contrib/gcc-4.7/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 is the multiarch name.
  77
  78 # The last option should be "yes" if multilibs are enabled.  If it is not
  79 # "yes", all GCC multilib dir names will be ".".
  80
  81 # The output looks like
  82 #   #define MULTILIB_MATCHES "\
  83 #   SUBDIRECTORY OPTIONS;\
  84 #   ...
  85 #   "
  86 # The SUBDIRECTORY is the subdirectory to use.  The OPTIONS are
  87 # multiple options separated by spaces.  Each option may start with an
  88 # exclamation point.  gcc will consider each line in turn.  If none of
  89 # the options beginning with an exclamation point are present, and all
  90 # of the other options are present, that subdirectory will be used.
  91 # The order of the subdirectories is such that they can be created in
  92 # order; that is, a subdirectory is preceded by all its parents.
  93
  94 # Here is an example (this is from the actual sparc64 case):
  95 #   genmultilib 'm64/m32 mno-app-regs|mcmodel=medany' '64 32 alt'
  96 #               'mcmodel?medany=mcmodel?medmid' 'm32/mno-app-regs* m32/mcmodel=*'
  97 #               '' 'm32/!m64/mno-app-regs m32/!m64/mcmodel=medany'
  98 #               '../lib64 ../lib32 alt' yes
  99 # This produces:
 100 #   ". !m64 !m32 !mno-app-regs !mcmodel=medany;",
 101 #   "64:../lib64 m64 !m32 !mno-app-regs !mcmodel=medany;",
 102 #   "32:../lib32 !m64 m32 !mno-app-regs !mcmodel=medany;",
 103 #   "alt !m64 !m32 mno-app-regs mcmodel=medany;",
 104 #   "alt !m64 !m32 mno-app-regs !mcmodel=medany;",
 105 #   "alt !m64 !m32 !mno-app-regs mcmodel=medany;",
 106 #   "64/alt:../lib64/alt m64 !m32 mno-app-regs mcmodel=medany;",
 107 #   "64/alt:../lib64/alt m64 !m32 mno-app-regs !mcmodel=medany;",
 108 #   "64/alt:../lib64/alt m64 !m32 !mno-app-regs mcmodel=medany;",
 109 #
 110 # The effect is that `gcc -mno-app-regs' (for example) will append "alt"
 111 # to the directory name when searching for libraries or startup files and
 112 # `gcc -m32 -mcmodel=medany' (for example) will append "32/alt". Also note
 113 # that exclusion above is moot, unless the compiler had a default of -m32,
 114 # which would mean that all of the "alt" directories (not the 64/alt ones)
 115 # would be ignored (not generated, nor used) since the exclusion also
 116 # matches the multilib_default args.
 117
 118 # Copy the positional parameters into variables.
 119 options=$1
 120 dirnames=$2
 121 matches=$3
 122 exceptions=$4
 123 extra=$5
 124 exclusions=$6
 125 osdirnames=$7
 126 multiarch=$8
 127 enable_multilib=$9
 128
 129 echo "static const char *const multilib_raw[] = {"
 130
 131 mkdir tmpmultilib.$$ || exit 1
 132 # Use cd ./foo to avoid CDPATH output.
 133 cd ./tmpmultilib.$$ || exit 1
 134
 135 # What we want to do is select all combinations of the sets in
 136 # options.  Each combination which includes a set of mutually
 137 # exclusive options must then be output multiple times, once for each
 138 # item in the set.  Selecting combinations is a recursive process.
 139 # Since not all versions of sh support functions, we achieve recursion
 140 # by creating a temporary shell script which invokes itself.
 141 rm -f tmpmultilib
 142 cat >tmpmultilib <<\EOF
 143 #!/bin/sh
 144 # This recursive script basically outputs all combinations of its
 145 # input arguments, handling mutually exclusive sets of options by
 146 # repetition.  When the script is called, ${initial} is the list of
 147 # options which should appear before all combinations this will
 148 # output.  The output looks like a list of subdirectory names with
 149 # leading and trailing slashes.
 150 if [ "$#" != "0" ]; then
 151   first=$1
 152   shift
 153   case "$first" in
 154   *\|*)
 155     all=${initial}`echo $first | sed -e 's_|_/_'g`
 156     first=`echo $first | sed -e 's_|_ _'g`
 157     echo ${all}/
 158     initial="${initial}${all}/" ./tmpmultilib $@
 159     ./tmpmultilib $first $@ | grep -v "^${all}"
 160     ;;
 161   *)
 162     for opt in `echo $first | sed -e 's|/| |'g`; do
 163       echo ${initial}${opt}/
 164     done
 165     ./tmpmultilib $@
 166     for opt in `echo $first | sed -e 's|/| |'g`; do
 167       initial="${initial}${opt}/" ./tmpmultilib $@
 168     done
 169   esac
 170 fi
 171 EOF
 172 chmod +x tmpmultilib
 173
 174 combinations=`initial=/ ./tmpmultilib ${options}`
 175
 176 # If there exceptions, weed them out now
 177 if [ -n "${exceptions}" ]; then
 178   cat >tmpmultilib2 <<\EOF
 179 #!/bin/sh
 180 # This recursive script weeds out any combination of multilib
 181 # switches that should not be generated.  The output looks like
 182 # a list of subdirectory names with leading and trailing slashes.
 183
 184   for opt in $@; do
 185     case "$opt" in
 186 EOF
 187
 188   for except in ${exceptions}; do
 189     echo "      /${except}/) : ;;" >> tmpmultilib2
 190   done
 191
 192 cat >>tmpmultilib2 <<\EOF
 193       *) echo ${opt};;
 194     esac
 195   done
 196 EOF
 197   chmod +x tmpmultilib2
 198   combinations=`./tmpmultilib2 ${combinations}`
 199 fi
 200
 201 # Construct a sed pattern which will convert option names to directory
 202 # names.
 203 todirnames=
 204 if [ -n "${dirnames}" ]; then
 205   set x ${dirnames}
 206   shift
 207   for set in ${options}; do
 208     for opts in `echo ${set} | sed -e 's|/| |'g`; do
 209       patt="/"
 210       for opt in `echo ${opts} | sed -e 's_|_ _'g`; do
 211         if [ "$1" != "${opt}" ]; then
 212           todirnames="${todirnames} -e s|/${opt}/|/${1}/|g"
 213           patt="${patt}${1}/"
 214           if [ "${patt}" != "/${1}/" ]; then
 215             todirnames="${todirnames} -e s|${patt}|/${1}/|g"
 216           fi
 217         fi
 218       done
 219       shift
 220     done
 221   done
 222 fi
 223
 224 # Construct a sed pattern which will convert option names to OS directory
 225 # names.
 226 toosdirnames=
 227 defaultosdirname=
 228 if [ -n "${multiarch}" ]; then
 229   defaultosdirname=::${multiarch}
 230 fi
 231 if [ -n "${osdirnames}" ]; then
 232   set x ${osdirnames}
 233   shift
 234   while [ $# != 0 ] ; do
 235     case "$1" in
 236       .=*)
 237         defaultosdirname=`echo $1 | sed 's|^.=|:|'`
 238         if [ -n "${multiarch}" ]; then
 239           defaultosdirname=${defaultosdirname}:${multiarch}
 240         fi
 241         shift
 242         ;;
 243       *=*)
 244         patt=`echo $1 | sed -e 's|=|/$=/|'`
 245         toosdirnames="${toosdirnames} -e s=^/${patt}/="
 246         shift
 247         ;;
 248       *)
 249         break
 250         ;;
 251     esac
 252   done
 253
 254   if [ $# != 0 ]; then
 255     for set in ${options}; do
 256       for opts in `echo ${set} | sed -e 's|/| |'g`; do
 257         patt="/"
 258         for opt in `echo ${opts} | sed -e 's_|_ _'g`; do
 259           if [ "$1" != "${opt}" ]; then
 260             toosdirnames="${toosdirnames} -e s|/${opt}/|/${1}/|g"
 261             patt="${patt}${1}/"
 262             if [ "${patt}" != "/${1}/" ]; then
 263               toosdirnames="${toosdirnames} -e s|${patt}|/${1}/|g"
 264             fi
 265           fi
 266         done
 267         shift
 268       done
 269     done
 270   fi
 271 fi
 272
 273 # We need another recursive shell script to correctly handle positive
 274 # matches.  If we are invoked as
 275 #   genmultilib "opt1 opt2" "" "opt1=nopt1 opt2=nopt2"
 276 # we must output
 277 #   opt1/opt2 opt1 opt2
 278 #   opt1/opt2 nopt1 opt2
 279 #   opt1/opt2 opt1 nopt2
 280 #   opt1/opt2 nopt1 nopt2
 281 # In other words, we must output all combinations of matches.
 282 rm -f tmpmultilib2
 283 cat >tmpmultilib2 <<\EOF
 284 #!/bin/sh
 285 # The positional parameters are a list of matches to consider.
 286 # ${dirout} is the directory name and ${optout} is the current list of
 287 # options.
 288 if [ "$#" = "0" ]; then
 289   echo "\"${dirout} ${optout};\","
 290 else
 291   first=$1
 292   shift
 293   dirout="${dirout}" optout="${optout}" ./tmpmultilib2 $@
 294   l=`echo ${first} | sed -e 's/=.*$//' -e 's/?/=/g'`
 295   r=`echo ${first} | sed -e 's/^.*=//' -e 's/?/=/g'`
 296   if expr " ${optout} " : ".* ${l} .*" > /dev/null; then
 297     newopt=`echo " ${optout} " | sed -e "s/ ${l} / ${r} /" -e 's/^ //' -e 's/ $//'`
 298     dirout="${dirout}" optout="${newopt}" ./tmpmultilib2 $@
 299   fi
 300 fi
 301 EOF
 302 chmod +x tmpmultilib2
 303
 304 # Start with the current directory, which includes only negations.
 305 optout=
 306 for set in ${options}; do
 307   for opt in `echo ${set} | sed -e 's_[/|]_ _g'`; do
 308     optout="${optout} !${opt}"
 309   done
 310 done
 311 optout=`echo ${optout} | sed -e 's/^ //'`
 312 echo "\".${defaultosdirname} ${optout};\","
 313
 314 # Work over the list of combinations.  We have to translate each one
 315 # to use the directory names rather than the option names, we have to
 316 # include the information in matches, and we have to generate the
 317 # correct list of options and negations.
 318 for combo in ${combinations}; do
 319   # Use the directory names rather than the option names.
 320   if [ -n "${todirnames}" ]; then
 321     dirout=`echo ${combo} | sed ${todirnames}`
 322   else
 323     dirout=`echo ${combo} | sed -e 's/=/-/g'`
 324   fi
 325   # Remove the leading and trailing slashes.
 326   dirout=`echo ${dirout} | sed -e 's|^/||' -e 's|/*:/*|:|' -e 's|/$||g'`
 327
 328   # Use the OS directory names rather than the option names.
 329   if [ -n "${toosdirnames}" ]; then
 330     osdirout=`echo ${combo} | sed ${toosdirnames}`
 331     # Remove the leading and trailing slashes.
 332     osdirout=`echo ${osdirout} | sed -e 's|^/||' -e 's|/*:/*|:|' -e 's|/$||g'`
 333     if [ "x${enable_multilib}" != xyes ]; then
 334       dirout=".:${osdirout}"
 335       disable_multilib=yes
 336     else
 337       case "${osdirout}" in
 338         !*)
 339           dirout=`echo ${osdirout} | sed 's/^!//'`
 340           ;;
 341         *)
 342           dirout="${dirout}:${osdirout}"
 343           ;;
 344       esac
 345     fi
 346   else
 347     if [ "x${enable_multilib}" != xyes ]; then
 348       # genmultilib with --disable-multilib should be
 349       # called with '' '' '' '' '' '' '' no
 350       # if MULTILIB_OSDIRNAMES is empty.
 351       exit 1
 352     fi
 353   fi
 354
 355   # Look through the options.  We must output each option that is
 356   # present, and negate each option that is not present.
 357   optout=
 358   for set in ${options}; do
 359     setopts=`echo ${set} | sed -e 's_[/|]_ _g'`
 360     for opt in ${setopts}; do
 361       if expr "${combo} " : ".*/${opt}/.*" > /dev/null; then
 362         optout="${optout} ${opt}"
 363       else
 364         optout="${optout} !${opt}"
 365       fi
 366     done
 367   done
 368   optout=`echo ${optout} | sed -e 's/^ //'`
 369
 370   # Output the line with all appropriate matches.
 371   dirout="${dirout}" optout="${optout}" ./tmpmultilib2
 372 done
 373
 374 # Terminate the list of string.
 375 echo "NULL"
 376 echo "};"
 377
 378 # Output all of the matches now as option and that is the same as that, with
 379 # a semicolon trailer.  Include all of the normal options as well.
 380 # Note, the format of the matches is reversed compared
 381 # to what we want, so switch them around.
 382 echo ""
 383 echo "static const char *const multilib_matches_raw[] = {"
 384 for match in ${matches}; do
 385   l=`echo ${match} | sed -e 's/=.*$//' -e 's/?/=/g'`
 386   r=`echo ${match} | sed -e 's/^.*=//' -e 's/?/=/g'`
 387   echo "\"${r} ${l};\","
 388 done
 389 for set in ${options}; do
 390   for opt in `echo ${set} | sed -e 's_[/|]_ _'g`; do
 391     echo "\"${opt} ${opt};\","
 392   done
 393 done
 394 echo "NULL"
 395 echo "};"
 396
 397 # Output the default options now
 398 echo ""
 399 echo "static const char *multilib_extra = \"${extra}\";"
 400
 401 # Output the exclusion rules now
 402 echo ""
 403 echo "static const char *const multilib_exclusions_raw[] = {"
 404 for rule in ${exclusions}; do
 405   s=`echo ${rule} | sed -e 's,/, ,g'`
 406   echo "\"${s};\","
 407 done
 408 echo "NULL"
 409 echo "};"
 410
 411 # Output the options now
 412 moptions=`echo ${options} | sed -e 's,[         ][      ]*, ,g'`
 413 echo ""
 414 echo "static const char *multilib_options = \"${moptions}\";"
 415
 416 # Finally output the disable flag if specified
 417 if [ "x${disable_multilib}" = xyes ]; then
 418   echo ""
 419   echo "#define DISABLE_MULTILIB  1"
 420 fi
 421
 422 cd ..
 423 rm -r tmpmultilib.$$
 424
 425 exit 0