gcc/genmultilib

   1 #!/bin/sh
   2 # Generates multilib.h.
   3 #   Copyright (C) 1994, 1995, 1996, 1997, 1999, 2002, 2007, 2012
   4 #   Free Software Foundation, Inc.
   5
   6 #This file is part of GCC.
   7
   8 #GCC is free software; you can redistribute it and/or modify it under
   9 #the terms of the GNU General Public License as published by the Free
  10 #Software Foundation; either version 3, or (at your option) any later
  11 #version.
  12
  13 #GCC is distributed in the hope that it will be useful, but WITHOUT
  14 #ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  15 #FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  16 #for more details.
  17
  18 #You should have received a copy of the GNU General Public License
  19 #along with GCC; see the file COPYING3.  If not see
  20 #<http://www.gnu.org/licenses/>.
  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 seventh argument is a list of OS subdirectory names.
  67 # The format is either the same as of the second argument, or a set of
  68 # mappings. When it is the same as the second argument, it describes
  69 # the multilib directories using OS conventions, rather than GCC
  70 # conventions.  When it is a set of mappings of the form gccdir=osdir,
  71 # the left side gives the GCC convention and the right gives the
  72 # equivalent OS defined location.  If the osdir part begins with a !,
  73 # the os directory names are used exclusively.  Use the mapping when
  74 # there is no one-to-one equivalence between GCC levels and the OS.
  75
  76 # The optional eighth argument which intends to reduce the effort to write
  77 # so many MULTILIB_EXCEPTIONS rules. This option defines a series of option
  78 # combinations that we actually required.
  79 # For some cases, the generated option combinations are far more than what
  80 # we need, we have to write a lot of rules to screen out combinations we
  81 # don't need. If we missed some rules, the unexpected libraries will be built.
  82 # Now with this argument, one can simply give what combinations are needed.
  83 # It is pretty straigtforward.
  84 # This argument can be used together with MULTILIB_EXCEPTIONS and will take
  85 # effect after the MULTILIB_EXCEPTIONS.
  86
  87 # The optional ninth argument is the multiarch name.
  88
  89 # The last option should be "yes" if multilibs are enabled.  If it is not
  90 # "yes", all GCC multilib dir names will be ".".
  91
  92 # The output looks like
  93 #   #define MULTILIB_MATCHES "\
  94 #   SUBDIRECTORY OPTIONS;\
  95 #   ...
  96 #   "
  97 # The SUBDIRECTORY is the subdirectory to use.  The OPTIONS are
  98 # multiple options separated by spaces.  Each option may start with an
  99 # exclamation point.  gcc will consider each line in turn.  If none of
 100 # the options beginning with an exclamation point are present, and all
 101 # of the other options are present, that subdirectory will be used.
 102 # The order of the subdirectories is such that they can be created in
 103 # order; that is, a subdirectory is preceded by all its parents.
 104
 105 # Here is an example (this is from the actual sparc64 case):
 106 #   genmultilib 'm64/m32 mno-app-regs|mcmodel=medany' '64 32 alt'
 107 #               'mcmodel?medany=mcmodel?medmid' 'm32/mno-app-regs* m32/mcmodel=*'
 108 #               '' 'm32/!m64/mno-app-regs m32/!m64/mcmodel=medany'
 109 #               '../lib64 ../lib32 alt' '' yes
 110 # This produces:
 111 #   ". !m64 !m32 !mno-app-regs !mcmodel=medany;",
 112 #   "64:../lib64 m64 !m32 !mno-app-regs !mcmodel=medany;",
 113 #   "32:../lib32 !m64 m32 !mno-app-regs !mcmodel=medany;",
 114 #   "alt !m64 !m32 mno-app-regs mcmodel=medany;",
 115 #   "alt !m64 !m32 mno-app-regs !mcmodel=medany;",
 116 #   "alt !m64 !m32 !mno-app-regs mcmodel=medany;",
 117 #   "64/alt:../lib64/alt m64 !m32 mno-app-regs mcmodel=medany;",
 118 #   "64/alt:../lib64/alt m64 !m32 mno-app-regs !mcmodel=medany;",
 119 #   "64/alt:../lib64/alt m64 !m32 !mno-app-regs mcmodel=medany;",
 120 #
 121 # The effect is that `gcc -mno-app-regs' (for example) will append "alt"
 122 # to the directory name when searching for libraries or startup files and
 123 # `gcc -m32 -mcmodel=medany' (for example) will append "32/alt". Also note
 124 # that exclusion above is moot, unless the compiler had a default of -m32,
 125 # which would mean that all of the "alt" directories (not the 64/alt ones)
 126 # would be ignored (not generated, nor used) since the exclusion also
 127 # matches the multilib_default args.
 128
 129 # Copy the positional parameters into variables.
 130 options=$1
 131 dirnames=$2
 132 matches=$3
 133 exceptions=$4
 134 extra=$5
 135 exclusions=$6
 136 osdirnames=$7
 137 multilib_required=$8
 138 multiarch=$9
 139 enable_multilib=${10}
 140
 141 echo "static const char *const multilib_raw[] = {"
 142
 143 mkdir tmpmultilib.$$ || exit 1
 144 # Use cd ./foo to avoid CDPATH output.
 145 cd ./tmpmultilib.$$ || exit 1
 146
 147 # What we want to do is select all combinations of the sets in
 148 # options.  Each combination which includes a set of mutually
 149 # exclusive options must then be output multiple times, once for each
 150 # item in the set.  Selecting combinations is a recursive process.
 151 # Since not all versions of sh support functions, we achieve recursion
 152 # by creating a temporary shell script which invokes itself.
 153 rm -f tmpmultilib
 154 cat >tmpmultilib <<\EOF
 155 #!/bin/sh
 156 # This recursive script basically outputs all combinations of its
 157 # input arguments, handling mutually exclusive sets of options by
 158 # repetition.  When the script is called, ${initial} is the list of
 159 # options which should appear before all combinations this will
 160 # output.  The output looks like a list of subdirectory names with
 161 # leading and trailing slashes.
 162 if [ "$#" != "0" ]; then
 163   first=$1
 164   shift
 165   case "$first" in
 166   *\|*)
 167     all=${initial}`echo $first | sed -e 's_|_/_'g`
 168     first=`echo $first | sed -e 's_|_ _'g`
 169     echo ${all}/
 170     initial="${initial}${all}/" ./tmpmultilib $@
 171     ./tmpmultilib $first $@ | grep -v "^${all}"
 172     ;;
 173   *)
 174     for opt in `echo $first | sed -e 's|/| |'g`; do
 175       echo ${initial}${opt}/
 176     done
 177     ./tmpmultilib $@
 178     for opt in `echo $first | sed -e 's|/| |'g`; do
 179       initial="${initial}${opt}/" ./tmpmultilib $@
 180     done
 181   esac
 182 fi
 183 EOF
 184 chmod +x tmpmultilib
 185
 186 combinations=`initial=/ ./tmpmultilib ${options}`
 187
 188 # If there exceptions, weed them out now
 189 if [ -n "${exceptions}" ]; then
 190   cat >tmpmultilib2 <<\EOF
 191 #!/bin/sh
 192 # This recursive script weeds out any combination of multilib
 193 # switches that should not be generated.  The output looks like
 194 # a list of subdirectory names with leading and trailing slashes.
 195
 196   for opt in $@; do
 197     case "$opt" in
 198 EOF
 199
 200   for except in ${exceptions}; do
 201     echo "      /${except}/) : ;;" >> tmpmultilib2
 202   done
 203
 204 cat >>tmpmultilib2 <<\EOF
 205       *) echo ${opt};;
 206     esac
 207   done
 208 EOF
 209   chmod +x tmpmultilib2
 210   combinations=`./tmpmultilib2 ${combinations}`
 211 fi
 212
 213 # If the MULTILIB_REQUIRED list are provided,
 214 # filter out combinations not in this list.
 215 if [ -n "${multilib_required}" ]; then
 216   cat >tmpmultilib2 <<\EOF
 217 #!/bin/sh
 218 # This recursive script weeds out any combination of multilib
 219 # switches that not in the expected list.
 220
 221   for opt in $@; do
 222     case "$opt" in
 223 EOF
 224
 225   for expect in ${multilib_required}; do
 226     echo "      /${expect}/) echo \${opt};;" >> tmpmultilib2
 227   done
 228
 229 cat >>tmpmultilib2 <<\EOF
 230       *) ;;
 231     esac
 232   done
 233 EOF
 234
 235    chmod +x tmpmultilib2
 236    combinations=`./tmpmultilib2 ${combinations}`
 237
 238 fi
 239
 240 # Construct a sed pattern which will convert option names to directory
 241 # names.
 242 todirnames=
 243 if [ -n "${dirnames}" ]; then
 244   set x ${dirnames}
 245   shift
 246   for set in ${options}; do
 247     for opts in `echo ${set} | sed -e 's|/| |'g`; do
 248       patt="/"
 249       for opt in `echo ${opts} | sed -e 's_|_ _'g`; do
 250         if [ "$1" != "${opt}" ]; then
 251           todirnames="${todirnames} -e s|/${opt}/|/${1}/|g"
 252           patt="${patt}${1}/"
 253           if [ "${patt}" != "/${1}/" ]; then
 254             todirnames="${todirnames} -e s|${patt}|/${1}/|g"
 255           fi
 256         fi
 257       done
 258       shift
 259     done
 260   done
 261 fi
 262
 263 # Construct a sed pattern which will convert option names to OS directory
 264 # names.
 265 toosdirnames=
 266 defaultosdirname=
 267 if [ -n "${multiarch}" ]; then
 268   defaultosdirname=::${multiarch}
 269 fi
 270 if [ -n "${osdirnames}" ]; then
 271   set x ${osdirnames}
 272   shift
 273   while [ $# != 0 ] ; do
 274     case "$1" in
 275       .=*)
 276         defaultosdirname=`echo $1 | sed 's|^.=|:|'`
 277         if [ -n "${multiarch}" ]; then
 278           defaultosdirname=${defaultosdirname}:${multiarch}
 279         fi
 280         shift
 281         ;;
 282       *=*)
 283         patt=`echo $1 | sed -e 's|=|/$=/|'`
 284         toosdirnames="${toosdirnames} -e s=^/${patt}/="
 285         shift
 286         ;;
 287       *)
 288         break
 289         ;;
 290     esac
 291   done
 292
 293   if [ $# != 0 ]; then
 294     for set in ${options}; do
 295       for opts in `echo ${set} | sed -e 's|/| |'g`; do
 296         patt="/"
 297         for opt in `echo ${opts} | sed -e 's_|_ _'g`; do
 298           if [ "$1" != "${opt}" ]; then
 299             toosdirnames="${toosdirnames} -e s|/${opt}/|/${1}/|g"
 300             patt="${patt}${1}/"
 301             if [ "${patt}" != "/${1}/" ]; then
 302               toosdirnames="${toosdirnames} -e s|${patt}|/${1}/|g"
 303             fi
 304           fi
 305         done
 306         shift
 307       done
 308     done
 309   fi
 310 fi
 311
 312 # We need another recursive shell script to correctly handle positive
 313 # matches.  If we are invoked as
 314 #   genmultilib "opt1 opt2" "" "opt1=nopt1 opt2=nopt2"
 315 # we must output
 316 #   opt1/opt2 opt1 opt2
 317 #   opt1/opt2 nopt1 opt2
 318 #   opt1/opt2 opt1 nopt2
 319 #   opt1/opt2 nopt1 nopt2
 320 # In other words, we must output all combinations of matches.
 321 rm -f tmpmultilib2
 322 cat >tmpmultilib2 <<\EOF
 323 #!/bin/sh
 324 # The positional parameters are a list of matches to consider.
 325 # ${dirout} is the directory name and ${optout} is the current list of
 326 # options.
 327 if [ "$#" = "0" ]; then
 328   echo "\"${dirout} ${optout};\","
 329 else
 330   first=$1
 331   shift
 332   dirout="${dirout}" optout="${optout}" ./tmpmultilib2 $@
 333   l=`echo ${first} | sed -e 's/=.*$//' -e 's/?/=/g'`
 334   r=`echo ${first} | sed -e 's/^.*=//' -e 's/?/=/g'`
 335   if expr " ${optout} " : ".* ${l} .*" > /dev/null; then
 336     newopt=`echo " ${optout} " | sed -e "s/ ${l} / ${r} /" -e 's/^ //' -e 's/ $//'`
 337     dirout="${dirout}" optout="${newopt}" ./tmpmultilib2 $@
 338   fi
 339 fi
 340 EOF
 341 chmod +x tmpmultilib2
 342
 343 # Start with the current directory, which includes only negations.
 344 optout=
 345 for set in ${options}; do
 346   for opt in `echo ${set} | sed -e 's_[/|]_ _g'`; do
 347     optout="${optout} !${opt}"
 348   done
 349 done
 350 optout=`echo ${optout} | sed -e 's/^ //'`
 351 echo "\".${defaultosdirname} ${optout};\","
 352
 353 # Work over the list of combinations.  We have to translate each one
 354 # to use the directory names rather than the option names, we have to
 355 # include the information in matches, and we have to generate the
 356 # correct list of options and negations.
 357 for combo in ${combinations}; do
 358   # Use the directory names rather than the option names.
 359   if [ -n "${todirnames}" ]; then
 360     dirout=`echo ${combo} | sed ${todirnames}`
 361   else
 362     dirout=`echo ${combo} | sed -e 's/=/-/g'`
 363   fi
 364   # Remove the leading and trailing slashes.
 365   dirout=`echo ${dirout} | sed -e 's|^/||' -e 's|/*:/*|:|' -e 's|/$||g'`
 366
 367   # Use the OS directory names rather than the option names.
 368   if [ -n "${toosdirnames}" ]; then
 369     osdirout=`echo ${combo} | sed ${toosdirnames}`
 370     # Remove the leading and trailing slashes.
 371     osdirout=`echo ${osdirout} | sed -e 's|^/||' -e 's|/*:/*|:|' -e 's|/$||g'`
 372     if [ "x${enable_multilib}" != xyes ]; then
 373       dirout=".:${osdirout}"
 374       disable_multilib=yes
 375     else
 376       case "${osdirout}" in
 377         !*)
 378           dirout=`echo ${osdirout} | sed 's/^!//'`
 379           ;;
 380         *)
 381           dirout="${dirout}:${osdirout}"
 382           ;;
 383       esac
 384     fi
 385   else
 386     if [ "x${enable_multilib}" != xyes ]; then
 387       # genmultilib with --disable-multilib should be
 388       # called with '' '' '' '' '' '' '' no
 389       # if MULTILIB_OSDIRNAMES is empty.
 390       exit 1
 391     fi
 392   fi
 393
 394   # Look through the options.  We must output each option that is
 395   # present, and negate each option that is not present.
 396   optout=
 397   for set in ${options}; do
 398     setopts=`echo ${set} | sed -e 's_[/|]_ _g'`
 399     for opt in ${setopts}; do
 400       if expr "${combo} " : ".*/${opt}/.*" > /dev/null; then
 401         optout="${optout} ${opt}"
 402       else
 403         optout="${optout} !${opt}"
 404       fi
 405     done
 406   done
 407   optout=`echo ${optout} | sed -e 's/^ //'`
 408
 409   # Output the line with all appropriate matches.
 410   dirout="${dirout}" optout="${optout}" ./tmpmultilib2
 411 done
 412
 413 # Terminate the list of string.
 414 echo "NULL"
 415 echo "};"
 416
 417 # Output all of the matches now as option and that is the same as that, with
 418 # a semicolon trailer.  Include all of the normal options as well.
 419 # Note, the format of the matches is reversed compared
 420 # to what we want, so switch them around.
 421 echo ""
 422 echo "static const char *const multilib_matches_raw[] = {"
 423 for match in ${matches}; do
 424   l=`echo ${match} | sed -e 's/=.*$//' -e 's/?/=/g'`
 425   r=`echo ${match} | sed -e 's/^.*=//' -e 's/?/=/g'`
 426   echo "\"${r} ${l};\","
 427 done
 428 for set in ${options}; do
 429   for opt in `echo ${set} | sed -e 's_[/|]_ _'g`; do
 430     echo "\"${opt} ${opt};\","
 431   done
 432 done
 433 echo "NULL"
 434 echo "};"
 435
 436 # Output the default options now
 437 echo ""
 438 echo "static const char *multilib_extra = \"${extra}\";"
 439
 440 # Output the exclusion rules now
 441 echo ""
 442 echo "static const char *const multilib_exclusions_raw[] = {"
 443 for rule in ${exclusions}; do
 444   s=`echo ${rule} | sed -e 's,/, ,g'`
 445   echo "\"${s};\","
 446 done
 447 echo "NULL"
 448 echo "};"
 449
 450 # Output the options now
 451 moptions=`echo ${options} | sed -e 's,[         ][      ]*, ,g'`
 452 echo ""
 453 echo "static const char *multilib_options = \"${moptions}\";"
 454
 455 # Finally output the disable flag if specified
 456 if [ "x${disable_multilib}" = xyes ]; then
 457   echo ""
 458   echo "#define DISABLE_MULTILIB  1"
 459 fi
 460
 461 cd ..
 462 rm -r tmpmultilib.$$
 463
 464 exit 0