gcc/genmultilib

   1 #!/bin/sh
   2 # Generates multilib.h.
   3 #   Copyright (C) 1994, 1995, 1996, 1997, 1999 Free Software Foundation, Inc.
   4
   5 #This file is part of GCC.
   6
   7 #GCC is free software; you can redistribute it and/or modify it under
   8 #the terms of the GNU General Public License as published by the Free
   9 #Software Foundation; either version 2, or (at your option) any later
  10 #version.
  11
  12 #GCC is distributed in the hope that it will be useful, but WITHOUT
  13 #ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14 #FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  15 #for more details.
  16
  17 #You should have received a copy of the GNU General Public License
  18 #along with GCC; see the file COPYING.  If not, write to the Free
  19 #Software Foundation, 59 Temple Place - Suite 330, Boston, MA
  20 #02111-1307, USA.
  21
  22 # This shell script produces a header file which the gcc driver
  23 # program uses to pick which library to use based on the machine
  24 # specific options that it is given.
  25
  26 # The first argument is a list of sets of options.  The elements in
  27 # the list are separated by spaces.  Within an element, the options
  28 # are separated by slashes or pipes.  No leading dash is used on the
  29 # options.
  30 # Each option in a set separated by slashes is mutually incompatible
  31 # with all other options
  32 # in the set.
  33 # Each option in a set separated by pipes will be used for the library
  34 # compilation and any of the options in the set will be sufficient
  35 # for it to be triggered.
  36
  37 # The optional second argument is a list of subdirectory names.  If
  38 # the second argument is non-empty, there must be as many elements in
  39 # the second argument as there are options in the first argument.  The
  40 # elements in the second list are separated by spaces.  If the second
  41 # argument is empty, the option names will be used as the directory
  42 # names.
  43
  44 # The optional third argument is a list of options which are
  45 # identical.  The elements in the list are separated by spaces.  Each
  46 # element must be of the form OPTION=OPTION.  The first OPTION should
  47 # appear in the first argument, and the second should be a synonym for
  48 # it.  Question marks are replaced with equal signs in both options.
  49
  50 # The optional fourth argument is a list of multilib directory
  51 # combinations that should not be built.
  52
  53 # The optional fifth argument is a list of options that should be
  54 # used whenever building multilib libraries.
  55
  56 # The optional sixth argument is a list of exclusions used internally by
  57 # the compiler similar to exceptions. The difference being that exclusions
  58 # allow matching default options that genmultilib does not know about and
  59 # is done at runtime as opposed to being sorted out at compile time.
  60 # Each element in the list is a separate exclusion rule. Each rule is
  61 # a list of options (sans preceding '-') separated by a '/'. The options
  62 # on the rule are grouped as an AND operation, and all options much match
  63 # for the rule to exclude a set. Options can be preceded with a '!' to
  64 # match a logical NOT.
  65
  66 # The output looks like
  67 #   #define MULTILIB_MATCHES "\
  68 #   SUBDIRECTORY OPTIONS;\
  69 #   ...
  70 #   "
  71 # The SUBDIRECTORY is the subdirectory to use.  The OPTIONS are
  72 # multiple options separated by spaces.  Each option may start with an
  73 # exclamation point.  gcc will consider each line in turn.  If none of
  74 # the options beginning with an exclamation point are present, and all
  75 # of the other options are present, that subdirectory will be used.
  76 # The order of the subdirectories is such that they can be created in
  77 # order; that is, a subdirectory is preceded by all its parents.
  78
  79 # Here is an example (this is from the actual sparc64 case):
  80 #   genmultilib 'm64/m32 mno-app-regs|mcmodel=medany' '64 32 alt'
  81 #               'mcmodel?medany=mcmodel?medmid' 'm32/mno-app-regs* m32/mcmodel=*'
  82 #               'm32/!m64/mno-app-regs m32/!m64/mcmodel=medany'
  83 # This produces:
  84 #   ". !m64 !m32 !mno-app-regs !mcmodel=medany;",
  85 #   "64 m64 !m32 !mno-app-regs !mcmodel=medany;",
  86 #   "32 !m64 m32 !mno-app-regs !mcmodel=medany;",
  87 #   "alt !m64 !m32 mno-app-regs mcmodel=medany;",
  88 #   "alt !m64 !m32 mno-app-regs !mcmodel=medany;",
  89 #   "alt !m64 !m32 !mno-app-regs mcmodel=medany;",
  90 #   "64/alt m64 !m32 mno-app-regs mcmodel=medany;",
  91 #   "64/alt m64 !m32 mno-app-regs !mcmodel=medany;",
  92 #   "64/alt m64 !m32 !mno-app-regs mcmodel=medany;",
  93 #
  94 # The effect is that `gcc -mno-app-regs' (for example) will append "alt"
  95 # to the directory name when searching for libraries or startup files and
  96 # `gcc -m32 -mcmodel=medany' (for example) will append "32/alt". Also note
  97 # that exclusion above is moot, unless the compiler had a default of -m32,
  98 # which would mean that all of the "alt" directories (not the 64/alt ones)
  99 # would be ignored (not generated, nor used) since the exclusion also
 100 # matches the multilib_default args.
 101
 102 # Copy the positional parameters into variables.
 103 options=$1
 104 dirnames=$2
 105 matches=$3
 106 exceptions=$4
 107 extra=$5
 108 exclusions=$6
 109
 110 echo "static const char *const multilib_raw[] = {"
 111
 112 # What we want to do is select all combinations of the sets in
 113 # options.  Each combination which includes a set of mutually
 114 # exclusive options must then be output multiple times, once for each
 115 # item in the set.  Selecting combinations is a recursive process.
 116 # Since not all versions of sh support functions, we achieve recursion
 117 # by creating a temporary shell script which invokes itself.
 118 rm -f tmpmultilib
 119 cat >tmpmultilib <<\EOF
 120 #!/bin/sh
 121 # This recursive script basically outputs all combinations of its
 122 # input arguments, handling mutually exclusive sets of options by
 123 # repetition.  When the script is called, ${initial} is the list of
 124 # options which should appear before all combinations this will
 125 # output.  The output looks like a list of subdirectory names with
 126 # leading and trailing slashes.
 127 if [ "$#" != "0" ]; then
 128   first=$1
 129   shift
 130   case "$first" in
 131   *\|*)
 132     all=${initial}`echo $first | sed -e 's_|_/_'g`
 133     first=`echo $first | sed -e 's_|_ _'g`
 134     echo ${all}/
 135     initial="${initial}${all}/" ./tmpmultilib $@
 136     ./tmpmultilib $first $@ | grep -v "^${all}"
 137     ;;
 138   *)
 139     for opt in `echo $first | sed -e 's|/| |'g`; do
 140       echo ${initial}${opt}/
 141     done
 142     ./tmpmultilib $@
 143     for opt in `echo $first | sed -e 's|/| |'g`; do
 144       initial="${initial}${opt}/" ./tmpmultilib $@
 145     done
 146   esac
 147 fi
 148 EOF
 149 chmod +x tmpmultilib
 150
 151 combinations=`initial=/ ./tmpmultilib ${options}`
 152
 153 rm -f tmpmultilib
 154
 155 # If there exceptions, weed them out now
 156 if [ -n "${exceptions}" ]; then
 157   rm -f tmpmultilib2
 158   cat >tmpmultilib2 <<\EOF
 159 #!/bin/sh
 160 # This recursive script weeds out any combination of multilib
 161 # switches that should not be generated.  The output looks like
 162 # a list of subdirectory names with leading and trailing slashes.
 163
 164   for opt in $@; do
 165     case "$opt" in
 166 EOF
 167
 168   for except in ${exceptions}; do
 169     echo "      /${except}/) : ;;" >> tmpmultilib2
 170   done
 171
 172 cat >>tmpmultilib2 <<\EOF
 173       *) echo ${opt};;
 174     esac
 175   done
 176 EOF
 177   chmod +x tmpmultilib2
 178   combinations=`./tmpmultilib2 ${combinations}`
 179   rm -f ./tmpmultilib2
 180 fi
 181
 182 # Construct a sed pattern which will convert option names to directory
 183 # names.
 184 todirnames=
 185 if [ -n "${dirnames}" ]; then
 186   set x ${dirnames}
 187   shift
 188   for set in ${options}; do
 189     for opts in `echo ${set} | sed -e 's|/| |'g`; do
 190       patt="/"
 191       for opt in `echo ${opts} | sed -e 's_|_ _'g`; do
 192         if [ "$1" != "${opt}" ]; then
 193           todirnames="${todirnames} -e s|/${opt}/|/${1}/|g"
 194           patt="${patt}${1}/"
 195           if [ "${patt}" != "/${1}/" ]; then
 196             todirnames="${todirnames} -e s|${patt}|/${1}/|g"
 197           fi
 198         fi
 199       done
 200       shift
 201     done
 202   done
 203 fi
 204
 205 # We need another recursive shell script to correctly handle positive
 206 # matches.  If we are invoked as
 207 #   genmultilib "opt1 opt2" "" "opt1=nopt1 opt2=nopt2"
 208 # we must output
 209 #   opt1/opt2 opt1 opt2
 210 #   opt1/opt2 nopt1 opt2
 211 #   opt1/opt2 opt1 nopt2
 212 #   opt1/opt2 nopt1 nopt2
 213 # In other words, we must output all combinations of matches.
 214 rm -f tmpmultilib2
 215 cat >tmpmultilib2 <<\EOF
 216 #!/bin/sh
 217 # The positional parameters are a list of matches to consider.
 218 # ${dirout} is the directory name and ${optout} is the current list of
 219 # options.
 220 if [ "$#" = "0" ]; then
 221   echo "\"${dirout} ${optout};\","
 222 else
 223   first=$1
 224   shift
 225   dirout="${dirout}" optout="${optout}" ./tmpmultilib2 $@
 226   l=`echo ${first} | sed -e 's/=.*$//' -e 's/?/=/g'`
 227   r=`echo ${first} | sed -e 's/^.*=//' -e 's/?/=/g'`
 228   if expr " ${optout} " : ".* ${l} .*" > /dev/null; then
 229     newopt=`echo " ${optout} " | sed -e "s/ ${l} / ${r} /" -e 's/^ //' -e 's/ $//'`
 230     dirout="${dirout}" optout="${newopt}" ./tmpmultilib2 $@
 231   fi
 232 fi
 233 EOF
 234 chmod +x tmpmultilib2
 235
 236 # Start with the current directory, which includes only negations.
 237 optout=
 238 for set in ${options}; do
 239   for opt in `echo ${set} | sed -e 's_[/|]_ _g'`; do
 240     optout="${optout} !${opt}"
 241   done
 242 done
 243 optout=`echo ${optout} | sed -e 's/^ //'`
 244 echo "\". ${optout};\","
 245
 246 # Work over the list of combinations.  We have to translate each one
 247 # to use the directory names rather than the option names, we have to
 248 # include the information in matches, and we have to generate the
 249 # correct list of options and negations.
 250 for combo in ${combinations}; do
 251   # Use the directory names rather than the option names.
 252   if [ -n "${todirnames}" ]; then
 253     dirout=`echo ${combo} | sed ${todirnames}`
 254   else
 255     dirout=${combo}
 256   fi
 257   # Remove the leading and trailing slashes.
 258   dirout=`echo ${dirout} | sed -e 's|^/||' -e 's|/$||g'`
 259
 260   # Look through the options.  We must output each option that is
 261   # present, and negate each option that is not present.
 262   optout=
 263   for set in ${options}; do
 264     setopts=`echo ${set} | sed -e 's_[/|]_ _g'`
 265     for opt in ${setopts}; do
 266       if expr "${combo} " : ".*/${opt}/.*" > /dev/null; then
 267         optout="${optout} ${opt}"
 268       else
 269         optout="${optout} !${opt}"
 270       fi
 271     done
 272   done
 273   optout=`echo ${optout} | sed -e 's/^ //'`
 274
 275   # Output the line with all appropriate matches.
 276   dirout="${dirout}" optout="${optout}" ./tmpmultilib2
 277 done
 278
 279 # Terminate the list of string.
 280 echo "NULL"
 281 echo "};"
 282
 283 # Output all of the matches now as option and that is the same as that, with
 284 # a semicolon trailer.  Include all of the normal options as well.
 285 # Note, the format of the matches is reversed compared
 286 # to what we want, so switch them around.
 287 echo ""
 288 echo "static const char *const multilib_matches_raw[] = {"
 289 for match in ${matches}; do
 290   l=`echo ${match} | sed -e 's/=.*$//' -e 's/?/=/g'`
 291   r=`echo ${match} | sed -e 's/^.*=//' -e 's/?/=/g'`
 292   echo "\"${r} ${l};\","
 293 done
 294 for set in ${options}; do
 295   for opt in `echo ${set} | sed -e 's_[/|]_ _'g`; do
 296     echo "\"${opt} ${opt};\","
 297   done
 298 done
 299 echo "NULL"
 300 echo "};"
 301
 302 # Output the default options now
 303 echo ""
 304 echo "static const char *multilib_extra = \"${extra}\";"
 305
 306 # Output the exclusion rules now
 307 echo ""
 308 echo "static const char *const multilib_exclusions_raw[] = {"
 309 for rule in ${exclusions}; do
 310   s=`echo ${rule} | sed -e 's,/, ,g'`
 311   echo "\"${s};\","
 312 done
 313 echo "NULL"
 314 echo "};"
 315
 316 rm -f tmpmultilib2
 317
 318 exit 0