script to correctly handle positive |
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| 142 | # matches. If we are invoked as |
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| 143 | # genmultilib "opt1 opt2" "" "opt1=nopt1 opt2=nopt2" |
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| 144 | # we must output |
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| 145 | # opt1/opt2 opt1 opt2 |
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| 146 | # opt1/opt2 nopt1 opt2 |
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| 147 | # opt1/opt2 opt1 nopt2 |
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| 148 | # opt1/opt2 nopt1 nopt2 |
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| 149 | # In other words, we must output all combinations of matches. |
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| 150 | rm -f tmpmultilib2 |
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| 151 | cat >tmpmultilib2 <<\EOF |
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| 152 | #!/bin/sh |
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| 153 | # The positional parameters are a list of matches to consider. |
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| 154 | # ${dirout} is the directory name and ${optout} is the current list of |
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| 155 | # options. |
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| 156 | if [ "$#" = "0" ]; then |
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| 157 | echo "${dirout} ${optout};\\" |
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| 158 | else |
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| 159 | first=$1 |
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| 160 | shift |
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| 161 | dirout="${dirout}" optout="${optout}" ./tmpmultilib2 $@ |
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| 162 | l=`echo ${first} | sed -e 's/=.*$//' -e 's/?/=/g'` |
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| 163 | r=`echo ${first} | sed -e 's/^.*=//' -e 's/?/=/g'` |
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| 164 | if expr " ${optout} " : ".* ${l} .*" > /dev/null; then |
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| 165 | newopt=`echo " ${optout} " | sed -e "s/ ${l} / ${r} /" -e 's/^ //' -e 's/ $//'` |
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| 166 | dirout="${dirout}" optout="${newopt}" ./tmpmultilib2 $@ |
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| 167 | fi |
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| 168 | fi |
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| 169 | EOF |
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| 170 | chmod +x tmpmultilib2 |
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| 171 | |
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| 172 | # We are ready to start output. |
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| 173 | echo '#define MULTILIB_SELECT "\' |
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| 174 | |
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| 175 | # Start with the current directory, which includes only negations. |
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| 176 | optout= |
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| 177 | for set in ${options}; do |
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| 178 | for opt in `echo ${set} | sed -e 's|/| |'g`; do |
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| 179 | optout="${optout} !${opt}" |
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| 180 | done |
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| 181 | done |
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| 182 | optout=`echo ${optout} | sed -e 's/^ //'` |
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| 183 | if [ -n "${matchnegations}" ]; then |
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| 184 | optout=`echo ";${optout};" | sed -e 's/ /;/g' ${matchnegations} -e 's/^;//' -e 's/;$//' -e 's/;/ /g'` |
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| 185 | fi |
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| 186 | echo ". ${optout};\\" |
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| 187 | |
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| 188 | # Work over the list of combinations. We have to translate each one |
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| 189 | # to use the directory names rather than the option names, we have to |
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| 190 | # include the information in matches, and we have to generate the |
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| 191 | # correct list of options and negations. |
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| 192 | for combo in ${combinations}; do |
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| 193 | # Use the directory names rather than the option names. |
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| 194 | if [ -n "${todirnames}" ]; then |
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| 195 | dirout=`echo ${combo} | sed ${todirnames}` |
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| 196 | else |
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| 197 | dirout=${combo} |
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| 198 | fi |
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| 199 | # Remove the leading and trailing slashes. |
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| 200 | dirout=`echo ${dirout} | sed -e 's|^/||' -e 's|/$||g'` |
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| 201 | |
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| 202 | # Look through the options. We must output each option that is |
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| 203 | # present, and negate each option that is not present. |
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| 204 | optout= |
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| 205 | for set in ${options}; do |
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| 206 | setopts=`echo ${set} | sed -e 's|/| |g'` |
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| 207 | for opt in ${setopts}; do |
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| 208 | if expr "${combo} " : ".*/${opt}/.*" > /dev/null; then |
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| 209 | optout="${optout} ${opt}" |
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| 210 | else |
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| 211 | optout="${optout} !${opt}" |
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| 212 | fi |
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| 213 | done |
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| 214 | done |
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| 215 | optout=`echo ${optout} | sed -e 's/^ //'` |
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| 216 | |
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| 217 | # Add any negations of matches. |
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| 218 | if [ -n "${matchnegations}" ]; then |
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| 219 | optout=`echo ";${optout};" | sed -e 's/ /;/g' ${matchnegations} -e 's/^;//' -e 's/;$//' -e 's/;/ /g'` |
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| 220 | fi |
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| 221 | |
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| 222 | # Output the line with all appropriate matches. |
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| 223 | dirout="${dirout}" optout="${optout}" ./tmpmultilib2 ${matches} |
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| 224 | done |
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| 225 | |
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| 226 | rm -f tmpmultilib2 |
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| 227 | |
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| 228 | # That's it. |
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| 229 | echo '"' |
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| 230 | |
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| 231 | exit 0 |
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