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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