1 #!/bin/sh 2 # Generates multilib.h. 3 # Copyright (C) 1994-2022 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 3, 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 COPYING3. If not see 19 #<http://www.gnu.org/licenses/>. 20 21 # This shell script produces a header file which the gcc driver 22 # program uses to pick which library to use based on the machine 23 # specific options that it is given. 24 25 # The first argument is a list of sets of options. The elements in 26 # the list are separated by spaces. Within an element, the options 27 # are separated by slashes or pipes. No leading dash is used on the 28 # options. 29 # Each option in a set separated by slashes is mutually incompatible 30 # with all other options 31 # in the set. 32 # Each option in a set separated by pipes will be used for the library 33 # compilation and any of the options in the set will be sufficient 34 # for it to be triggered. 35 36 # The optional second argument is a list of subdirectory names. If 37 # the second argument is non-empty, there must be as many elements in 38 # the second argument as there are options in the first argument. The 39 # elements in the second list are separated by spaces. If the second 40 # argument is empty, the option names will be used as the directory 41 # names. 42 43 # The optional third argument is a list of options which are 44 # identical. The elements in the list are separated by spaces. Each 45 # element must be of the form OPTION=OPTION. The first OPTION should 46 # appear in the first argument, and the second should be a synonym for 47 # it. Question marks are replaced with equal signs in both options. 48 49 # The optional fourth argument is a list of multilib directory 50 # combinations that should not be built. 51 52 # The optional fifth argument is a list of options that should be 53 # used whenever building multilib libraries. 54 55 # The optional sixth argument is a list of exclusions used internally by 56 # the compiler similar to exceptions. The difference being that exclusions 57 # allow matching default options that genmultilib does not know about and 58 # is done at runtime as opposed to being sorted out at compile time. 59 # Each element in the list is a separate exclusion rule. Each rule is 60 # a list of options (sans preceding '-') separated by a '/'. The options 61 # on the rule are grouped as an AND operation, and all options much match 62 # for the rule to exclude a set. Options can be preceded with a '!' to 63 # match a logical NOT. 64 65 # The optional seventh argument is a list of OS subdirectory names. 66 # The format is either the same as of the second argument, or a set of 67 # mappings. When it is the same as the second argument, it describes 68 # the multilib directories using OS conventions, rather than GCC 69 # conventions. When it is a set of mappings of the form gccdir=osdir, 70 # the left side gives the GCC convention and the right gives the 71 # equivalent OS defined location. If the osdir part begins with a !, 72 # the os directory names are used exclusively. Use the mapping when 73 # there is no one-to-one equivalence between GCC levels and the OS. 74 75 # The optional eighth argument which intends to reduce the effort to write 76 # so many MULTILIB_EXCEPTIONS rules. This option defines a series of option 77 # combinations that we actually required. 78 # For some cases, the generated option combinations are far more than what 79 # we need, we have to write a lot of rules to screen out combinations we 80 # don't need. If we missed some rules, the unexpected libraries will be built. 81 # Now with this argument, one can simply give what combinations are needed. 82 # It is pretty straigtforward. 83 # This argument can be used together with MULTILIB_EXCEPTIONS and will take 84 # effect after the MULTILIB_EXCEPTIONS. 85 86 # The optional ninth argument is the multiarch name. 87 88 # The optional tenth argument specifies how to reuse multilib for different 89 # option sets. 90 91 # The last option should be "yes" if multilibs are enabled. If it is not 92 # "yes", all GCC multilib dir names will be ".". 93 94 # The output looks like 95 # #define MULTILIB_MATCHES "\ 96 # SUBDIRECTORY OPTIONS;\ 97 # ... 98 # " 99 # The SUBDIRECTORY is the subdirectory to use. The OPTIONS are 100 # multiple options separated by spaces. Each option may start with an 101 # exclamation point. gcc will consider each line in turn. If none of 102 # the options beginning with an exclamation point are present, and all 103 # of the other options are present, that subdirectory will be used. 104 # The order of the subdirectories is such that they can be created in 105 # order; that is, a subdirectory is preceded by all its parents. 106 107 # Here is an example (this is from the actual sparc64 case): 108 # genmultilib 'm64/m32 mno-app-regs|mcmodel=medany' '64 32 alt' 109 # 'mcmodel?medany=mcmodel?medmid' 'm32/mno-app-regs* m32/mcmodel=*' 110 # '' 'm32/!m64/mno-app-regs m32/!m64/mcmodel=medany' 111 # '../lib64 ../lib32 alt' '' '' '' yes 112 # This produces: 113 # ". !m64 !m32 !mno-app-regs !mcmodel=medany;", 114 # "64:../lib64 m64 !m32 !mno-app-regs !mcmodel=medany;", 115 # "32:../lib32 !m64 m32 !mno-app-regs !mcmodel=medany;", 116 # "alt !m64 !m32 mno-app-regs mcmodel=medany;", 117 # "alt !m64 !m32 mno-app-regs !mcmodel=medany;", 118 # "alt !m64 !m32 !mno-app-regs mcmodel=medany;", 119 # "64/alt:../lib64/alt m64 !m32 mno-app-regs mcmodel=medany;", 120 # "64/alt:../lib64/alt m64 !m32 mno-app-regs !mcmodel=medany;", 121 # "64/alt:../lib64/alt m64 !m32 !mno-app-regs mcmodel=medany;", 122 # 123 # The effect is that `gcc -mno-app-regs' (for example) will append "alt" 124 # to the directory name when searching for libraries or startup files and 125 # `gcc -m32 -mcmodel=medany' (for example) will append "32/alt". Also note 126 # that exclusion above is moot, unless the compiler had a default of -m32, 127 # which would mean that all of the "alt" directories (not the 64/alt ones) 128 # would be ignored (not generated, nor used) since the exclusion also 129 # matches the multilib_default args. 130 131 # Copy the positional parameters into variables. 132 options=$1 133 dirnames=$2 134 matches=$3 135 exceptions=$4 136 extra=$5 137 exclusions=$6 138 osdirnames=$7 139 multilib_required=$8 140 multiarch=$9 141 multilib_reuse=${10} 142 enable_multilib=${11} 143 144 echo "static const char *const multilib_raw[] = {" 145 146 mkdir tmpmultilib.$$ || exit 1 147 # Use cd ./foo to avoid CDPATH output. 148 cd ./tmpmultilib.$$ || exit 1 149 150 # What we want to do is select all combinations of the sets in 151 # options. Each combination which includes a set of mutually 152 # exclusive options must then be output multiple times, once for each 153 # item in the set. Selecting combinations is a recursive process. 154 # Since not all versions of sh support functions, we achieve recursion 155 # by creating a temporary shell script which invokes itself. 156 rm -f tmpmultilib 157 cat >tmpmultilib <<EOF 158 #!${CONFIG_SHELL:-/bin/sh} 159 EOF 160 cat >>tmpmultilib <<\EOF 161 # This recursive script basically outputs all combinations of its 162 # input arguments, handling mutually exclusive sets of options by 163 # repetition. When the script is called, ${initial} is the list of 164 # options which should appear before all combinations this will 165 # output. The output looks like a list of subdirectory names with 166 # leading and trailing slashes. 167 if [ "$#" != "0" ]; then 168 first=$1 169 shift 170 case "$first" in 171 *\|*) 172 all=${initial}`echo $first | sed -e 's_|_/_'g` 173 first=`echo $first | sed -e 's_|_ _'g` 174 echo ${all}/ 175 initial="${initial}${all}/" ./tmpmultilib $@ 176 ./tmpmultilib $first $@ | grep -v "^${all}" 177 ;; 178 *) 179 for opt in `echo $first | sed -e 's|/| |'g`; do 180 echo ${initial}${opt}/ 181 done 182 ./tmpmultilib $@ 183 for opt in `echo $first | sed -e 's|/| |'g`; do 184 initial="${initial}${opt}/" ./tmpmultilib $@ 185 done 186 esac 187 fi 188 EOF 189 chmod +x tmpmultilib 190 191 combinations=`initial=/ ./tmpmultilib ${options}` 192 193 # If there exceptions, weed them out now 194 if [ -n "${exceptions}" ]; then 195 cat >tmpmultilib2 <<EOF 196 #!${CONFIG_SHELL:-/bin/sh} 197 EOF 198 cat >>tmpmultilib2 <<\EOF 199 # This recursive script weeds out any combination of multilib 200 # switches that should not be generated. The output looks like 201 # a list of subdirectory names with leading and trailing slashes. 202 203 for opt in $@; do 204 case "$opt" in 205 EOF 206 207 for except in ${exceptions}; do 208 echo " /${except}/) : ;;" >> tmpmultilib2 209 done 210 211 cat >>tmpmultilib2 <<\EOF 212 *) echo ${opt};; 213 esac 214 done 215 EOF 216 chmod +x tmpmultilib2 217 combinations=`./tmpmultilib2 ${combinations}` 218 fi 219 220 # If the MULTILIB_REQUIRED list are provided, 221 # filter out combinations not in this list. 222 if [ -n "${multilib_required}" ]; then 223 cat >tmpmultilib2 <<\EOF 224 #!/bin/sh 225 # This recursive script weeds out any combination of multilib 226 # switches that not in the expected list. 227 228 for opt in $@; do 229 case "$opt" in 230 EOF 231 232 for expect in ${multilib_required}; do 233 echo " /${expect}/) echo \${opt};;" >> tmpmultilib2 234 done 235 236 cat >>tmpmultilib2 <<\EOF 237 *) ;; 238 esac 239 done 240 EOF 241 242 chmod +x tmpmultilib2 243 combinations=`./tmpmultilib2 ${combinations}` 244 245 fi 246 247 # Construct a sed pattern which will convert option names to directory 248 # names. 249 todirnames= 250 if [ -n "${dirnames}" ]; then 251 set x ${dirnames} 252 shift 253 for set in ${options}; do 254 for opts in `echo ${set} | sed -e 's|/| |'g`; do 255 patt="/" 256 for opt in `echo ${opts} | sed -e 's_|_ _'g`; do 257 if [ "$1" != "${opt}" ]; then 258 todirnames="${todirnames} -e s|/${opt}/|/${1}/|g" 259 patt="${patt}${1}/" 260 if [ "${patt}" != "/${1}/" ]; then 261 todirnames="${todirnames} -e s|${patt}|/${1}/|g" 262 fi 263 fi 264 done 265 shift 266 done 267 done 268 fi 269 270 # Construct a sed pattern which will convert option names to OS directory 271 # names. 272 toosdirnames= 273 defaultosdirname= 274 defaultosdirname2= 275 if [ -n "${multiarch}" ]; then 276 defaultosdirname=::${multiarch} 277 fi 278 if [ -n "${osdirnames}" ]; then 279 set x ${osdirnames} 280 shift 281 while [ $# != 0 ] ; do 282 case "$1" in 283 .=*) 284 defaultosdirname=`echo $1 | sed 's|^.=|:|'` 285 if [ -n "${multiarch}" ]; then 286 defaultosdirname=${defaultosdirname}:${multiarch} 287 fi 288 case "$defaultosdirname" in 289 ::*) ;; 290 *) 291 defaultosdirname2=${defaultosdirname} 292 defaultosdirname= 293 ;; 294 esac 295 shift 296 ;; 297 *=*) 298 patt=`echo $1 | sed -e 's|=|/$=/|'` 299 toosdirnames="${toosdirnames} -e s=^/${patt}/=" 300 shift 301 ;; 302 *) 303 break 304 ;; 305 esac 306 done 307 308 if [ $# != 0 ]; then 309 for set in ${options}; do 310 for opts in `echo ${set} | sed -e 's|/| |'g`; do 311 patt="/" 312 for opt in `echo ${opts} | sed -e 's_|_ _'g`; do 313 if [ "$1" != "${opt}" ]; then 314 toosdirnames="${toosdirnames} -e s|/${opt}/|/${1}/|g" 315 patt="${patt}${1}/" 316 if [ "${patt}" != "/${1}/" ]; then 317 toosdirnames="${toosdirnames} -e s|${patt}|/${1}/|g" 318 fi 319 fi 320 done 321 shift 322 done 323 done 324 fi 325 fi 326 327 # We need another recursive shell script to correctly handle positive 328 # matches. If we are invoked as 329 # genmultilib "opt1 opt2" "" "opt1=nopt1 opt2=nopt2" 330 # we must output 331 # opt1/opt2 opt1 opt2 332 # opt1/opt2 nopt1 opt2 333 # opt1/opt2 opt1 nopt2 334 # opt1/opt2 nopt1 nopt2 335 # In other words, we must output all combinations of matches. 336 rm -f tmpmultilib2 337 cat >tmpmultilib2 <<EOF 338 #!${CONFIG_SHELL:-/bin/sh} 339 EOF 340 cat >>tmpmultilib2 <<\EOF 341 # The positional parameters are a list of matches to consider. 342 # ${dirout} is the directory name and ${optout} is the current list of 343 # options. 344 if [ "$#" = "0" ]; then 345 echo "\"${dirout} ${optout};\"," 346 else 347 first=$1 348 shift 349 dirout="${dirout}" optout="${optout}" ./tmpmultilib2 $@ 350 l=`echo ${first} | sed -e 's/=.*$//' -e 's/?/=/g'` 351 r=`echo ${first} | sed -e 's/^.*=//' -e 's/?/=/g'` 352 if expr " ${optout} " : ".* ${l} .*" > /dev/null; then 353 newopt=`echo " ${optout} " | sed -e "s/ ${l} / ${r} /" -e 's/^ //' -e 's/ $//'` 354 dirout="${dirout}" optout="${newopt}" ./tmpmultilib2 $@ 355 fi 356 fi 357 EOF 358 chmod +x tmpmultilib2 359 360 # Start with the current directory, which includes only negations. 361 optout= 362 for set in ${options}; do 363 for opt in `echo ${set} | sed -e 's_[/|]_ _g'`; do 364 optout="${optout} !${opt}" 365 done 366 done 367 optout=`echo ${optout} | sed -e 's/^ //'` 368 echo "\".${defaultosdirname} ${optout};\"," 369 [ -n "${defaultosdirname2}" ] && echo "\".${defaultosdirname2} ${optout};\"," 370 371 # This part of code convert an option combination to 372 # its corresponding directory names. 373 # The directory names will be deduced from MULTILIB_DIRNAMES, 374 # MULTILIB_OSDIRNAMES or the option combination itself. 375 rm -rf tmpmultilib3 376 cat >tmpmultilib3 <<\EOF 377 #!/bin/sh 378 379 dirout= 380 combo=$1 381 todirnames=$2 382 toosdirnames=$3 383 enable_multilib=$4 384 385 if [ -n "${todirnames}" ]; then 386 dirout=`echo ${combo} | sed ${todirnames}` 387 else 388 dirout=`echo ${combo} | sed -e 's/=/-/g'` 389 fi 390 # Remove the leading and trailing slashes. 391 dirout=`echo ${dirout} | sed -e 's|^/||' -e 's|/*:/*|:|' -e 's|/$||g'` 392 393 # Use the OS directory names rather than the option names. 394 if [ -n "${toosdirnames}" ]; then 395 osdirout=`echo ${combo} | sed ${toosdirnames}` 396 # Remove the leading and trailing slashes. 397 osdirout=`echo ${osdirout} | sed -e 's|^/||' -e 's|/*:/*|:|' -e 's|/$||g'` 398 if [ "x${enable_multilib}" != xyes ]; then 399 dirout=".:${osdirout}" 400 disable_multilib=yes 401 else 402 case "${osdirout}" in 403 !*) 404 dirout=`echo ${osdirout} | sed 's/^!//'` 405 ;; 406 *) 407 dirout="${dirout}:${osdirout}" 408 ;; 409 esac 410 fi 411 else 412 if [ "x${enable_multilib}" != xyes ]; then 413 # genmultilib with --disable-multilib should be 414 # called with '' '' '' '' '' '' '' no 415 # if MULTILIB_OSDIRNAMES is empty. 416 exit 1 417 fi 418 fi 419 echo "${dirout}" 420 EOF 421 chmod +x tmpmultilib3 422 423 # Script to look through the options and output each option that is present, 424 # and negate each option that is not present. 425 rm -rf tmpmultilib4 426 cat > tmpmultilib4 <<\EOF 427 #!/bin/sh 428 429 optout= 430 combo=$1 431 options=$2 432 433 for set in ${options}; do 434 setopts=`echo ${set} | sed -e 's_[/|]_ _g'` 435 for opt in ${setopts}; do 436 if expr "${combo} " : ".*/${opt}/.*" > /dev/null; then 437 optout="${optout} ${opt}" 438 else 439 optout="${optout} !${opt}" 440 fi 441 done 442 done 443 optout=`echo ${optout} | sed -e 's/^ //'` 444 echo "${optout}" 445 EOF 446 chmod +x tmpmultilib4 447 448 # Work over the list of combinations. We have to translate each one 449 # to use the directory names rather than the option names, we have to 450 # include the information in matches, and we have to generate the 451 # correct list of options and negations. 452 for combo in ${combinations}; do 453 # Use the directory names rather than the option names. 454 dirout=`./tmpmultilib3 "${combo}" "${todirnames}" "${toosdirnames}" "${enable_multilib}"` 455 456 # Look through the options. We must output each option that is 457 # present, and negate each option that is not present. 458 optout=`./tmpmultilib4 "${combo}" "${options}"` 459 460 # Output the line with all appropriate matches. 461 dirout="${dirout}" optout="${optout}" ./tmpmultilib2 462 done 463 464 # Terminate the list of string. 465 echo "NULL" 466 echo "};" 467 468 # Generate a regular expression to validate option combinations. 469 options_re= 470 for set in ${options}; do 471 for opt in `echo ${set} | sed -e 's_[/|]_ _g' -e 's/+/./g' `; do 472 options_re="${options_re}${options_re:+|}${opt}" 473 done 474 done 475 options_re="^/((${options_re})/)*\$" 476 477 # Output rules used for multilib reuse. 478 echo "" 479 echo "static const char *const multilib_reuse_raw[] = {" 480 for rrule in ${multilib_reuse}; do 481 # The left part of the rule are the options we used to build multilib. 482 # The right part of the rule are the options that can reuse this multilib. 483 combo=`echo ${rrule} | sed -e 's/=.*$//' -e 's/\([^\\]\)\./\1=/g' -e 's/\\\././g'` 484 copts=`echo ${rrule} | sed -e 's/^.*=//' -e 's/\([^\\]\)\./\1=/g' -e 's/\\\././g'` 485 # The variable ${combinations} are the option combinations we will build 486 # multilib from. If the combination in the left part of reuse rule isn't 487 # in this variable, it means no multilib will be built for current reuse 488 # rule. Thus the reuse purpose specified by current rule is meaningless. 489 if expr "${combinations} " : ".*/${combo}/.*" > /dev/null; then 490 if echo "/${copts}/" | grep -E "${options_re}" > /dev/null; then 491 combo="/${combo}/" 492 dirout=`./tmpmultilib3 "${combo}" "${todirnames}" "${toosdirnames}" "${enable_multilib}"` 493 copts="/${copts}/" 494 optout=`./tmpmultilib4 "${copts}" "${options}"` 495 # Output the line with all appropriate matches. 496 dirout="${dirout}" optout="${optout}" ./tmpmultilib2 497 else 498 echo "The rule ${rrule} contains an option absent from MULTILIB_OPTIONS." >&2 499 exit 1 500 fi 501 else 502 echo "The rule ${rrule} is trying to reuse nonexistent multilib." >&2 503 exit 1 504 fi 505 done 506 507 # Terminate the list of string. 508 echo "NULL" 509 echo "};" 510 511 # Output all of the matches now as option and that is the same as that, with 512 # a semicolon trailer. Include all of the normal options as well. 513 # Note, the format of the matches is reversed compared 514 # to what we want, so switch them around. 515 echo "" 516 echo "static const char *const multilib_matches_raw[] = {" 517 for match in ${matches}; do 518 l=`echo ${match} | sed -e 's/=.*$//' -e 's/?/=/g'` 519 r=`echo ${match} | sed -e 's/^.*=//' -e 's/?/=/g'` 520 echo "\"${r} ${l};\"," 521 done 522 for set in ${options}; do 523 for opt in `echo ${set} | sed -e 's_[/|]_ _'g`; do 524 echo "\"${opt} ${opt};\"," 525 done 526 done 527 echo "NULL" 528 echo "};" 529 530 # Output the default options now 531 echo "" 532 echo "static const char *multilib_extra = \"${extra}\";" 533 534 # Output the exclusion rules now 535 echo "" 536 echo "static const char *const multilib_exclusions_raw[] = {" 537 for rule in ${exclusions}; do 538 s=`echo ${rule} | sed -e 's,/, ,g'` 539 echo "\"${s};\"," 540 done 541 echo "NULL" 542 echo "};" 543 544 # Output the options now 545 moptions=`echo ${options} | sed -e 's,[ ][ ]*, ,g'` 546 echo "" 547 echo "static const char *multilib_options = \"${moptions}\";" 548 549 # Finally output the disable flag if specified 550 if [ "x${disable_multilib}" = xyes ]; then 551 echo "" 552 echo "#define DISABLE_MULTILIB 1" 553 fi 554 555 cd .. 556 rm -r tmpmultilib.$$ 557 558 exit 0 559
Indexes created Sat Apr 25 00:22:52 UTC 2026