gcc/genmultilib

   1 #!/bin/sh
   2 # Generates multilib.h.
   3 #   Copyright (C) 1994, 1995, 1996, 1997, 1999, 2002 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 optional sevenths argument is a list of OS subdirectory names.
  67 # The format is the same as of the second argument.
  68 # The difference is that second argument describes multilib directories
  69 # in GCC conventions, while this one the OS multilib convention.
  70
  71 # The last option should be "yes" if multilibs are enabled.  If it is not
  72 # "yes", all GCC multilib dir names will be ".".
  73
  74 # The output looks like
  75 #   #define MULTILIB_MATCHES "\
  76 #   SUBDIRECTORY OPTIONS;\
  77 #   ...
  78 #   "
  79 # The SUBDIRECTORY is the subdirectory to use.  The OPTIONS are
  80 # multiple options separated by spaces.  Each option may start with an
  81 # exclamation point.  gcc will consider each line in turn.  If none of
  82 # the options beginning with an exclamation point are present, and all
  83 # of the other options are present, that subdirectory will be used.
  84 # The order of the subdirectories is such that they can be created in
  85 # order; that is, a subdirectory is preceded by all its parents.
  86
  87 # Here is an example (this is from the actual sparc64 case):
  88 #   genmultilib 'm64/m32 mno-app-regs|mcmodel=medany' '64 32 alt'
  89 #               'mcmodel?medany=mcmodel?medmid' 'm32/mno-app-regs* m32/mcmodel=*'
  90 #               '' 'm32/!m64/mno-app-regs m32/!m64/mcmodel=medany'
  91 #               '../lib64 ../lib32 alt' yes
  92 # This produces:
  93 #   ". !m64 !m32 !mno-app-regs !mcmodel=medany;",
  94 #   "64:../lib64 m64 !m32 !mno-app-regs !mcmodel=medany;",
  95 #   "32:../lib32 !m64 m32 !mno-app-regs !mcmodel=medany;",
  96 #   "alt !m64 !m32 mno-app-regs mcmodel=medany;",
  97 #   "alt !m64 !m32 mno-app-regs !mcmodel=medany;",
  98 #   "alt !m64 !m32 !mno-app-regs mcmodel=medany;",
  99 #   "64/alt:../lib64/alt m64 !m32 mno-app-regs mcmodel=medany;",
 100 #   "64/alt:../lib64/alt m64 !m32 mno-app-regs !mcmodel=medany;",
 101 #   "64/alt:../lib64/alt m64 !m32 !mno-app-regs mcmodel=medany;",
 102 #
 103 # The effect is that `gcc -mno-app-regs' (for example) will append "alt"
 104 # to the directory name when searching for libraries or startup files and
 105 # `gcc -m32 -mcmodel=medany' (for example) will append "32/alt". Also note
 106 # that exclusion above is moot, unless the compiler had a default of -m32,
 107 # which would mean that all of the "alt" directories (not the 64/alt ones)
 108 # would be ignored (not generated, nor used) since the exclusion also
 109 # matches the multilib_default args.
 110
 111 # Copy the positional parameters into variables.
 112 options=$1
 113 dirnames=$2
 114 matches=$3
 115 exceptions=$4
 116 extra=$5
 117 exclusions=$6
 118 osdirnames=$7
 119 enable_multilib=$8
 120
 121 echo "static const char *const multilib_raw[] = {"
 122
 123 mkdir tmpmultilib.$$ || exit 1
 124 # Use cd ./foo to avoid CDPATH output.
 125 cd ./tmpmultilib.$$ || exit 1
 126
 127 # What we want to do is select all combinations of the sets in
 128 # options.  Each combination which includes a set of mutually
 129 # exclusive options must then be output multiple times, once for each
 130 # item in the set.  Selecting combinations is a recursive process.
 131 # Since not all versions of sh support functions, we achieve recursion
 132 # by creating a temporary shell script which invokes itself.
 133 rm -f tmpmultilib
 134 cat >tmpmultilib <<\EOF
 135 #!/bin/sh
 136 # This recursive script basically outputs all combinations of its
 137 # input arguments, handling mutually exclusive sets of options by
 138 # repetition.  When the script is called, ${initial} is the list of
 139 # options which should appear before all combinations this will
 140 # output.  The output looks like a list of subdirectory names with
 141 # leading and trailing slashes.
 142 if [ "$#" != "0" ]; then
 143   first=$1
 144   shift
 145   case "$first" in
 146   *\|*)
 147     all=${initial}`echo $first | sed -e 's_|_/_'g`
 148     first=`echo $first | sed -e 's_|_ _'g`
 149     echo ${all}/
 150     initial="${initial}${all}/" ./tmpmultilib $@
 151     ./tmpmultilib $first $@ | grep -v "^${all}"
 152     ;;
 153   *)
 154     for opt in `echo $first | sed -e 's|/| |'g`; do
 155       echo ${initial}${opt}/
 156     done
 157     ./tmpmultilib $@
 158     for opt in `echo $first | sed -e 's|/| |'g`; do
 159       initial="${initial}${opt}/" ./tmpmultilib $@
 160     done
 161   esac
 162 fi
 163 EOF
 164 chmod +x tmpmultilib
 165
 166 combinations=`initial=/ ./tmpmultilib ${options}`
 167
 168 # If there exceptions, weed them out now
 169 if [ -n "${exceptions}" ]; then
 170   cat >tmpmultilib2 <<\EOF
 171 #!/bin/sh
 172 # This recursive script weeds out any combination of multilib
 173 # switches that should not be generated.  The output looks like
 174 # a list of subdirectory names with leading and trailing slashes.
 175
 176   for opt in $@; do
 177     case "$opt" in
 178 EOF
 179
 180   for except in ${exceptions}; do
 181     echo "      /${except}/) : ;;" >> tmpmultilib2
 182   done
 183
 184 cat >>tmpmultilib2 <<\EOF
 185       *) echo ${opt};;
 186     esac
 187   done
 188 EOF
 189   chmod +x tmpmultilib2
 190   combinations=`./tmpmultilib2 ${combinations}`
 191 fi
 192
 193 # Construct a sed pattern which will convert option names to directory
 194 # names.
 195 todirnames=
 196 if [ -n "${dirnames}" ]; then
 197   set x ${dirnames}
 198   shift
 199   for set in ${options}; do
 200     for opts in `echo ${set} | sed -e 's|/| |'g`; do
 201       patt="/"
 202       for opt in `echo ${opts} | sed -e 's_|_ _'g`; do
 203         if [ "$1" != "${opt}" ]; then
 204           todirnames="${todirnames} -e s|/${opt}/|/${1}/|g"
 205           patt="${patt}${1}/"
 206           if [ "${patt}" != "/${1}/" ]; then
 207             todirnames="${todirnames} -e s|${patt}|/${1}/|g"
 208           fi
 209         fi
 210       done
 211       shift
 212     done
 213   done
 214 fi
 215
 216 # Construct a sed pattern which will convert option names to OS directory
 217 # names.
 218 toosdirnames=
 219 if [ -n "${osdirnames}" ]; then
 220   set x ${osdirnames}
 221   shift
 222   for set in ${options}; do
 223     for opts in `echo ${set} | sed -e 's|/| |'g`; do
 224       patt="/"
 225       for opt in `echo ${opts} | sed -e 's_|_ _'g`; do
 226         if [ "$1" != "${opt}" ]; then
 227           toosdirnames="${toosdirnames} -e s|/${opt}/|/${1}/|g"
 228           patt="${patt}${1}/"
 229           if [ "${patt}" != "/${1}/" ]; then
 230             toosdirnames="${toosdirnames} -e s|${patt}|/${1}/|g"
 231           fi
 232         fi
 233       done
 234       shift
 235     done
 236   done
 237 fi
 238
 239 # We need another recursive shell script to correctly handle positive
 240 # matches.  If we are invoked as
 241 #   genmultilib "opt1 opt2" "" "opt1=nopt1 opt2=nopt2"
 242 # we must output
 243 #   opt1/opt2 opt1 opt2
 244 #   opt1/opt2 nopt1 opt2
 245 #   opt1/opt2 opt1 nopt2
 246 #   opt1/opt2 nopt1 nopt2
 247 # In other words, we must output all combinations of matches.
 248 rm -f tmpmultilib2
 249 cat >tmpmultilib2 <<\EOF
 250 #!/bin/sh
 251 # The positional parameters are a list of matches to consider.
 252 # ${dirout} is the directory name and ${optout} is the current list of
 253 # options.
 254 if [ "$#" = "0" ]; then
 255   echo "\"${dirout} ${optout};\","
 256 else
 257   first=$1
 258   shift
 259   dirout="${dirout}" optout="${optout}" ./tmpmultilib2 $@
 260   l=`echo ${first} | sed -e 's/=.*$//' -e 's/?/=/g'`
 261   r=`echo ${first} | sed -e 's/^.*=//' -e 's/?/=/g'`
 262   if expr " ${optout} " : ".* ${l} .*" > /dev/null; then
 263     newopt=`echo " ${optout} " | sed -e "s/ ${l} / ${r} /" -e 's/^ //' -e 's/ $//'`
 264     dirout="${dirout}" optout="${newopt}" ./tmpmultilib2 $@
 265   fi
 266 fi
 267 EOF
 268 chmod +x tmpmultilib2
 269
 270 # Start with the current directory, which includes only negations.
 271 optout=
 272 for set in ${options}; do
 273   for opt in `echo ${set} | sed -e 's_[/|]_ _g'`; do
 274     optout="${optout} !${opt}"
 275   done
 276 done
 277 optout=`echo ${optout} | sed -e 's/^ //'`
 278 echo "\". ${optout};\","
 279
 280 # Work over the list of combinations.  We have to translate each one
 281 # to use the directory names rather than the option names, we have to
 282 # include the information in matches, and we have to generate the
 283 # correct list of options and negations.
 284 for combo in ${combinations}; do
 285   # Use the directory names rather than the option names.
 286   if [ -n "${todirnames}" ]; then
 287     dirout=`echo ${combo} | sed ${todirnames}`
 288   else
 289     dirout=${combo}
 290   fi
 291   # Remove the leading and trailing slashes.
 292   dirout=`echo ${dirout} | sed -e 's|^/||' -e 's|/$||g'`
 293
 294   # Use the OS directory names rather than the option names.
 295   if [ -n "${toosdirnames}" ]; then
 296     osdirout=`echo ${combo} | sed ${toosdirnames}`
 297     # Remove the leading and trailing slashes.
 298     osdirout=`echo ${osdirout} | sed -e 's|^/||' -e 's|/$||g'`
 299     if [ "x${enable_multilib}" != xyes ]; then
 300       dirout=".:${osdirout}"
 301     else
 302       dirout="${dirout}:${osdirout}"
 303     fi
 304   else
 305     if [ "x${enable_multilib}" != xyes ]; then
 306       # genmultilib with --disable-multilib should be
 307       # called with '' '' '' '' '' '' '' no
 308       # if MULTILIB_OSDIRNAMES is empty.
 309       exit 1
 310     fi
 311   fi
 312
 313   # Look through the options.  We must output each option that is
 314   # present, and negate each option that is not present.
 315   optout=
 316   for set in ${options}; do
 317     setopts=`echo ${set} | sed -e 's_[/|]_ _g'`
 318     for opt in ${setopts}; do
 319       if expr "${combo} " : ".*/${opt}/.*" > /dev/null; then
 320         optout="${optout} ${opt}"
 321       else
 322         optout="${optout} !${opt}"
 323       fi
 324     done
 325   done
 326   optout=`echo ${optout} | sed -e 's/^ //'`
 327
 328   # Output the line with all appropriate matches.
 329   dirout="${dirout}" optout="${optout}" ./tmpmultilib2
 330 done
 331
 332 # Terminate the list of string.
 333 echo "NULL"
 334 echo "};"
 335
 336 # Output all of the matches now as option and that is the same as that, with
 337 # a semicolon trailer.  Include all of the normal options as well.
 338 # Note, the format of the matches is reversed compared
 339 # to what we want, so switch them around.
 340 echo ""
 341 echo "static const char *const multilib_matches_raw[] = {"
 342 for match in ${matches}; do
 343   l=`echo ${match} | sed -e 's/=.*$//' -e 's/?/=/g'`
 344   r=`echo ${match} | sed -e 's/^.*=//' -e 's/?/=/g'`
 345   echo "\"${r} ${l};\","
 346 done
 347 for set in ${options}; do
 348   for opt in `echo ${set} | sed -e 's_[/|]_ _'g`; do
 349     echo "\"${opt} ${opt};\","
 350   done
 351 done
 352 echo "NULL"
 353 echo "};"
 354
 355 # Output the default options now
 356 echo ""
 357 echo "static const char *multilib_extra = \"${extra}\";"
 358
 359 # Output the exclusion rules now
 360 echo ""
 361 echo "static const char *const multilib_exclusions_raw[] = {"
 362 for rule in ${exclusions}; do
 363   s=`echo ${rule} | sed -e 's,/, ,g'`
 364   echo "\"${s};\","
 365 done
 366 echo "NULL"
 367 echo "};"
 368
 369 # Output the options now
 370 moptions=`echo ${options} | sed -e 's,[         ][      ]*, ,g'`
 371 echo ""
 372 echo "static const char *multilib_options = \"${moptions}\";"
 373
 374 cd ..
 375 rm -r tmpmultilib.$$
 376
 377 exit 0