gcc/genmultilib

   1 #!/bin/sh
   2 # Generates multilib.h.
   3 #   Copyright (C) 1994, 1995, 1996, 1997, 1999, 2002, 2007
   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 last option should be "yes" if multilibs are enabled.  If it is not
  77 # "yes", all GCC multilib dir names will be ".".
  78
  79 # The output looks like
  80 #   #define MULTILIB_MATCHES "\
  81 #   SUBDIRECTORY OPTIONS;\
  82 #   ...
  83 #   "
  84 # The SUBDIRECTORY is the subdirectory to use.  The OPTIONS are
  85 # multiple options separated by spaces.  Each option may start with an
  86 # exclamation point.  gcc will consider each line in turn.  If none of
  87 # the options beginning with an exclamation point are present, and all
  88 # of the other options are present, that subdirectory will be used.
  89 # The order of the subdirectories is such that they can be created in
  90 # order; that is, a subdirectory is preceded by all its parents.
  91
  92 # Here is an example (this is from the actual sparc64 case):
  93 #   genmultilib 'm64/m32 mno-app-regs|mcmodel=medany' '64 32 alt'
  94 #               'mcmodel?medany=mcmodel?medmid' 'm32/mno-app-regs* m32/mcmodel=*'
  95 #               '' 'm32/!m64/mno-app-regs m32/!m64/mcmodel=medany'
  96 #               '../lib64 ../lib32 alt' yes
  97 # This produces:
  98 #   ". !m64 !m32 !mno-app-regs !mcmodel=medany;",
  99 #   "64:../lib64 m64 !m32 !mno-app-regs !mcmodel=medany;",
 100 #   "32:../lib32 !m64 m32 !mno-app-regs !mcmodel=medany;",
 101 #   "alt !m64 !m32 mno-app-regs mcmodel=medany;",
 102 #   "alt !m64 !m32 mno-app-regs !mcmodel=medany;",
 103 #   "alt !m64 !m32 !mno-app-regs mcmodel=medany;",
 104 #   "64/alt:../lib64/alt m64 !m32 mno-app-regs mcmodel=medany;",
 105 #   "64/alt:../lib64/alt m64 !m32 mno-app-regs !mcmodel=medany;",
 106 #   "64/alt:../lib64/alt m64 !m32 !mno-app-regs mcmodel=medany;",
 107 #
 108 # The effect is that `gcc -mno-app-regs' (for example) will append "alt"
 109 # to the directory name when searching for libraries or startup files and
 110 # `gcc -m32 -mcmodel=medany' (for example) will append "32/alt". Also note
 111 # that exclusion above is moot, unless the compiler had a default of -m32,
 112 # which would mean that all of the "alt" directories (not the 64/alt ones)
 113 # would be ignored (not generated, nor used) since the exclusion also
 114 # matches the multilib_default args.
 115
 116 # Copy the positional parameters into variables.
 117 options=$1
 118 dirnames=$2
 119 matches=$3
 120 exceptions=$4
 121 extra=$5
 122 exclusions=$6
 123 osdirnames=$7
 124 enable_multilib=$8
 125
 126 echo "static const char *const multilib_raw[] = {"
 127
 128 mkdir tmpmultilib.$$ || exit 1
 129 # Use cd ./foo to avoid CDPATH output.
 130 cd ./tmpmultilib.$$ || exit 1
 131
 132 # What we want to do is select all combinations of the sets in
 133 # options.  Each combination which includes a set of mutually
 134 # exclusive options must then be output multiple times, once for each
 135 # item in the set.  Selecting combinations is a recursive process.
 136 # Since not all versions of sh support functions, we achieve recursion
 137 # by creating a temporary shell script which invokes itself.
 138 rm -f tmpmultilib
 139 cat >tmpmultilib <<\EOF
 140 #!/bin/sh
 141 # This recursive script basically outputs all combinations of its
 142 # input arguments, handling mutually exclusive sets of options by
 143 # repetition.  When the script is called, ${initial} is the list of
 144 # options which should appear before all combinations this will
 145 # output.  The output looks like a list of subdirectory names with
 146 # leading and trailing slashes.
 147 if [ "$#" != "0" ]; then
 148   first=$1
 149   shift
 150   case "$first" in
 151   *\|*)
 152     all=${initial}`echo $first | sed -e 's_|_/_'g`
 153     first=`echo $first | sed -e 's_|_ _'g`
 154     echo ${all}/
 155     initial="${initial}${all}/" ./tmpmultilib $@
 156     ./tmpmultilib $first $@ | grep -v "^${all}"
 157     ;;
 158   *)
 159     for opt in `echo $first | sed -e 's|/| |'g`; do
 160       echo ${initial}${opt}/
 161     done
 162     ./tmpmultilib $@
 163     for opt in `echo $first | sed -e 's|/| |'g`; do
 164       initial="${initial}${opt}/" ./tmpmultilib $@
 165     done
 166   esac
 167 fi
 168 EOF
 169 chmod +x tmpmultilib
 170
 171 combinations=`initial=/ ./tmpmultilib ${options}`
 172
 173 # If there exceptions, weed them out now
 174 if [ -n "${exceptions}" ]; then
 175   cat >tmpmultilib2 <<\EOF
 176 #!/bin/sh
 177 # This recursive script weeds out any combination of multilib
 178 # switches that should not be generated.  The output looks like
 179 # a list of subdirectory names with leading and trailing slashes.
 180
 181   for opt in $@; do
 182     case "$opt" in
 183 EOF
 184
 185   for except in ${exceptions}; do
 186     echo "      /${except}/) : ;;" >> tmpmultilib2
 187   done
 188
 189 cat >>tmpmultilib2 <<\EOF
 190       *) echo ${opt};;
 191     esac
 192   done
 193 EOF
 194   chmod +x tmpmultilib2
 195   combinations=`./tmpmultilib2 ${combinations}`
 196 fi
 197
 198 # Construct a sed pattern which will convert option names to directory
 199 # names.
 200 todirnames=
 201 if [ -n "${dirnames}" ]; then
 202   set x ${dirnames}
 203   shift
 204   for set in ${options}; do
 205     for opts in `echo ${set} | sed -e 's|/| |'g`; do
 206       patt="/"
 207       for opt in `echo ${opts} | sed -e 's_|_ _'g`; do
 208         if [ "$1" != "${opt}" ]; then
 209           todirnames="${todirnames} -e s|/${opt}/|/${1}/|g"
 210           patt="${patt}${1}/"
 211           if [ "${patt}" != "/${1}/" ]; then
 212             todirnames="${todirnames} -e s|${patt}|/${1}/|g"
 213           fi
 214         fi
 215       done
 216       shift
 217     done
 218   done
 219 fi
 220
 221 # Construct a sed pattern which will convert option names to OS directory
 222 # names.
 223 toosdirnames=
 224 defaultosdirname=
 225 if [ -n "${osdirnames}" ]; then
 226   set x ${osdirnames}
 227   shift
 228   while [ $# != 0 ] ; do
 229     case "$1" in
 230       .=*)
 231         defaultosdirname=`echo $1 | sed 's|^.=|:|'`
 232         shift
 233         ;;
 234       *=*)
 235         patt=`echo $1 | sed -e 's|=|/$=/|'`
 236         toosdirnames="${toosdirnames} -e s=^/${patt}/="
 237         shift
 238         ;;
 239       *)
 240         break
 241         ;;
 242     esac
 243   done
 244
 245   if [ $# != 0 ]; then
 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             toosdirnames="${toosdirnames} -e s|/${opt}/|/${1}/|g"
 252             patt="${patt}${1}/"
 253             if [ "${patt}" != "/${1}/" ]; then
 254               toosdirnames="${toosdirnames} -e s|${patt}|/${1}/|g"
 255             fi
 256           fi
 257         done
 258         shift
 259       done
 260     done
 261   fi
 262 fi
 263
 264 # We need another recursive shell script to correctly handle positive
 265 # matches.  If we are invoked as
 266 #   genmultilib "opt1 opt2" "" "opt1=nopt1 opt2=nopt2"
 267 # we must output
 268 #   opt1/opt2 opt1 opt2
 269 #   opt1/opt2 nopt1 opt2
 270 #   opt1/opt2 opt1 nopt2
 271 #   opt1/opt2 nopt1 nopt2
 272 # In other words, we must output all combinations of matches.
 273 rm -f tmpmultilib2
 274 cat >tmpmultilib2 <<\EOF
 275 #!/bin/sh
 276 # The positional parameters are a list of matches to consider.
 277 # ${dirout} is the directory name and ${optout} is the current list of
 278 # options.
 279 if [ "$#" = "0" ]; then
 280   echo "\"${dirout} ${optout};\","
 281 else
 282   first=$1
 283   shift
 284   dirout="${dirout}" optout="${optout}" ./tmpmultilib2 $@
 285   l=`echo ${first} | sed -e 's/=.*$//' -e 's/?/=/g'`
 286   r=`echo ${first} | sed -e 's/^.*=//' -e 's/?/=/g'`
 287   if expr " ${optout} " : ".* ${l} .*" > /dev/null; then
 288     newopt=`echo " ${optout} " | sed -e "s/ ${l} / ${r} /" -e 's/^ //' -e 's/ $//'`
 289     dirout="${dirout}" optout="${newopt}" ./tmpmultilib2 $@
 290   fi
 291 fi
 292 EOF
 293 chmod +x tmpmultilib2
 294
 295 # Start with the current directory, which includes only negations.
 296 optout=
 297 for set in ${options}; do
 298   for opt in `echo ${set} | sed -e 's_[/|]_ _g'`; do
 299     optout="${optout} !${opt}"
 300   done
 301 done
 302 optout=`echo ${optout} | sed -e 's/^ //'`
 303 echo "\".${defaultosdirname} ${optout};\","
 304
 305 # Work over the list of combinations.  We have to translate each one
 306 # to use the directory names rather than the option names, we have to
 307 # include the information in matches, and we have to generate the
 308 # correct list of options and negations.
 309 for combo in ${combinations}; do
 310   # Use the directory names rather than the option names.
 311   if [ -n "${todirnames}" ]; then
 312     dirout=`echo ${combo} | sed ${todirnames}`
 313   else
 314     dirout=`echo ${combo} | sed -e 's/=/-/g'`
 315   fi
 316   # Remove the leading and trailing slashes.
 317   dirout=`echo ${dirout} | sed -e 's|^/||' -e 's|/$||g'`
 318
 319   # Use the OS directory names rather than the option names.
 320   if [ -n "${toosdirnames}" ]; then
 321     osdirout=`echo ${combo} | sed ${toosdirnames}`
 322     # Remove the leading and trailing slashes.
 323     osdirout=`echo ${osdirout} | sed -e 's|^/||' -e 's|/$||g'`
 324     if [ "x${enable_multilib}" != xyes ]; then
 325       dirout=".:${osdirout}"
 326       disable_multilib=yes
 327     else
 328       case "${osdirout}" in
 329         !*)
 330           dirout=`echo ${osdirout} | sed 's/^!//'`
 331           ;;
 332         *)
 333           dirout="${dirout}:${osdirout}"
 334           ;;
 335       esac
 336     fi
 337   else
 338     if [ "x${enable_multilib}" != xyes ]; then
 339       # genmultilib with --disable-multilib should be
 340       # called with '' '' '' '' '' '' '' no
 341       # if MULTILIB_OSDIRNAMES is empty.
 342       exit 1
 343     fi
 344   fi
 345
 346   # Look through the options.  We must output each option that is
 347   # present, and negate each option that is not present.
 348   optout=
 349   for set in ${options}; do
 350     setopts=`echo ${set} | sed -e 's_[/|]_ _g'`
 351     for opt in ${setopts}; do
 352       if expr "${combo} " : ".*/${opt}/.*" > /dev/null; then
 353         optout="${optout} ${opt}"
 354       else
 355         optout="${optout} !${opt}"
 356       fi
 357     done
 358   done
 359   optout=`echo ${optout} | sed -e 's/^ //'`
 360
 361   # Output the line with all appropriate matches.
 362   dirout="${dirout}" optout="${optout}" ./tmpmultilib2
 363 done
 364
 365 # Terminate the list of string.
 366 echo "NULL"
 367 echo "};"
 368
 369 # Output all of the matches now as option and that is the same as that, with
 370 # a semicolon trailer.  Include all of the normal options as well.
 371 # Note, the format of the matches is reversed compared
 372 # to what we want, so switch them around.
 373 echo ""
 374 echo "static const char *const multilib_matches_raw[] = {"
 375 for match in ${matches}; do
 376   l=`echo ${match} | sed -e 's/=.*$//' -e 's/?/=/g'`
 377   r=`echo ${match} | sed -e 's/^.*=//' -e 's/?/=/g'`
 378   echo "\"${r} ${l};\","
 379 done
 380 for set in ${options}; do
 381   for opt in `echo ${set} | sed -e 's_[/|]_ _'g`; do
 382     echo "\"${opt} ${opt};\","
 383   done
 384 done
 385 echo "NULL"
 386 echo "};"
 387
 388 # Output the default options now
 389 echo ""
 390 echo "static const char *multilib_extra = \"${extra}\";"
 391
 392 # Output the exclusion rules now
 393 echo ""
 394 echo "static const char *const multilib_exclusions_raw[] = {"
 395 for rule in ${exclusions}; do
 396   s=`echo ${rule} | sed -e 's,/, ,g'`
 397   echo "\"${s};\","
 398 done
 399 echo "NULL"
 400 echo "};"
 401
 402 # Output the options now
 403 moptions=`echo ${options} | sed -e 's,[         ][      ]*, ,g'`
 404 echo ""
 405 echo "static const char *multilib_options = \"${moptions}\";"
 406
 407 # Finally output the disable flag if specified
 408 if [ "x${disable_multilib}" = xyes ]; then
 409   echo ""
 410   echo "#define DISABLE_MULTILIB  1"
 411 fi
 412
 413 cd ..
 414 rm -r tmpmultilib.$$
 415
 416 exit 0