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