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.$$ || exit 1
 124 cd tmpmultilib.$$ || exit 1
 125
 126 # What we want to do is select all combinations of the sets in
 127 # options.  Each combination which includes a set of mutually
 128 # exclusive options must then be output multiple times, once for each
 129 # item in the set.  Selecting combinations is a recursive process.
 130 # Since not all versions of sh support functions, we achieve recursion
 131 # by creating a temporary shell script which invokes itself.
 132 rm -f tmpmultilib
 133 cat >tmpmultilib <<\EOF
 134 #!/bin/sh
 135 # This recursive script basically outputs all combinations of its
 136 # input arguments, handling mutually exclusive sets of options by
 137 # repetition.  When the script is called, ${initial} is the list of
 138 # options which should appear before all combinations this will
 139 # output.  The output looks like a list of subdirectory names with
 140 # leading and trailing slashes.
 141 if [ "$#" != "0" ]; then
 142   first=$1
 143   shift
 144   case "$first" in
 145   *\|*)
 146     all=${initial}`echo $first | sed -e 's_|_/_'g`
 147     first=`echo $first | sed -e 's_|_ _'g`
 148     echo ${all}/
 149     initial="${initial}${all}/" ./tmpmultilib $@
 150     ./tmpmultilib $first $@ | grep -v "^${all}"
 151     ;;
 152   *)
 153     for opt in `echo $first | sed -e 's|/| |'g`; do
 154       echo ${initial}${opt}/
 155     done
 156     ./tmpmultilib $@
 157     for opt in `echo $first | sed -e 's|/| |'g`; do
 158       initial="${initial}${opt}/" ./tmpmultilib $@
 159     done
 160   esac
 161 fi
 162 EOF
 163 chmod +x tmpmultilib
 164
 165 combinations=`initial=/ ./tmpmultilib ${options}`
 166
 167 # If there exceptions, weed them out now
 168 if [ -n "${exceptions}" ]; then
 169   cat >tmpmultilib2 <<\EOF
 170 #!/bin/sh
 171 # This recursive script weeds out any combination of multilib
 172 # switches that should not be generated.  The output looks like
 173 # a list of subdirectory names with leading and trailing slashes.
 174
 175   for opt in $@; do
 176     case "$opt" in
 177 EOF
 178
 179   for except in ${exceptions}; do
 180     echo "      /${except}/) : ;;" >> tmpmultilib2
 181   done
 182
 183 cat >>tmpmultilib2 <<\EOF
 184       *) echo ${opt};;
 185     esac
 186   done
 187 EOF
 188   chmod +x tmpmultilib2
 189   combinations=`./tmpmultilib2 ${combinations}`
 190 fi
 191
 192 # Construct a sed pattern which will convert option names to directory
 193 # names.
 194 todirnames=
 195 if [ -n "${dirnames}" ]; then
 196   set x ${dirnames}
 197   shift
 198   for set in ${options}; do
 199     for opts in `echo ${set} | sed -e 's|/| |'g`; do
 200       patt="/"
 201       for opt in `echo ${opts} | sed -e 's_|_ _'g`; do
 202         if [ "$1" != "${opt}" ]; then
 203           todirnames="${todirnames} -e s|/${opt}/|/${1}/|g"
 204           patt="${patt}${1}/"
 205           if [ "${patt}" != "/${1}/" ]; then
 206             todirnames="${todirnames} -e s|${patt}|/${1}/|g"
 207           fi
 208         fi
 209       done
 210       shift
 211     done
 212   done
 213 fi
 214
 215 # Construct a sed pattern which will convert option names to OS directory
 216 # names.
 217 toosdirnames=
 218 if [ -n "${osdirnames}" ]; then
 219   set x ${osdirnames}
 220   shift
 221   for set in ${options}; do
 222     for opts in `echo ${set} | sed -e 's|/| |'g`; do
 223       patt="/"
 224       for opt in `echo ${opts} | sed -e 's_|_ _'g`; do
 225         if [ "$1" != "${opt}" ]; then
 226           toosdirnames="${toosdirnames} -e s|/${opt}/|/${1}/|g"
 227           patt="${patt}${1}/"
 228           if [ "${patt}" != "/${1}/" ]; then
 229             toosdirnames="${toosdirnames} -e s|${patt}|/${1}/|g"
 230           fi
 231         fi
 232       done
 233       shift
 234     done
 235   done
 236 fi
 237
 238 # We need another recursive shell script to correctly handle positive
 239 # matches.  If we are invoked as
 240 #   genmultilib "opt1 opt2" "" "opt1=nopt1 opt2=nopt2"
 241 # we must output
 242 #   opt1/opt2 opt1 opt2
 243 #   opt1/opt2 nopt1 opt2
 244 #   opt1/opt2 opt1 nopt2
 245 #   opt1/opt2 nopt1 nopt2
 246 # In other words, we must output all combinations of matches.
 247 rm -f tmpmultilib2
 248 cat >tmpmultilib2 <<\EOF
 249 #!/bin/sh
 250 # The positional parameters are a list of matches to consider.
 251 # ${dirout} is the directory name and ${optout} is the current list of
 252 # options.
 253 if [ "$#" = "0" ]; then
 254   echo "\"${dirout} ${optout};\","
 255 else
 256   first=$1
 257   shift
 258   dirout="${dirout}" optout="${optout}" ./tmpmultilib2 $@
 259   l=`echo ${first} | sed -e 's/=.*$//' -e 's/?/=/g'`
 260   r=`echo ${first} | sed -e 's/^.*=//' -e 's/?/=/g'`
 261   if expr " ${optout} " : ".* ${l} .*" > /dev/null; then
 262     newopt=`echo " ${optout} " | sed -e "s/ ${l} / ${r} /" -e 's/^ //' -e 's/ $//'`
 263     dirout="${dirout}" optout="${newopt}" ./tmpmultilib2 $@
 264   fi
 265 fi
 266 EOF
 267 chmod +x tmpmultilib2
 268
 269 # Start with the current directory, which includes only negations.
 270 optout=
 271 for set in ${options}; do
 272   for opt in `echo ${set} | sed -e 's_[/|]_ _g'`; do
 273     optout="${optout} !${opt}"
 274   done
 275 done
 276 optout=`echo ${optout} | sed -e 's/^ //'`
 277 echo "\". ${optout};\","
 278
 279 # Work over the list of combinations.  We have to translate each one
 280 # to use the directory names rather than the option names, we have to
 281 # include the information in matches, and we have to generate the
 282 # correct list of options and negations.
 283 for combo in ${combinations}; do
 284   # Use the directory names rather than the option names.
 285   if [ -n "${todirnames}" ]; then
 286     dirout=`echo ${combo} | sed ${todirnames}`
 287   else
 288     dirout=${combo}
 289   fi
 290   # Remove the leading and trailing slashes.
 291   dirout=`echo ${dirout} | sed -e 's|^/||' -e 's|/$||g'`
 292
 293   # Use the OS directory names rather than the option names.
 294   if [ -n "${toosdirnames}" ]; then
 295     osdirout=`echo ${combo} | sed ${toosdirnames}`
 296     # Remove the leading and trailing slashes.
 297     osdirout=`echo ${osdirout} | sed -e 's|^/||' -e 's|/$||g'`
 298     if [ "x${enable_multilib}" != xyes ]; then
 299       dirout=".:${osdirout}"
 300     else
 301       dirout="${dirout}:${osdirout}"
 302     fi
 303   else
 304     if [ "x${enable_multilib}" != xyes ]; then
 305       # genmultilib with --disable-multilib should be
 306       # called with '' '' '' '' '' '' '' no
 307       # if MULTILIB_OSDIRNAMES is empty.
 308       exit 1
 309     fi
 310   fi
 311
 312   # Look through the options.  We must output each option that is
 313   # present, and negate each option that is not present.
 314   optout=
 315   for set in ${options}; do
 316     setopts=`echo ${set} | sed -e 's_[/|]_ _g'`
 317     for opt in ${setopts}; do
 318       if expr "${combo} " : ".*/${opt}/.*" > /dev/null; then
 319         optout="${optout} ${opt}"
 320       else
 321         optout="${optout} !${opt}"
 322       fi
 323     done
 324   done
 325   optout=`echo ${optout} | sed -e 's/^ //'`
 326
 327   # Output the line with all appropriate matches.
 328   dirout="${dirout}" optout="${optout}" ./tmpmultilib2
 329 done
 330
 331 # Terminate the list of string.
 332 echo "NULL"
 333 echo "};"
 334
 335 # Output all of the matches now as option and that is the same as that, with
 336 # a semicolon trailer.  Include all of the normal options as well.
 337 # Note, the format of the matches is reversed compared
 338 # to what we want, so switch them around.
 339 echo ""
 340 echo "static const char *const multilib_matches_raw[] = {"
 341 for match in ${matches}; do
 342   l=`echo ${match} | sed -e 's/=.*$//' -e 's/?/=/g'`
 343   r=`echo ${match} | sed -e 's/^.*=//' -e 's/?/=/g'`
 344   echo "\"${r} ${l};\","
 345 done
 346 for set in ${options}; do
 347   for opt in `echo ${set} | sed -e 's_[/|]_ _'g`; do
 348     echo "\"${opt} ${opt};\","
 349   done
 350 done
 351 echo "NULL"
 352 echo "};"
 353
 354 # Output the default options now
 355 echo ""
 356 echo "static const char *multilib_extra = \"${extra}\";"
 357
 358 # Output the exclusion rules now
 359 echo ""
 360 echo "static const char *const multilib_exclusions_raw[] = {"
 361 for rule in ${exclusions}; do
 362   s=`echo ${rule} | sed -e 's,/, ,g'`
 363   echo "\"${s};\","
 364 done
 365 echo "NULL"
 366 echo "};"
 367
 368 # Output the options now
 369 moptions=`echo ${options} | sed -e 's,[         ][      ]*, ,g'`
 370 echo ""
 371 echo "static const char *multilib_options = \"${moptions}\";"
 372
 373 cd ..
 374 rm -r tmpmultilib.$$
 375
 376 exit 0